1
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Dong X, Wan B, Zha JW. Versatile Landscape of Low- k Polyimide: Theories, Synthesis, Synergistic Properties, and Industrial Integration. Chem Rev 2024; 124:7674-7711. [PMID: 38847509 DOI: 10.1021/acs.chemrev.3c00802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/27/2024]
Abstract
The development of microelectronics and large-scale intelligence nowadays promotes the integration, miniaturization, and multifunctionality of electronic and devices but also leads to the increment of signal transmission delays, crosstalk, and energy consumption. The exploitation of materials with low permittivity (low-k) is crucial for realizing innovations in microelectronics. However, due to the high permittivity of conventional interlayer dielectric material (k ∼ 4.0), it is difficult to meet the demands of current microelectronic technology development (k < 3.0). Organic dielectric materials have attracted much attention because of their relatively low permittivity owing to their low material density and low single bond polarization. Polyimide (PI) exhibits better application potential based on its well permittivity tunability (k = 1.1-3.2), high thermal stability (>500 °C), and mechanical property (modulus of elasticity up to 3.0-4.0 GPa). In this review, based on the synergistic relationship of dielectric parameters of materials, the development of nearly 20 years on low-k PI is thoroughly summarized. Moreover, process strategies for modifying low-k PI at the molecular level, multiphase recombination, and interface engineering are discussed exhaustively. The industrial application, technological challenges, and future development of low-k PI are also analyzed, which will provide meaningful guidance for the design and practical application of multifunctional low-k materials.
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Affiliation(s)
- Xiaodi Dong
- Beijing Advanced Innovation Center for Materials Genome Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Baoquan Wan
- Beijing Advanced Innovation Center for Materials Genome Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Jun-Wei Zha
- Beijing Advanced Innovation Center for Materials Genome Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
- Shunde Innovation School, University of Science and Technology Beijing, Foshan 528300, China
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2
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Liu F, Li M, Sun J, Fang Q. Bio-based Low- k Polymers at High Frequency Derived from Anethole: Synthesis and the Relationship between the Structures and the Properties. Biomacromolecules 2023; 24:4819-4830. [PMID: 37603588 DOI: 10.1021/acs.biomac.3c00558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2023]
Abstract
Bio-based polymers have been widely investigated as sustainable low dielectric (low-k) materials in past decades. Nevertheless, a few of the polymers with excellent comprehensive properties have been achieved to satisfy the requirements of high-frequency communication application. In this paper, two fluorinated monomers (BCB-F and 2BCB-F) have been designed and successfully prepared from biomass anethole. The thermal-cross-linkable benzocyclobutene and polyfluorobenzene groups were introduced in order to obtain low-k polymers with good comprehensive properties. A control monomer C1 was prepared from the estragole, the isomer of anethole, to study intensively the effect of structures on properties. Among the thermally cured polymers, cured BCB-F with higher fluoride content shows a comparable dielectric constant (Dk) of 2.62 and lower dielectric loss (Df) of 1.31 × 10-3 at a frequency of 10 GHz, as well as better hydrophobic properties with a water uptake of 0.18%. Such good hydrophobic properties enable it to maintain the good dielectric properties even after being soaked in boiling water for 96 h. Cured 2BCB-F with bifunctional benzocyclobutene groups displays excellent heat resistance with a high glass transition temperature (Tg) of 408 °C and a low coefficient of thermal expansion (CTE) of 52 ppm/°C in the temperature range 30-300 °C. Cured 2BCB-F also shows good dielectric properties with a Dk of 2.61 and a Df of 2.60 × 10-3 at a frequency of 10 GHz. The good comprehensive properties reveal that the anethole-based polymers are suitable candidates as matrix or encapsulation resins for application in electronics and microelectric fields.
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Affiliation(s)
- Fengping Liu
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Minghui Li
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Jing Sun
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Qiang Fang
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
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3
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Lin TJ. The Influence of Large Pendent Groups on Chain Anisotropy and Electrical Energy Loss of Polyimides at High Frequency through All-Atomic Molecular Simulation. Chemphyschem 2023:e202300479. [PMID: 37802978 DOI: 10.1002/cphc.202300479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 10/06/2023] [Accepted: 10/06/2023] [Indexed: 10/08/2023]
Abstract
Polyimide is a potential material for high-performance printed circuit boards because of its chemical stability and excellent thermal and mechanical properties. Flexible printed circuit boards must have a low static dielectric constant and dielectric loss to reduce signal loss in high-speed communication devices. Engineering the molecular structure of polyimides with large pendant groups is a strategy to reduce their dielectric constant. However, there is no systematic study on how the large pendant groups influence electrical energy loss. We integrated all-atomic molecular dynamics and semi-empirical quantum mechanical calculations to examine the influence of pendant groups on polymer chain anisotropy and electrical energy loss at high frequencies. We analyzed the radius of gyration, relative shape anisotropy, dipole moment, and degree of polarization of the selected polyimides (TPAHF, TmBPHF, TpBPHF, MPDA, TriPMPDA, m-PDA, and m-TFPDA). The simulation results show that anisotropy perpendicular to chain direction and local chain rigidity correlate to electrical energy loss rather than dipole moment magnitudes. Polyimides with anisotropic pendant groups and significant local chain rigidity reduce electrical energy loss. The degree of polarization correlated well with the dielectric loss with a moderate computational cost, and difficulties in directly calculating the dielectric loss were circumvented.
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Affiliation(s)
- Tzu-Jen Lin
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei City, Taiwan
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Lian M, Zheng F, Meng L, Zhao F, Liu J, Song J, Lu Q. Comparison of Homo-Polyimide Films Derived from Two Isomeric Bis-Benzimidazole Diamines. Molecules 2023; 28:4889. [PMID: 37446551 PMCID: PMC10343788 DOI: 10.3390/molecules28134889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 06/16/2023] [Accepted: 06/19/2023] [Indexed: 07/15/2023] Open
Abstract
Heteroaromatic polyimides (PIs) containing benzimidazole have attracted tremendous attention due to their positive impact on the properties of PIs. Some research on PIs containing 4,4'-[5,5'-bi-1H-benzimidazole]-2,2'-diylbis-benzenamine (4-AB) has been reported. However, reports are lacking on homo-polyimides (homo-PIs) containing 3,3'-[5,5'-bi-1H-benzimidazole]-2,2'-diylbis-benzenamine (3-AB), which is one of the isomers of 4-AB. In this paper, the influence of amino groups' positions on the performance of homo-PIs was investigated. It was found that the net charge of the amine N group in 4-AB was lower than that of 3-AB, resulting in higher reactivity of 4-AB. Consequently, PIs containing 4-AB displayed better mechanical performance. Molecular simulation confirmed that 3-AB and its corresponding PI chain exhibited distorted conformation, leading to the PI films containing 3-AB having a lighter color. In addition, the 3-AB structure was calculated to have higher rotational energy compared to 4-AB, resulting in a higher glass transition temperature (Tg) in PIs prepared from 3-AB. On the other hand, PIs containing 4-AB exhibited a higher level of molecular linearity, leading to a lower coefficient of thermal expansion (CTE) compared to PIs prepared from 3-AB. Furthermore, all PIs showed higher thermal stability with a 5% weight loss temperature above 530 °C and Tg higher than 400 °C.
