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Park H, Choi H, Kim J, Yoo S, Mun HJ, Shin TJ, Won JC, Kim HY, Kim YH. Density Functional Theory-Based Approach For Dielectric Constant Estimation of Soluble Polyimide Insulators. J Phys Chem B 2024. [PMID: 38422507 DOI: 10.1021/acs.jpcb.3c07296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
Evaluation of the insulating properties of polymers, such as the dielectric constant and dissipation factor, is crucial in electronic devices, including field-effect transistors and wireless communication applications. This study applies density functional theory (DFT) to predict the dielectric constant of soluble polyimides (SPIs). Various SPIs containing trifluoromethyl groups in the backbone with different pendant types, numbers, and symmetries are successfully synthesized, and their dielectric constants are evaluated and compared with the DFT-estimated values. Two types of DFT-optimized SPIs, single-chain and stacked-chain models, are used to describe the local geometries of the SPIs. In addition, to reveal the relationship between the molecular structure and dielectric constant, further investigations are conducted by considering the dielectric constant of composing ionic and electronic components. The DFT-estimated static dielectric constant of the single-chain model accurately reproduces the corresponding experimental value with at least 80% accuracy. Our approach provides a rational and accelerated strategy to evaluate polymer insulators for electronic devices based on cost-effective DFT calculations.
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Affiliation(s)
- Hyunjin Park
- Chemical Materials Solutions Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea
| | - Hyuk Choi
- Department of Materials Science and Engineering, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Jongseok Kim
- Department of Materials Science and Engineering, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Sungmi Yoo
- Chemical Materials Solutions Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea
| | - Hyun Jung Mun
- UNIST Central Research Facilities & School of Natural Science, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Tae Joo Shin
- UNIST Central Research Facilities & School of Natural Science, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Jong Chan Won
- Advanced Functional Polymers Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea
- KRICT School, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - Hyun You Kim
- Department of Materials Science and Engineering, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Yun Ho Kim
- Advanced Functional Polymers Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea
- KRICT School, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
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2
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Huang S, Lv X, Zhang Y, Qiu S, Li J, Yin H, Zhang G, Sun R. Exploring the Impact of Blend and Graft of Quinoline Derivative in Low-Temperature Curable Polyimides. Macromol Rapid Commun 2023; 44:e2300374. [PMID: 37616581 DOI: 10.1002/marc.202300374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 07/29/2023] [Indexed: 08/26/2023]
Abstract
The utilization of accelerators has been a common approach to prepare low-temperature curable polyimide (PI). However, the accelerators have gradually fallen out of favor because of their excessive dosages and negative effect on the properties of PI. In this work, a new strategy of introducing accelerators by grafting to eliminate these disadvantages is presented. A novel quinoline derivative named 6-([1,1'-biphenyl]-4-yl)-4-chloroquinoline (NQL) is designed for this purpose, and an ultralow dosage of only 2.5 mol% is sufficient to prepare low-temperature curable PI. The favorable low-temperature curing effect of NQL is attributed to its strong alkalinity (pKa = 18.47) and electron-donating ability. At a curing temperature of 200 °C, the PI with 2.5 mol% NQL showed outstanding properties (Young's modulus of 5.73 GPa, elongation of 37.3%, tensile strength of 237 MPa, and coefficient of thermal expansion of 16 ppm K-1 ). In particular, NQL can even lower the curing temperature to 180 °C and the ultralow temperature curable PI film still retains excellent properties. These results demonstrate that introducing low-temperature curable accelerators by partial grafting instead of blending is a promising way to furnish low-temperature curable PI, and provide insights into the preparation of polyimide with high performance in advanced packaging.