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Affiliation(s)
- Meng Lian
- Shandong Engineering Laboratory for Clean Utilization of Chemical Resources, Weifang University of Science and Technology, Weifang 262700, China; (M.L.); (L.M.); (F.Z.); (J.L.); (J.S.)
| | - Feng Zheng
- School of Chemical Science and Engineering, Tongji University, Siping Road 1239, Shanghai 200092, China
| | - Lingbin Meng
- Shandong Engineering Laboratory for Clean Utilization of Chemical Resources, Weifang University of Science and Technology, Weifang 262700, China; (M.L.); (L.M.); (F.Z.); (J.L.); (J.S.)
| | - Fei Zhao
- Shandong Engineering Laboratory for Clean Utilization of Chemical Resources, Weifang University of Science and Technology, Weifang 262700, China; (M.L.); (L.M.); (F.Z.); (J.L.); (J.S.)
| | - Jun Liu
- Shandong Engineering Laboratory for Clean Utilization of Chemical Resources, Weifang University of Science and Technology, Weifang 262700, China; (M.L.); (L.M.); (F.Z.); (J.L.); (J.S.)
| | - Jimei Song
- Shandong Engineering Laboratory for Clean Utilization of Chemical Resources, Weifang University of Science and Technology, Weifang 262700, China; (M.L.); (L.M.); (F.Z.); (J.L.); (J.S.)
| | - Qinghua Lu
- Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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Lian M, Zhao F, Liu J, Tong F, Meng L, Yang Y, Zheng F. The Pivotal Role of Benzimidazole in Improving the Thermal and Dielectric Performance of Upilex-Type Polyimide. Polymers (Basel) 2023; 15:polym15102343. [PMID: 37242916 DOI: 10.3390/polym15102343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Revised: 05/08/2023] [Accepted: 05/13/2023] [Indexed: 05/28/2023] Open
Abstract
Polyimide (PI) with ultra-high thermal resistance and stability is essential for application as a flexible substrate in electronic devices. Here, the Upilex-type polyimides, which contained flexibly "twisted" 4,4'-oxydianiline (ODA), have achieved various performance improvements via copolymerization with a diamine containing benzimidazole structure. With the rigid benzimidazole-based diamine bearing conjugated heterocyclic moieties and hydrogen bond donors fused into the PI backbone, the benzimidazole-containing PI showed outstanding thermal, mechanical, and dielectric performance. Specifically, the PI containing 50% bis-benzimidazole diamine achieved a 5% decomposition temperature at 554 °C, an excellent high glass transition temperature of 448 °C, and a coefficient of thermal expansion lowered to 16.1 ppm/K. Meanwhile, the tensile strength and modulus of the PI films containing 50% mono-benzimidazole diamine increased to 148.6 MPa and 4.1 GPa, respectively. Due to the synergistic effect of rigid benzimidazole and hinged, flexible ODA, all PI films exhibited an elongation at break above 4.3%. The electrical insulation of the PI films was also improved with a dielectric constant lowered to 1.29. In summary, with appropriate mixing of rigid and flexible moieties in the PI backbone, all the PI films showed superior thermal stability, excellent flexibility, and acceptable electrical insulation.
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Affiliation(s)
- Meng Lian
- Shandong Engineering Laboratory for Clean Utilization of Chemical Resources, Weifang University of Science and Technology, Weifang 262700, China
| | - Fei Zhao
- Shandong Engineering Laboratory for Clean Utilization of Chemical Resources, Weifang University of Science and Technology, Weifang 262700, China
| | - Jun Liu
- Shandong Engineering Laboratory for Clean Utilization of Chemical Resources, Weifang University of Science and Technology, Weifang 262700, China
| | - Faqin Tong
- Shanghai Sinochem Technology Co., Ltd., Kangwei Road 299, Pudong New District, Shanghai 201210, China
| | - Lingbin Meng
- Shandong Engineering Laboratory for Clean Utilization of Chemical Resources, Weifang University of Science and Technology, Weifang 262700, China
| | - Yongqi Yang
- Shandong Engineering Laboratory for Clean Utilization of Chemical Resources, Weifang University of Science and Technology, Weifang 262700, China
| | - Feng Zheng
- School of Chemical Science and Engineering, Tongji University, Siping Road 1239, Shanghai 200092, China
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6
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Tang J, Li W, Wang Z. Facile synthesis of soluble, self-crosslinkable and crystalline polyimides with ultrahigh thermal/chemical resistance. POLYMER 2023. [DOI: 10.1016/j.polymer.2023.125717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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7
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Li X, Wang M, Mushtaq N, Chen G, Li G, Fang X, Zhang A. Colorless polyimide films with low birefringence and retardation: Synthesis and characterization. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
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8
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Wu M, Han W, Zhang C, Zhang S, Zhang X, Chen X, Naito K, Yu X, Zhang Q. Rational Design of Fluorinated Phthalonitrile/Hollow Glass Microsphere Composite with Low Dielectric Constant and Excellent Heat Resistance for Microelectronic Packaging. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3973. [PMID: 36432259 PMCID: PMC9698618 DOI: 10.3390/nano12223973] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 11/05/2022] [Accepted: 11/07/2022] [Indexed: 06/16/2023]
Abstract
High-performance composites with a resin matrix are urgently required for electronic packaging due to their low dielectric constant, outstanding high temperature resistance, excellent corrosion resistance, light weight and easy molding. In this work, hollow-glass-microsphere (HGM)-filled fluorinated-phthalonitrile (PBDP) composites, with filler contents ranging from 0 to 35.0 vol.%, were prepared in order to modify the dielectric properties of the phthalonitrile. Scanning electron microscopy (SEM) observations indicate that the modified HGM particles were uniformly dispersed in the matrix. The PBDP/27.5HGM-NH2 composite demonstrates a low dielectric constant of 1.85 at 12 GHz. The 5% thermogravimetric temperature (T5) of composites with silanized HGM filler (481-486 °C) is higher than the minimum packaging-material requirements (450 °C). In addition, the heat-resistance index (THRI) of PBDP/HGM-NH2 composites reached as high as 268 °C. the storage modulus of PBDP/HGM-NH2 composites were significantly increased to 1283 MPa at 400 °C, an increase by 50%, in comparison to that of PBDP phthalonitrile resin (857 MPa). The excellent dielectric and thermal properties of the present composites may pave a way for comprehensive applications in electronic packaging and thermal management for energy systems.
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Affiliation(s)
- Minjie Wu
- Hebei Key Laboratory of Functional Polymers, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300401, China
| | - Wenshuang Han
- Hebei Key Laboratory of Functional Polymers, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300401, China
| | - Chun Zhang
- Hebei Key Laboratory of Functional Polymers, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300401, China
| | - Shuo Zhang
- Hebei Key Laboratory of Functional Polymers, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300401, China
| | - Xinyang Zhang
- Hebei Key Laboratory of Functional Polymers, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300401, China
| | - Xinggang Chen
- School of Materials Science and Engineering, North China University of Science and Technology, Tangshan 063210, China
| | - Kimiyoshi Naito
- National Institute for Materials Science (NIMS), Hybrid Materials Unit, Composite Materials Group, 1-2-1 Sengen, Tsukuba 305-0047, Japan
| | - Xiaoyan Yu
- Hebei Key Laboratory of Functional Polymers, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300401, China
| | - Qingxin Zhang
- Hebei Key Laboratory of Functional Polymers, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300401, China
- Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, Hebei University of Technology, Tianjin 300401, China
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9
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Lee JS, Yan YZ, Park SS, Ahn SK, Ha CS. A Novel Diamine Containing Ester and Diphenylethane Groups for Colorless Polyimide with a Low Dielectric Constant and Low Water Absorption. Polymers (Basel) 2022; 14:4504. [PMID: 36365498 PMCID: PMC9657050 DOI: 10.3390/polym14214504] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 10/13/2022] [Accepted: 10/21/2022] [Indexed: 07/30/2023] Open
Abstract
In this study, a novel diamine monomer containing ester and phenyl moieties, 1,2-diphenylethane-1,2-diyl bis(4-aminobenzoate) (1,2-DPEDBA), was synthesized through a three-step reaction. Using this diamine, a novel polyimide (PI) film was prepared with 4,4'-(hexafluoroisopropylidene)diphthalic anhydride (6-FDA) as a counter dianhydride through a typical two-step chemical imidization. For comparison, poly(pyromellitic dianhydride-co-4,4'-oxydianiline) (PMDA-ODA PI) was also synthesized via thermal imidization. The resulting 6-FDA-DPEDBA PI film was not only soluble in common polar solvents with high boiling points, such as N,N-dimethylacetamide (DMAc) and N,N-dimethylformamide (DMF), but also soluble in common low-boiling-point polar solvents, such as chloroform (CHCl3) and dichloromethane (CH2Cl2), at room temperature. The resulting novel PI showed a 5% weight loss temperature (T5d) at 360 °C under a nitrogen atmosphere. The resulting PI film was colorless and transparent with a transmittance of 87.1% in the visible light region ranging from 400 to 760 nm. The water absorption of the novel PI film was of 1.78%. The PI film also possessed a good moisture barrier and hydrophobicity. Furthermore, the resulting PI film displayed a low dielectric constant of 2.17 at 106 Hz at room temperature. In conclusion, the novel PI film exhibited much better optical transparency, lower moisture absorption, and a lower dielectric constant as well as better solubility than the PMDA-ODA PI film, which is insoluble in any solvent, although its thermal stability is not better than that of PMDA-ODA PI.
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Affiliation(s)
- Jun Seok Lee
- Department of Polymer Science and Engineering, School of Chemical Engineering, Pusan National University, Busan 46241, Korea
| | - Yong-Zhu Yan
- Department of Polymer Science and Engineering, School of Chemical Engineering, Pusan National University, Busan 46241, Korea
| | - Sung Soo Park
- Division of Advanced Materials Engineering, Dong-Eui University, Busan 47340, Korea
| | - Suk-kyun Ahn
- Department of Polymer Science and Engineering, School of Chemical Engineering, Pusan National University, Busan 46241, Korea
| | - Chang-Sik Ha
- Department of Polymer Science and Engineering, School of Chemical Engineering, Pusan National University, Busan 46241, Korea
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10
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Tang W, Liao X, Shi S, Wang B, Lv C, Zou F, Li G. Significantly Enhanced Porosity of Silicone Rubber Nanocomposite Foams via Cross-Linking Structure Regulation and Heterogeneous Nucleation by CNTs for Promising Ultralow- k Dielectrics. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c01865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wanyu Tang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Xia Liao
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Shaozhe Shi
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Bo Wang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Cuifang Lv
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Fangfang Zou
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Guangxian Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
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Frequency Response of Thermo-Optic Phase Modulators Based on Fluorinated Polyimide Polymer Waveguide. Polymers (Basel) 2022; 14:polym14112186. [PMID: 35683859 PMCID: PMC9182701 DOI: 10.3390/polym14112186] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 05/25/2022] [Accepted: 05/26/2022] [Indexed: 02/04/2023] Open
Abstract
Polymer waveguide phase modulators exhibit stable low-power phase modulation owing to their exceptional thermal confinement and high thermo-optic effect, and thus, have the merit of thermal isolation between channels, which is crucial for an optical phased array (OPA) beam scanner device. In this work, a waveguide phase modulator was designed and fabricated based on a high-refractive-index fluorinated polyimide. The propagation loss of the polyimide waveguide and the temporal response of the phase modulator were characterized. Moreover, the transfer function of the phase modulator including multiple poles and zeros was obtained from the measured frequency response. The polyimide waveguide modulator device demonstrated a fast response time of 117 μs for 1 kHz input signal, however, for 1 mHz step-function input, it exhibited an additional 5% phase change in 5 s.
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12
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Li Q, Park SS, Ha CS, Yuan S, Shi L. Synthesis and characterization of an adamantane-based copolyimides with high transparency. HIGH PERFORM POLYM 2022. [DOI: 10.1177/09540083221097381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
In this work, a copolyimide (Co-PI) film with high transparency was prepared by the copolymerization of hexafluoroisopropylidene)diphthalic anhydride (6FDA), 3,3′,4,4′-biphenyltetracarboxylic dianhydride (BPDA), 2,2′-Bis(trifluoromethyl)benzidine (TFMB) and adamantane-1,3-diamine (DAA). The effects of DAA monomers on the optical, thermal, and mechanical properties of the co-PIs were discussed in detail. We found that the preparation of polyimide (PI) based on the combination of two dianhydrides and two diamines could obtain the co-PI film with excellent comprehensive performance due to the synergy between the -CF3 group, the aliphatic ring and the aromatic structure. Through the structure and composition optimization, the co-PI film with 1.30% DAA (Q3) has a Tg of 374oC, T5 higher than 530oC, T430 of 82% and the tensile strength higher than 145 MPa. These results indicate that the Co-PI films can be successfully utilized in the development of novel heat-resistant plastic substrates for the optoelectronic engineering applications.
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Affiliation(s)
- Qi Li
- Emerging Industries Institute, Shanghai University, Jiaxing, China
| | - Sung S Park
- Department of Polymer Science and Engineering, School of Chemical Engineering, Pusan National University, Busan, Republic of Korea
| | - Chang-Sik Ha
- Department of Polymer Science and Engineering, School of Chemical Engineering, Pusan National University, Busan, Republic of Korea
| | - Shuai Yuan
- Emerging Industries Institute, Shanghai University, Jiaxing, China
- Research Centre of Nanoscience and Nanotechnology, Shanghai University, Shanghai, China
| | - Liyi Shi
- Emerging Industries Institute, Shanghai University, Jiaxing, China
- Research Centre of Nanoscience and Nanotechnology, Shanghai University, Shanghai, China
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13
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Rodríguez-Molina M, Galicia-Badillo D, Cetina-Mancilla E, Cárdenas J, Olvera LI, Toscano RA, Rodríguez-Molina B, Zolotukhin MG. 9-Trifluoromethylxanthenediols: Synthesis and Supramolecular Motifs. ACS OMEGA 2022; 7:13520-13528. [PMID: 35559143 PMCID: PMC9088779 DOI: 10.1021/acsomega.1c06635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 03/31/2022] [Indexed: 06/15/2023]
Abstract
The synthesis of four derivatives and the single-crystal X-ray structures of six 9-trifluoromethylxanthenediols (TFXdiols) I-VI are analyzed in this work. These compounds were obtained through superacid-catalyzed condensation of dihydroxybenzenes with 1,1,1-trifluoroacetone or 2,2,2-trifluoroacetophenone. The title molecules have a convex molecular structure due to their three fused rings of the xanthene moiety. We have found that, similar to resorcinol, the configuration of the hydroxyl groups is of great relevance for the crystal packing favoring either interactions above and below their molecular plane or lateral interactions that create layers. Considering that reports of TFXdiols are very scarce, our findings contribute to a better understanding of the molecular conformation and intermolecular interactions in their crystal structures. A similar analysis was extended to a fortuitous cocrystal obtained between 9-trifluoromethyl-9-(4'-fluorophenyl)-xanthenediol and 1,4-dihydroxybenzene, showing that these structures might be used to obtain cocrystals in the future.
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Affiliation(s)
- Manuel Rodríguez-Molina
- Instituto
de Investigaciones en Materiales, Universidad Nacional Autónoma
de México, Av. Universidad, CU, Coyoacán, 04510 Ciudad de México, México
| | - Dazaet Galicia-Badillo
- Instituto
de Química, Universidad Nacional Autónoma de México, Av. Universidad, CU, Coyoacán, 04510 Ciudad de México, México
| | - Enoc Cetina-Mancilla
- Instituto
de Investigaciones en Materiales, Universidad Nacional Autónoma
de México, Av. Universidad, CU, Coyoacán, 04510 Ciudad de México, México
| | - Jorge Cárdenas
- Instituto
de Química, Universidad Nacional Autónoma de México, Av. Universidad, CU, Coyoacán, 04510 Ciudad de México, México
| | - Lilian I. Olvera
- Instituto
de Investigaciones en Materiales, Universidad Nacional Autónoma
de México, Av. Universidad, CU, Coyoacán, 04510 Ciudad de México, México
| | - Rubén A. Toscano
- Instituto
de Química, Universidad Nacional Autónoma de México, Av. Universidad, CU, Coyoacán, 04510 Ciudad de México, México
| | - Braulio Rodríguez-Molina
- Instituto
de Química, Universidad Nacional Autónoma de México, Av. Universidad, CU, Coyoacán, 04510 Ciudad de México, México
| | - Mikhail G. Zolotukhin
- Instituto
de Investigaciones en Materiales, Universidad Nacional Autónoma
de México, Av. Universidad, CU, Coyoacán, 04510 Ciudad de México, México
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14
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Zhang T, Yang Z, Piao F, Guo H. Transparent polyimide films with ultra-low coefficient of thermal expansion. HIGH PERFORM POLYM 2022. [DOI: 10.1177/09540083221097384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
According to the application requirements of colorless transparent polyimide (CPI) film for low coefficient of thermal expansion (CTE) in the field of OLED display, the new aromatic dianhydride monomers with amide bond structure were synthesized, namely s-ABDA, i-ABDA, EADA. Furthermore, a series of CPI films were prepared by two-step method from the reaction of as-synthesized dianhydrides with 2.2′-bis (trifluoromethyl) −4.4′-diaminobiphenyl (TFMB) or trans-1.4′-cyclohexanediamine ( t-CHDA). Based on the analysis of performance results, the incorporation of amide group and biphenyl, benzene or ether bond into dianhydride monomer helped this new type of transparent polyimide film with excellent optical properties (T550 nm> 88%), great heat stability (CTE < 4.4 ppm/K; Tg > 314°C; Td5% > 478°C) and good mechanical strength (σ > 208 MPa). The film s-ABDA/TFMB showed ultra-low CTE value at 4.4 ppm/K, aligning with the maximum birefringence, indicating that the role of hydrogen bonding was of great benefit to the regulation of thermal expansion.