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Affiliation(s)
- Shan Huang
- Shenzhen International Innovation Institutes of Advanced Electronic Materials, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China
- Department of Nano Science and Technology Institute, University of Science and Technology of China, Suzhou, 215123, China
| | - Xialei Lv
- Shenzhen International Innovation Institutes of Advanced Electronic Materials, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China
| | - Yao Zhang
- Shenzhen International Innovation Institutes of Advanced Electronic Materials, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China
| | - Siyao Qiu
- Shenzhen International Innovation Institutes of Advanced Electronic Materials, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China
| | - Jinhui Li
- Shenzhen International Innovation Institutes of Advanced Electronic Materials, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China
| | - Huiming Yin
- Shenzhen International Innovation Institutes of Advanced Electronic Materials, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China
| | - Guoping Zhang
- Shenzhen International Innovation Institutes of Advanced Electronic Materials, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China
| | - Rong Sun
- Shenzhen International Innovation Institutes of Advanced Electronic Materials, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China
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3
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Jiang X, Chen K, Li C, Long Y, Liu S, Chi Z, Xu J, Zhang Y. Ultralow Coefficient of Thermal Expansion and a High Colorless Transparent Polyimide Film Realized Through a Reinforced Hydrogen-Bond Network by In Situ Polymerization of Aromatic Polyamide in Colorless Polyimide. ACS APPLIED MATERIALS & INTERFACES 2023; 15:41793-41805. [PMID: 37616220 DOI: 10.1021/acsami.3c05664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/26/2023]
Abstract
Colorless polyimides (CPIs) are a key substrate material for flexible organic light-emitting diode (OLED) displays and have attracted worldwide attention. Here, in this paper, the dispersion and interfacial interaction of aromatic polyamide (PA) in CPI (synthesized from 4,4'-(hexafluoroisopropylidene) diphthalic anhydride (6FDA) and 2,2'-bis(trifluoromethyl)benzidine (TFMB)) were significantly improved by in situ polymerization, and colorless transparent macromolecular polyimide composites (CPI-PAx) were successfully prepared by PA and CPI. By adjusting the ratio of PA to CPI, a high-performance engineering plastic with excellent film-forming properties was obtained. Molecular simulations confirmed the uniform distribution of PA in CPI and its interaction in polymers. In CPI-PAx, the CPI was locked by the PA chain, and numerous molecular chains were mutually entangled to form a hydrogen-bond network structure. Due to the strong interaction between the chains imparted by the hydrogen bonds of the PA, they do not slide under external forces and heating. In addition, the additive PA has excellent dimensional stability, thermal, and mechanical properties, and CPI has outstanding optical properties, so the synthesized CPI-PAx combines the comprehensive properties of PA and CPI. The CPI-PAx has excellent thermal and mechanical properties, with a thermal decomposition temperature of 499 °C, a glass transition temperature of 385 °C, a coefficient of thermal expansion of 0.8 ppm K-1, a tensile strength of 50.9 MPa, and an elastic modulus of 3.9 GPa. Particularly, CPI-PAx has a 90% transmittance in the visible region. These data prove that the strategy of combining PA and CPI by in situ polymerization is an effective method to circumvent the bottleneck of CPI in the current flexible window application, and this design strategy is universal.
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Affiliation(s)
- Xueshuang Jiang
- PCFM Lab, GD HPPC Lab, Guangdong Engineering Technology Research Centre for High-Performance Organic and Polymer Photoelectric Functional Films, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, Sun Yat-sen University, Guangzhou510275, China
| | - Kaijin Chen
- PCFM Lab, GD HPPC Lab, Guangdong Engineering Technology Research Centre for High-Performance Organic and Polymer Photoelectric Functional Films, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, Sun Yat-sen University, Guangzhou510275, China
| | - Chuying Li
- PCFM Lab, GD HPPC Lab, Guangdong Engineering Technology Research Centre for High-Performance Organic and Polymer Photoelectric Functional Films, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, Sun Yat-sen University, Guangzhou510275, China
| | - Yubo Long
- PCFM Lab, GD HPPC Lab, Guangdong Engineering Technology Research Centre for High-Performance Organic and Polymer Photoelectric Functional Films, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, Sun Yat-sen University, Guangzhou510275, China
| | - Siwei Liu
- PCFM Lab, GD HPPC Lab, Guangdong Engineering Technology Research Centre for High-Performance Organic and Polymer Photoelectric Functional Films, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, Sun Yat-sen University, Guangzhou510275, China
| | - Zhenguo Chi
- PCFM Lab, GD HPPC Lab, Guangdong Engineering Technology Research Centre for High-Performance Organic and Polymer Photoelectric Functional Films, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, Sun Yat-sen University, Guangzhou510275, China
| | - Jiarui Xu
- PCFM Lab, GD HPPC Lab, Guangdong Engineering Technology Research Centre for High-Performance Organic and Polymer Photoelectric Functional Films, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, Sun Yat-sen University, Guangzhou510275, China
| | - Yi Zhang
- PCFM Lab, GD HPPC Lab, Guangdong Engineering Technology Research Centre for High-Performance Organic and Polymer Photoelectric Functional Films, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, Sun Yat-sen University, Guangzhou510275, China
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4
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Xia X, He X, Zhang S, Zheng F, Lu Q. Short-Side-Chain Regulation of Colorless and Transparent Polyamide-Imides for Flexible Transparent Displays. Eur Polym J 2023. [DOI: 10.1016/j.eurpolymj.2023.112030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
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5
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Chen G, Xu G, Jiao Y, Tang Y, Tan L, Fang X. Cardo polyimides with high Tg and transparency derived from bisphenol fluorenes and 1,4-bis(4-fluorophthalimide)cyclohexanes via aromatic nucleophilic substitution. Eur Polym J 2023. [DOI: 10.1016/j.eurpolymj.2023.111911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
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6
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High-Transparency and Colorless Polyimide Film Prepared by Inhibiting the Formation of Chromophores. Polymers (Basel) 2022; 14:polym14194242. [PMID: 36236190 PMCID: PMC9571026 DOI: 10.3390/polym14194242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 08/31/2022] [Accepted: 09/08/2022] [Indexed: 11/17/2022] Open
Abstract
Colorless polyimides (CPIs) with outstanding mechanical properties are essential materials in the production of flexible display panels, foldable windows, and even spacecraft cockpits. This paper specifically elaborates that the Morkit unit, and azo and nitro chromophores are important factors contributing to yellow PI, together with the well-known charge transfer complex (CTC) theory. Three diamine monomers, two anhydrides monomers, and three blockers were used to inhibit chromophores formation and, thus, obtain CPI films. The cut-off wavelength was blue-shifts to 334 nm and the transmittance is improved to 98.9% in the UV–vis range. Mechanical and thermal properties of the CPI films are not reduced through coupling effects of the blockers. Therefore, the inhibition method of the Morkit units and chromophore groups is a promising process for preparing CPIs to be used as flexible display materials.