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Affiliation(s)
- Tingting Zhang
- College of Science, Yanbian University, Yanji 133000, China
| | - Zhenghui Yang
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China
| | - Fengyu Piao
- College of Science, Yanbian University, Yanji 133000, China
| | - Haiquan Guo
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China
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15
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Feng J, Wang Y, Qin X, Lv Y, Huang Y, Yang Q, Li G, Kong M. Property Evolution and Molecular mechanisms of Aluminized Colorless Transparent Polyimide under Space Ultraviolet Irradiation. Polym Degrad Stab 2022. [DOI: 10.1016/j.polymdegradstab.2022.109915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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16
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Huang B, Li K, Peng M, Cheng J. Polyimide/fluorinated silica composite films with low dielectric constant and low water absorption. HIGH PERFORM POLYM 2022. [DOI: 10.1177/09540083211073657] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
In this study, KMnO4 was applied as an etchant to partially decompose the silica microspheres into mesoporous structures. 1H,1H,2H,2H-perfluorodecyltriethoxysilane was grafted onto the surface of the hollow silica. A fluorinated silica/polyimide hybrid material was prepared. Meanwhile, the influence of fluorinated silica on the dielectric property and moisture absorption property of the hybrid material was discussed. It is found that the fluorinated silica can lower the dielectric constant and hygroscopicity of the hybrid film. The fluorinated silica is characterized by strong hydrophobicity, good dispersibility, and good thermal stability. Even at a very low filling level of only 2 wt%, the dielectric constant of the polyimide hybrid is significantly reduced to 2.61 without sacrificing thermal stability. The water absorption rate of the polyimide hybrid film is reduced from approximately 3.1% to 2.1 wt%. Moreover, this provides a new idea for reducing the dielectric and water absorption properties of materials.
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Affiliation(s)
- Bingliang Huang
- College of Materials Science and Engineering, Sichuan University of Science and Engineering, Zigong, China
| | - Ke Li
- College of Materials Science and Engineering, Sichuan University of Science and Engineering, Zigong, China
| | - Mingyun Peng
- College of Materials Science and Engineering, Sichuan University of Science and Engineering, Zigong, China
| | - Jie Cheng
- College of Materials Science and Engineering, Sichuan University of Science and Engineering, Zigong, China
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17
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Kumar S, Arumugham H, Roy D, Kannaiyan D. Synthesis and characterization of fluorine functionalized graphene oxide dispersed quinoline‐based polyimide composites having low‐k and
UV
shielding properties. POLYM ADVAN TECHNOL 2021. [DOI: 10.1002/pat.5527] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Selvaraj Kumar
- Department of Chemistry Thiruvalluvar University Vellore India
| | - Hariharan Arumugham
- Polymer Engineering Laboratory PSG Institute of Technology and Applied Research Coimbatore India
| | - Debmalya Roy
- Defence Materials & Stores Research & Development Establishment DMSRDE PO Kanpur India
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18
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Hu K, Ye Q, Fan Y, Nan J, Chen F, Gao Y, Shen Y. Preparation and characterization of organic soluble polyimides with low dielectric constant containing trifluoromethyl for optoelectronic application. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2021.110566] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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19
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Liu BW, Long JW, Chen L, Xiao XX, Lin XB, Wang YZ. Semi-aromatic polyamides containing fluorenyl pendent toward excellent thermal stability, mechanical properties and dielectric performance. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123757] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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20
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Huang J, Zhang G, Dong B, Liu J. Synthesis and Properties of Polyimide Silica Nanocomposite Film with High Transparent and Radiation Resistance. NANOMATERIALS 2021; 11:nano11030562. [PMID: 33668194 PMCID: PMC7995970 DOI: 10.3390/nano11030562] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 02/14/2021] [Accepted: 02/21/2021] [Indexed: 11/16/2022]
Abstract
In order to prepare flexible glass cover sheet materials suitable for space solar cells, fluorinated diamine 2,2’-bistrifluoromethyl benzidine (TFDB) and fluorinated dianhydride 4,4’ (hexafluoroisopropyl) diphthalic dianhydride (6FDA) as the monomer, polyimide (PI)/SiO2 composite film was synthesized by in situ polymerization, and the influence of coupling agent and SiO2 nanoparticle content on the film structure and properties was studied. The results show that PI synthesized from fluorine-containing monomers has better light transmittance, and the highest transmittance can reach 91.4%. The average visible light transmittance of the composite film decreases with the increase of SiO2 content, and the transmittance of the film decreases less in the high-wavelength region and greatly decreases in the low-wavelength region. The tensile strength and elastic modulus of PI/SiO2 composite film increase with the increase of SiO2 content, first increase and then decrease, reaching the maximum when the content is 10%; while the elongation at break of the composite film gradually increases with the increase of SiO2 content reduce. The thermal stability of PI/SiO2 composite film increases with the increase of SiO2 content. The doping of nano-SiO2 significantly suppresses the influence of irradiation on the mechanical properties of the film.
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Affiliation(s)
- Jindong Huang
- School of Materials Science and Engineering, Tiangong University, Tianjin 300387, China; (J.H.); (G.Z.); (B.D.)
- School of Physical Science and Technology, Tiangong University, Tianjin 300387, China
| | - Guanglu Zhang
- School of Materials Science and Engineering, Tiangong University, Tianjin 300387, China; (J.H.); (G.Z.); (B.D.)
- School of Physical Science and Technology, Tiangong University, Tianjin 300387, China
| | - Beiping Dong
- School of Materials Science and Engineering, Tiangong University, Tianjin 300387, China; (J.H.); (G.Z.); (B.D.)
| | - Juncheng Liu
- School of Materials Science and Engineering, Tiangong University, Tianjin 300387, China; (J.H.); (G.Z.); (B.D.)
- Correspondence: ; Tel.: +86-(0)-22-83-955-811
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21
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Huangfu MG, Shen DX, Zhi XX, Zhang Y, Jia YJ, An YC, Wei XY, Liu JG. Preparation and Characterization of Electrospun Fluoro-Containing Poly(imide-benzoxazole) Nano-Fibrous Membranes with Low Dielectric Constants and High Thermal Stability. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:537. [PMID: 33669852 PMCID: PMC7923222 DOI: 10.3390/nano11020537] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 02/16/2021] [Accepted: 02/17/2021] [Indexed: 11/30/2022]
Abstract
The rapid development of advanced high-frequency mobile communication techniques has advanced urgent requirements for polymer materials with high-temperature resistance and good dielectric properties, including low dielectric constants (low-Dk) and low dielectric dissipation factors (low-Df). The relatively poor dielectric properties of common polymer candidates, such as standard polyimides (PIs) greatly limited their application in high-frequency areas. In the current work, benzoxazole units were successfully incorporated into the molecular structures of the fluoro-containing PIs to afford the poly(imide-benzoxazole) (PIBO) nano-fibrous membranes (NFMs) via electrospinning fabrication. First, the PI NFMs were prepared by the electrospinning procedure from organo-soluble PI resins derived from 2,2'-bis(3,4-dicarboxy-phenyl)hexafluoropropane dianhydride (6FDA) and aromatic diamines containing ortho-hydroxy-substituted benzamide units, including 2,2-bis[3-(4-aminobenzamide)-4-hydroxylphenyl]hexafluoropropane (p6FAHP) and 2,2-bis[3-(3-aminobenzamide)-4-hydroxyphenyl]hexafluoropropane (m6FAHP). Then, the PI NFMs were thermally dehydrated at 350 °C in nitrogen to afford the PIBO NFMs. The average fiber diameters (dav) for the PIBO NFMs were 1225 nm for PIBO-1 derived from PI-1 (6FDA-p6FAHP) precursor and 816 nm for PIBO-2 derived from PI-2 (6FDA-m6FAHP). The derived PIBO NFMs showed good thermal stability with the glass transition temperatures (Tgs) over 310 °C and the 5% weight loss temperatures (T5%) higher than 500 °C in nitrogen. The PIBO NFMs showed low dielectric features with the Dk value of 1.64 for PIBO-1 and 1.82 for PIBO-2 at the frequency of 1 MHz, respectively. The Df values were in the range of 0.010~0.018 for the PIBO NFMs.
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Affiliation(s)
- Meng-Ge Huangfu
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (M.-G.H.); (X.-X.Z.); (Y.Z.); (Y.-J.J.); (Y.-C.A.); (X.-Y.W.)
| | - Deng-Xiong Shen
- Aerospace Research Institute of Materials& Processing Technology, Beijing 100076, China;
| | - Xin-Xin Zhi
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (M.-G.H.); (X.-X.Z.); (Y.Z.); (Y.-J.J.); (Y.-C.A.); (X.-Y.W.)
| | - Yan Zhang
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (M.-G.H.); (X.-X.Z.); (Y.Z.); (Y.-J.J.); (Y.-C.A.); (X.-Y.W.)
| | - Yan-Jiang Jia
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (M.-G.H.); (X.-X.Z.); (Y.Z.); (Y.-J.J.); (Y.-C.A.); (X.-Y.W.)
| | - Yuan-Cheng An
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (M.-G.H.); (X.-X.Z.); (Y.Z.); (Y.-J.J.); (Y.-C.A.); (X.-Y.W.)
| | - Xin-Ying Wei
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (M.-G.H.); (X.-X.Z.); (Y.Z.); (Y.-J.J.); (Y.-C.A.); (X.-Y.W.)
| | - Jin-Gang Liu
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (M.-G.H.); (X.-X.Z.); (Y.Z.); (Y.-J.J.); (Y.-C.A.); (X.-Y.W.)
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22
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Investigation of the Chemical Structure of Ultra-Thin Polyimide Substrate for the Xenon Flash Lamp Lift-off Technology. Polymers (Basel) 2021; 13:polym13040546. [PMID: 33673286 PMCID: PMC7918077 DOI: 10.3390/polym13040546] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 02/05/2021] [Accepted: 02/08/2021] [Indexed: 12/02/2022] Open
Abstract
Lift-off is one of the last steps in the production of next-generation flexible electronics. It is important that this step is completed quickly to prevent damage to ultrathin manufactured electronics. This study investigated the chemical structure of polyimide most suitable for the Xe Flash lamp–Lift-Off process, a next-generation lift-off technology that will replace the current dominant laser lift-off process. Based on the characteristics of the peeled-off polyimide films, the Xe Flash lamp based lift-off mechanism was identified as photothermal decomposition. This occurs by thermal conduction via light-to-heat conversion. The synthesized polyimide films treated with the Xe Flash lamp–Lift-Off process exhibited various thermal, optical, dielectric, and surface characteristics depending on their chemical structures. The polyimide molecules with high concentrations of –CF3 functional groups and kinked chemical structures demonstrated the most promising peeling properties, optical transparencies, and dielectric constants. In particular, an ultra-thin polyimide substrate (6 μm) was successfully fabricated and showed potential for use in next-generation flexible electronics.
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23
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Yang Z, Guo H, Kang C, Gao L. Synthesis and characterization of amide-bridged colorless polyimide films with low CTE and high optical performance for flexible OLED displays. Polym Chem 2021. [DOI: 10.1039/d1py00762a] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Starting from three novel amide-incorporating dianhydride monomers, we synthesized a series of amide-bridged cPI films that have ultra-low CTE and high Tg due to the formation of hydrogen bonds as well as great optical performance.
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Affiliation(s)
- Zhenghui Yang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- University of Science and Technology of China, Hefei 230026, China
| | - Haiquan Guo
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Chuanqing Kang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- University of Science and Technology of China, Hefei 230026, China
| | - Lianxun Gao
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
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24
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Zheng Zhu, Xu Y, Ye Z, Yan L, Tao Y, Ma W, Liu J, Jian Chen. Synthesis and Properties of Colorless Transparent Polyimides with Low CTE and High Tensile Strength. POLYMER SCIENCE SERIES B 2020. [DOI: 10.1134/s1560090420330076] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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25
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Zhang F, Li J, Wang T, Huang C, Ji F, Shan L, Zhang G, Sun R, Wong C. Fluorinated graphene/polyimide nanocomposites for advanced electronic packaging applications. J Appl Polym Sci 2020. [DOI: 10.1002/app.49801] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Fan Zhang
- Shenzhen Institute of Advanced Electronic Materials Shenzhen Fundamental Research Institutions China
- Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen China
- Shenzhen College of Advanced Technology University of Chinese Academy of Sciences Shenzhen China
| | - Jinhui Li
- Shenzhen Institute of Advanced Electronic Materials Shenzhen Fundamental Research Institutions China
- Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen China
| | - Tao Wang
- Shenzhen Institute of Advanced Electronic Materials Shenzhen Fundamental Research Institutions China
- Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen China
- Shenzhen College of Advanced Technology University of Chinese Academy of Sciences Shenzhen China
| | - Chao Huang
- Shenzhen Institute of Advanced Electronic Materials Shenzhen Fundamental Research Institutions China
- Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen China
- Department of Nano Science and Technology Institute University of Science and Technology of China Suzhou China
| | - Fei Ji
- Shenzhen Institute of Advanced Electronic Materials Shenzhen Fundamental Research Institutions China
- Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen China
| | - Liang Shan
- Shenzhen Institute of Advanced Electronic Materials Shenzhen Fundamental Research Institutions China
- Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen China
| | - Guoping Zhang
- Shenzhen Institute of Advanced Electronic Materials Shenzhen Fundamental Research Institutions China
- Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen China
| | - Rong Sun
- Shenzhen Institute of Advanced Electronic Materials Shenzhen Fundamental Research Institutions China
- Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen China
| | - Ching‐ping Wong
- Shenzhen Institute of Advanced Electronic Materials Shenzhen Fundamental Research Institutions China
- Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen China
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta Georgia USA
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26
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Chatterjee R, Ganesh Kumar A, Nikiforov R, Ryzhikh V, Belov N, Padmanabhan V, Yampolskii Y, Banerjee S. Novel semi-fluorinated poly(ether imide)s with benzyl ether side groups: Synthesis, physicochemical characterization, gas transport properties and simulation. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2020.109879] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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27
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Multifunctional polyimides by direct silyl ether reaction of pendant hydroxy groups: Toward low dielectric constant, high optical transparency and fluorescence. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2020.109742] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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28
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Liu Y, Wang J, Guo J, Qi D, Li W, Shen K. Novel fluorinated long linear segment hyperbranched polyimides bearing various pendant substituents for applications as optical materials. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122216] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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29
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Wu M, Xu J, Bai S, Chen X, Yu X, Naito K, Zhang Z, Zhang Q. A high-performance functional phthalonitrile resin with a low melting point and a low dielectric constant. SOFT MATTER 2020; 16:1888-1896. [PMID: 31994579 DOI: 10.1039/c9sm02328c] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A monomer of fluorinated phthalonitrile, namely 4,4'-bis(p-perfluoro-phenol-(bis(p-phenol)propane-2,2-diyl)-p-oxy-diphthalonitrile) (PBDP), was synthesized by the nucleophilic substitution reaction of bisphenol A, decafluorobiphenyl and 4-nitrophthalonitrile. The structure of the monomer was characterized by nuclear magnetic resonance (NMR) spectroscopy and Fourier transform infrared (FTIR) spectroscopy. The results indicated that the PBDP monomer was synthesized successfully. The monomer was cured in the presence of 4-(aminophenoxy)phthalonitrile (APPH) and the curing behaviour was investigated by differential scanning calorimetry (DSC), suggesting a low melting point of 96 °C and an excellent processing window (96-262 °C). Thermogravimetric analysis (TGA) and dynamic mechanical analysis (DMA) showed that the fluorinated phthalonitrile resin possessed outstanding thermal and thermo-oxidative stabilities as well as good mechanical properties. The glass transition temperature was >400 °C and the 5% thermal degradation temperature was 501 °C. When the frequency was 50 MHz, the dielectric constant and dielectric loss of the polymer were 2.84 and 0.007, respectively. The PBDP resin has ultra-low water absorption of 0.77% and 1.4%, when exposed to an aqueous environment for 50 days at 24 °C and for 24 h at 100 °C, respectively. The prepared PBDP resin with outstanding thermal stability and low dielectric constant is an ideal candidate for aerospace industries, and microelectronic and other electronic packaging materials.
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Affiliation(s)
- Minjie Wu
- Hebei Key Laboratory of Functional Polymers, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China.
| | - Jianjun Xu
- Hebei Key Laboratory of Functional Polymers, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China.
| | - Shengnan Bai
- Hebei Key Laboratory of Functional Polymers, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China.
| | - Xinggang Chen
- Hebei Key Laboratory of Functional Polymers, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China.
| | - Xiaoyan Yu
- Hebei Key Laboratory of Functional Polymers, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China.
| | - Kimiyoshi Naito
- National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba 305-0047, Japan
| | - Zhenjiang Zhang
- College of Chemistry and Materials Science, Ludong University, Yantai, 264025, China
| | - Qingxin Zhang
- Hebei Key Laboratory of Functional Polymers, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China. and Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, Hebei University of Technology, Tianjin 300130, China
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Qi H, Wang X, Zhu T, Li J, Xiong L, Liu F. Low Dielectric Poly(imide siloxane) Films Enabled by a Well-Defined Disiloxane-Linked Alkyl Diamine. ACS OMEGA 2019; 4:22143-22151. [PMID: 31891096 PMCID: PMC6933767 DOI: 10.1021/acsomega.9b03302] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Accepted: 12/03/2019] [Indexed: 06/10/2023]
Abstract
This paper presents an efficient pathway to achieve the dielectric constant as low as 2.48 @ 25 °C, 1 MHz for nonporous poly(imide siloxane) films with mechanical and thermal robustness. A symmetric disiloxane-linked alkyl diamine, bis(aminopropyl)tetramethyldisiloxane (BATMS) with a well-defined molecular formula NH2CH2CH2CH2Si(CH3)2OSi(CH3)2CH2CH2CH2NH2, has been used to controllably reduce the dielectric constant of the polymer films by adjusting the loading of BATMS. The thermal stability of all the polymer films remains robust with T 5 and T 10 no less than 458 and 472 °C, respectively, while the glass-transition temperature decreases with increasing incorporation of flexible disiloxane-alkyl segments into a polymer backbone. There exists a consistent regularity between the thermal, optical, and dielectric properties with the loading amount of BATMS in the polymer films, inferring that the disiloxane-alkyl segments are homogeneously distributed in the polymer backbone. Charge-transfer complex inhibition of polymer films by disiloxane segments has been revealed by an enlarged d-spacing in wide-angle X-ray diffraction spectra and a blue shift in film fluorescence emission spectra. The combined low dielectric constant, robust mechanical and thermal stability, and improved hydrophobicity make the series of BATMS-resulting poly(imide siloxane) films promising candidates for sophisticated flexible microelectronic application.
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Affiliation(s)
- Haixia Qi
- College of Chemistry, Nanchang
University, 999 Xuefu Avenue, Honggutan New District, Nanchang 330031, PR China
| | - Xiulong Wang
- College of Chemistry, Nanchang
University, 999 Xuefu Avenue, Honggutan New District, Nanchang 330031, PR China
| | - Tangsong Zhu
- College of Chemistry, Nanchang
University, 999 Xuefu Avenue, Honggutan New District, Nanchang 330031, PR China
| | - Juan Li
- College of Chemistry, Nanchang
University, 999 Xuefu Avenue, Honggutan New District, Nanchang 330031, PR China
| | - Lei Xiong
- College of Chemistry, Nanchang
University, 999 Xuefu Avenue, Honggutan New District, Nanchang 330031, PR China
| | - Feng Liu
- College of Chemistry, Nanchang
University, 999 Xuefu Avenue, Honggutan New District, Nanchang 330031, PR China
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31
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Liu B, Zhang B, Wang X, Chen X, Gu G. The preparation and properties of polyimide films modified by octa(aminopropylsilsesquioxane). JOURNAL OF SAUDI CHEMICAL SOCIETY 2019. [DOI: 10.1016/j.jscs.2019.02.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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32
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Effects of Diamines on the Optical Properties of Poly(ether imide)s Derived from 2,2-Bis[4-(3,4-dicarboxyphenoxy)phenyl]propane Dianhydride (BPADA). Macromol Res 2019. [DOI: 10.1007/s13233-019-7117-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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33
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Belov N, Chatterjee R, Nikiforov R, Ryzhikh V, Bisoi S, Kumar A, Banerjee S, Yampolskii Y. New poly(ether imide)s with pendant di-tert-butyl groups: Synthesis, characterization and gas transport properties. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2019.02.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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34
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Wang ZH, Yang HX, Yang SY. Quartz fiber cloth-reinforced semi-aromatic thermosetting polyimide composite with high-frequency low dielectric constant. HIGH PERFORM POLYM 2019. [DOI: 10.1177/0954008319853028] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
We report a series of semi-aromatic thermosetting polyimide (PI) resins that can be used as matrix for copper-clad laminates for high-frequency applications. The poly(amic ester) (PAE) resins derived from the diester of 1,2,4,5-cyclohexanetetracarboxylic dianhydride, aromatic diamines (the mixture of 2,2′-dimethylbenzidine and 2,2′-bis[4-(4-aminophenoxy) phenyl] propane), and the monoester of nadic anhydride were synthesized by Polymerization of Monomer Reactants (PMR) method. The structure conversion of PAE resins at different temperatures was investigated and the B-stage PI powders prepared by thermally baking the PAE resins at 220°C are nearly fully imidized. The viscosities of the B-stage PI powders and the mechanical and thermal properties of the cured PI resins were optimized by varying the molar ratio of the two diamines. The cured PI resins possess low and steady dielectric constants ( Dk) below 3.0 and dielectric dissipation factors ( Df) of less than 0.01 at high frequency of 1–12 GHz. Furthermore, the quartz fiber cloth-reinforced semi-aromatic thermosetting PI composites (QF/PI) exhibit excellent dielectric performance, good heat resistance, and mechanical properties. At a high frequency of 1–12 GHz, the Dk of QF/PI-4 is stable in the range of 3.16–3.2, and the Df is stable in the range of 0.0026–0.0046. These results suggest the potential of the semi-aromatic QF/PI for use in high-frequency IC boards.
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Affiliation(s)
- Zhen-he Wang
- Laboratory of Advanced Polymer Materials, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun, Beijing, China
- University of Chinese Academy of Science, Beijing, China
| | - Hai-xia Yang
- Laboratory of Advanced Polymer Materials, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun, Beijing, China
| | - Shi-yong Yang
- Laboratory of Advanced Polymer Materials, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun, Beijing, China
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Li X, Lei H, Guo J, Wang J, Qi S, Tian G, Wu D. Composition design and properties investigation of BPDA/PDA/TFDB co‐polyimide films with low dielectric permittivity. J Appl Polym Sci 2019. [DOI: 10.1002/app.47989] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xiaolan Li
- State Key Laboratory of Chemical Resource EngineeringBeijing University of Chemical Technology Beijing 100029 China
| | - Huanyu Lei
- State Key Laboratory of Chemical Resource EngineeringBeijing University of Chemical Technology Beijing 100029 China
| | - Jiacong Guo
- State Key Laboratory of Chemical Resource EngineeringBeijing University of Chemical Technology Beijing 100029 China
| | - Jianhua Wang
- State Key Laboratory of Chemical Resource EngineeringBeijing University of Chemical Technology Beijing 100029 China
| | - Shengli Qi
- State Key Laboratory of Chemical Resource EngineeringBeijing University of Chemical Technology Beijing 100029 China
| | - Guofeng Tian
- State Key Laboratory of Chemical Resource EngineeringBeijing University of Chemical Technology Beijing 100029 China
| | - Dezhen Wu
- State Key Laboratory of Chemical Resource EngineeringBeijing University of Chemical Technology Beijing 100029 China
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36
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Liu YW, Tang LS, Qu LJ, Liu SW, Chi ZG, Zhang Y, Xu JR. Synthesis and Properties of High Performance Functional Polyimides Containing Rigid Nonplanar Conjugated Fluorene Moieties. CHINESE JOURNAL OF POLYMER SCIENCE 2019. [DOI: 10.1007/s10118-019-2225-0] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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37
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Oh N, Nam KH, Goh M, Ku BC, Kim JG, You NH. Synthesis of colorless and highly refractive Poly(phenylene thioether ether) derived from 2,7-(4,4′-diphenol)thiothianthrene. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.01.033] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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38
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Zhang XL, Sheng SR, Pan Y, Huang ZZ, Liu XL. Organosoluble, low dielectric constant and highly transparent fluorinated pyridine-containing poly(ether imide)s derived from new diamine: 4-(4-trifluoromethyl)phenyl-2,6-bis[4-(4-amino-2-trifluoromethylphenoxy)phenyl]pyridine. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2019. [DOI: 10.1080/10601325.2019.1565545] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Xiao-Lan Zhang
- Key Laboratory of Functional Small Organic Molecule of Ministry of Education, Jiangxi Normal University, Nanchang, P. R. China
| | - Shou-Ri Sheng
- Key Laboratory of Functional Small Organic Molecule of Ministry of Education, Jiangxi Normal University, Nanchang, P. R. China
| | - Yang Pan
- Key Laboratory of Functional Small Organic Molecule of Ministry of Education, Jiangxi Normal University, Nanchang, P. R. China
| | - Zhen-Zhong Huang
- Key Laboratory of Functional Small Organic Molecule of Ministry of Education, Jiangxi Normal University, Nanchang, P. R. China
| | - Xiao-Ling Liu
- Key Laboratory of Functional Small Organic Molecule of Ministry of Education, Jiangxi Normal University, Nanchang, P. R. China
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39
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Zhou H, Lei H, Wang J, Qi S, Tian G, Wu D. Breaking the mutual restraint between low permittivity and low thermal expansion in polyimide films via a branched crosslink structure. POLYMER 2019. [DOI: 10.1016/j.polymer.2018.12.033] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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40
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Purushothaman R, Vaitinadin HS. Incorporation of COF‐LZU‐1 into the terpolyimide matrix to obtain COF‐LZU‐1/terpolyimide composites with ultra‐low dielectric constant. POLYM ENG SCI 2018. [DOI: 10.1002/pen.25015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Revathi Purushothaman
- Department of Chemistry, B.S. Abdur Rahman Crescent Institute of Science and Technology Chennai 600 048 Tamil Nadu India
| | - Hari Shankar Vaitinadin
- Department of Polymer Engineering, B.S. Abdur Rahman Crescent Institute of Science and Technology Chennai 600 048 Tamil Nadu India
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41
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Lv P, Dong Z, Dai X, Qiu X. High-T
g
porous polyimide films with low dielectric constant derived from spiro-(adamantane-2,9′(2′,7′-diamino)-fluorene). J Appl Polym Sci 2018. [DOI: 10.1002/app.47313] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Pengxia Lv
- Polymer Composites Engineering Laboratory; Changchun Institute of Applied Chemistry, Chinese Academy of Sciences; Changchun 130022 People's Republic of China
- University of Chinese Academy of Sciences; Beijing 100049 People's Republic of China
| | - Zhixin Dong
- Polymer Composites Engineering Laboratory; Changchun Institute of Applied Chemistry, Chinese Academy of Sciences; Changchun 130022 People's Republic of China
| | - Xuemin Dai
- Polymer Composites Engineering Laboratory; Changchun Institute of Applied Chemistry, Chinese Academy of Sciences; Changchun 130022 People's Republic of China
| | - Xuepeng Qiu
- Polymer Composites Engineering Laboratory; Changchun Institute of Applied Chemistry, Chinese Academy of Sciences; Changchun 130022 People's Republic of China
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Chatterjee R, Bisoi S, Kumar AG, Padmanabhan V, Banerjee S. Polyimides Containing Phosphaphenanthrene Skeleton: Gas-Transport Properties and Molecular Dynamics Simulations. ACS OMEGA 2018; 3:13510-13523. [PMID: 31458058 PMCID: PMC6644473 DOI: 10.1021/acsomega.8b01364] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 09/28/2018] [Indexed: 06/01/2023]
Abstract
A series of new semifluorinated polyimide (PI) films with phosphaphenanthrene skeleton were prepared by thermal imidization of poly(amic acid)s derived from a diamine monomer: 1,1-bis[2'-trifluoromethyl-4'-(4″-aminophenyl)phenoxy]-1-(6-oxido-6H-dibenz⟨c,e⟩⟨1,2⟩oxaphosphorin-6-yl)ethane on reaction with four structurally different aromatic dianhydrides. The chemical structures of the polymers were established by Fourier transform infrared and 1H NMR spectroscopy techniques. The polymers showed a good combination of thermal and mechanical properties (T d10 up to 416 °C under synthetic air and tensile strength up to 91 MPa), low dielectric constant (2.10-2.55 at 1 MHz), and T g values as high as 261 °C. Gas permeabilities of these films were investigated for four different gases CO2, O2, N2, and CH4. The PI films showed high gas permeability (P CO2 up to 175 and P O2 up to 64 barrer) with high permselectivity (P CO2 /P CH4 up to 51 and P O2 /P N2 up to 7.1), and the values are better than those of many other similar polymers reported earlier. For the O2/N2 gas pair, the PIs (PI A) surpassed the present upper boundary limit drawn by Robeson. A detailed molecular dynamics (MD) simulation study has been conducted to understand better the gas-transport properties. The effect of phosphaphenanthrene skeleton, its spatial arrangement, and size distribution function of the free volume were studied using molecular dynamics (MD) simulation and the results are correlated with the experimental data.
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Affiliation(s)
- Rimpa Chatterjee
- Materials
Science Centre, Indian Institute of Technology
Kharagpur, Kharagpur 721302, India
| | - Soumendu Bisoi
- Materials
Science Centre, Indian Institute of Technology
Kharagpur, Kharagpur 721302, India
| | - Anaparthi Ganesh Kumar
- Materials
Science Centre, Indian Institute of Technology
Kharagpur, Kharagpur 721302, India
| | - Venkat Padmanabhan
- Department
of Chemical Engineering, Tennessee Technological
University, Cookeville, Tennessee 38505, United States
| | - Susanta Banerjee
- Materials
Science Centre, Indian Institute of Technology
Kharagpur, Kharagpur 721302, India
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Polyimide derivatives of 4,4ʹ-bis((4-aminophenoxy)methyl)-1,1ʹ-biphenyl: Synthesis, spectroscopic characterization, single crystal XRD and thermal studies. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.05.051] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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44
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Zhang XL, Liu XL, Wang QY, Huang ZZ, Sheng SR. Synthesis and characterization of novel fluorinated poly(ether imide)s containing pyridine and/or phenylphosphine oxide moieties. HIGH PERFORM POLYM 2018. [DOI: 10.1177/0954008318801905] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
4-(4-Trifluoromethylphenyl)-2,6-bis[4-(4-amino-2-trifluoromethylphenoxy)phenyl]pyridine (9FPBAPP), as a new aromatic diamine, was prepared by a modified Chichibabin reaction of 4-(4-nitro-2-trifluoromethylphenoxy)acetophenone with 4-triflouromethylbenzaldehyde, followed by a catalytic reduction. A series of fluorinated poly(ether imide)s containing pyridine and/or phenylphosphine oxide moieties were prepared from bis(3-aminophenyl)phenylphosphine oxide (BAPPO), 2,2′-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride (6FDA), and 9FPBAPP via a conventional two-step thermal imidization procedure with various mole ratios of BAPPO and 9FPBAPP. All the polymers were amorphous and soluble in common organic solvents such as N, N-dimethylacetamide and N-methyl-2-pyrrolidone and had Tg’s of 277–285°C, 5% weight loss temperature of 521–550°C in nitrogen. Furthermore, high char yields and good limited oxygen index values indicated that these polymers exhibited good thermal stability and flame-retardant property. Tough and flexible polymer films also had good mechanical properties with tensile strengths of 75–99 MPa, tensile moduli of 1.1–1.6 GPa, and elongations at break of 12%–24% and low dielectric constants of 2.81–3.53 (1 MHz), as well as high optical transparency with the ultraviolet cutoff wavelength in the range of 350–384 nm.
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Affiliation(s)
- Xiao-Lan Zhang
- Key Laboratory of Functional Small Organic Molecule of Ministry of Education, Jiangxi Normal University, Nanchang Jiangxi, China
- College of Chemistry and Chemical Engineering, Shangrao Normal University, Shangrao Jiangxi, China
| | - Xiao-Ling Liu
- Key Laboratory of Functional Small Organic Molecule of Ministry of Education, Jiangxi Normal University, Nanchang Jiangxi, China
| | - Qiu-Ying Wang
- Key Laboratory of Functional Small Organic Molecule of Ministry of Education, Jiangxi Normal University, Nanchang Jiangxi, China
| | - Zhen-Zhong Huang
- Key Laboratory of Functional Small Organic Molecule of Ministry of Education, Jiangxi Normal University, Nanchang Jiangxi, China
| | - Shou-Ri Sheng
- Key Laboratory of Functional Small Organic Molecule of Ministry of Education, Jiangxi Normal University, Nanchang Jiangxi, China
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45
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Ma Y, Hu C, Guo H, Fan L, Yang S, Sun WH. Structure effect on transition mechanism of UV–visible absorption spectrum in polyimides: A density functional theory study. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.06.049] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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46
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Preparation, characterization and degradation kinetics of transparent fluorinated polyimides with low dielectric constants and excellent hydrophobic properties. Polym Bull (Berl) 2018. [DOI: 10.1007/s00289-018-2352-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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47
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Ashraf AR, Akhter Z, Simon LC, McKee V, Castel CD. Synthesis of polyimides from α,αʹ-bis(3-aminophenoxy)-p-xylene: Spectroscopic, single crystal XRD and thermal studies. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.01.098] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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48
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Cao K, Zhang M, Liu G. The Effect of End Group and Molecular Weight on the Yellowness of Polyetherimide. Macromol Rapid Commun 2018; 39:e1800045. [PMID: 29656486 DOI: 10.1002/marc.201800045] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 02/25/2018] [Indexed: 11/07/2022]
Abstract
The effects of end group and molecular weight on the yellowness of telechelic polyetherimide (PEI) are investigated. Electron-withdrawing dianhydride end groups reduce the yellowness and increase the transparency of PEI regardless of the molecular weight. Electron-donating phenyl, amine, and phthalic end groups increase the yellowness of PEI but the effect depends on the molecular weight. As the molecular weight is increased, the yellowness of PEIs with electron-donating end groups initially decreases due to a decreasing end-group density and then increases due to an increasing probability of charge-transfer complex formation. The systematic study reveals the correlations among yellowness, end group, and molecular weight of PEIs. The correlations can be used for designing highly transparent PEIs and other high-performance polymers.
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Affiliation(s)
- Ke Cao
- Macromolecules Innovation Institute (MII), Department of Chemistry, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Mingxuan Zhang
- Macromolecules Innovation Institute (MII), Department of Chemistry, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Guoliang Liu
- Macromolecules Innovation Institute (MII), Department of Chemistry, Virginia Tech, Blacksburg, VA, 24061, USA
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49
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High performance fluorinated Bismaleimide-Triazine resin with excellent dielectric properties. JOURNAL OF POLYMER RESEARCH 2017. [DOI: 10.1007/s10965-017-1407-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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50
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Tan W, Dong J, Li Z, Zhang D, Zhao X, Zhang Q. Synthesis of organosoluble copolyimide and preparation of fibers by dry-spinning process on a large scale. HIGH PERFORM POLYM 2017. [DOI: 10.1177/0954008317744868] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
An organosoluble copolyimide (co-PI) was synthesized from 3,3′,4,4′-benzophenonetetracarboxylic dianhydride (BTDA), 1,4-bis-(4-aimino-2-triflupromethyl-phenoxy)-benzene ( p-6FAPB), and 2-(4-aminophenyl)-5-aminobenzimidazole (BIA) via the one-step polymerization using N-methyl-2-pyrrolidone (NMP) as the solvent, and high-performance co-PI fibers were directly prepared by the dry-spinning process on a large scale. Scanning electron microscopic images show that all formulations of as-spun fibers exhibit elliptical cross sections as well as dense morphologies. The structural evolution of the co-PI fiber induced by the high rolling speed and post-heat-drawing treatment was studied by means of thermogravimetric analysis, dynamic thermomechanical analysis, and two-dimensional wide-angle X-ray diffraction (2D WAXD). With increasing rolling speeds, glass transition temperatures ( Tgs) and thermal stabilities of as-spun fibers slightly decrease, which may be resulted from the disentanglement of entangled molecular chains under the large deformation and high-temperature heating atmosphere in the spinning column. 2D WAXD data indicate that both increasing rolling speeds and post-heat-drawing treatment are beneficial for getting a highly ordered structure along the meridian direction of the fibers. The fibers treated at 430°C exhibit outstanding mechanical properties, and the tensile strength and modulus reach 1.44 GPa and 48.69 GPa, respectively, at a drawing ratio of 2.8.
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Affiliation(s)
- Wenjun Tan
- Key Laboratory of High-Performance Fiber and Product, Ministry of Education, Shanghai, China
- College of Materials Science and Engineering, Donghua University, Shanghai, China
| | - Jie Dong
- Key Laboratory of High-Performance Fiber and Product, Ministry of Education, Shanghai, China
- College of Materials Science and Engineering, Donghua University, Shanghai, China
| | - Zhentao Li
- Key Laboratory of High-Performance Fiber and Product, Ministry of Education, Shanghai, China
- College of Materials Science and Engineering, Donghua University, Shanghai, China
| | - Dianbo Zhang
- Key Laboratory of High-Performance Fiber and Product, Ministry of Education, Shanghai, China
- College of Materials Science and Engineering, Donghua University, Shanghai, China
| | - Xin Zhao
- Key Laboratory of High-Performance Fiber and Product, Ministry of Education, Shanghai, China
- College of Materials Science and Engineering, Donghua University, Shanghai, China
| | - Qinghua Zhang
- Key Laboratory of High-Performance Fiber and Product, Ministry of Education, Shanghai, China
- College of Materials Science and Engineering, Donghua University, Shanghai, China
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