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Wang Y, Liu X, Shen J, Zhao J, Tu G. Synthesis of a Novel Rigid Semi-Alicyclic Dianhydride and Its Copolymerized Transparent Polyimide Films' Properties. Polymers (Basel) 2022; 14:polym14194132. [PMID: 36236080 PMCID: PMC9571554 DOI: 10.3390/polym14194132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 09/27/2022] [Accepted: 09/28/2022] [Indexed: 11/07/2022] Open
Abstract
A new series of colorless polyimides (CPIs) with outstanding thermal properties and mechanical properties were fabricated by the copolymerization of a novel dianhydride and 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) with 2,2′-bistrifluoromethyl benzidine (TFDB). The novel dianhydride, 10-oxo-9-phenyl-9-(trifluoromethyl)-9,10-dihydroanthracene-2,3,6,7-tetraacid dianhydride (3FPODA), possessed a rigid semi-alicyclic structure, –CF3 and phenyl side groups, and an active carbonyl group. Benefitting from the special structure of 3FPODA, the glass transition temperatures (Tg) of the new CPIs improved from 330 °C to 377 °C, the coefficient of thermal expansion (CTE) decreased from 46 ppm/K to 24 ppm/K, and the tensile strength (TS), tensile modulus (TM), and elongation at break (EB) increased from 84 MPa to 136 MPa, 3.2 GPa to 4.4 GPa, and 2.94% to 4.13% with the increasing amount of 3FPODA, respectively. Moreover, the active carbonyl group of the 3FPODA could enhance the CPI’s adhesive properties. These results render the new dianhydride 3FPODA an ideal candidate monomer for the fabrication of high-performance CPIs.
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8
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Xia X, Zhang S, He X, Zheng F, Lu Q. Molecular necklace strategy for enhancing modulus and toughness of colorless transparent polyimides for cover window application. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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9
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Ren X, Wang H, Du X, Qi H, Pan Z, Wang X, Dai S, Yang C, Liu J. Synthesis and Properties of Optically Transparent Fluoro-Containing Polyimide Films with Reduced Linear Coefficients of Thermal Expansion from Organo-Soluble Resins Derived from Aromatic Diamine with Benzanilide Units. MATERIALS (BASEL, SWITZERLAND) 2022; 15:6346. [PMID: 36143653 PMCID: PMC9501536 DOI: 10.3390/ma15186346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 09/12/2022] [Accepted: 09/13/2022] [Indexed: 06/16/2023]
Abstract
Wholly aromatic polyimide (PI) films with good solution processability, light colors, good optical transparency, high storage modulus, and improved heat resistance were prepared and characterized. For this purpose, a multi-component copolymerization methodology was performed from a fluoro-containing dianhydride, 4,4'-(hexafluoroisopropylidene)diphthalic anhydride (6FDA), a rigid dianhydride, 3,3',4,4'-biphenyltetracarboxylic dianhydride (BPDA), and a fluoro-containing diamine, 2,2'-bis(trifluoromethyl)-4,4'-bis [4-(4-amino-3-methyl)benzamide]biphenyl (MABTFMB). One homopolymer, FPI-1 (6FDA-MABTFMB), and five copolymers, FPI-2~FPI-6, containing the BPDA units from 10 mol% to 50 mol% in the dianhydride moieties, were prepared, respectively. The derived PI resins showed good solubility in the polar aprotic solvents, such as N-methyl-2-pyrrolidone (NMP) and N,N-dimethylacetamide (DMAc). The flexible PI films obtained by the solution casting procedure showed good optical properties with the transmittances higher than 74.0% at the wavelength of 450 nm. The PI films exhibited excellent thermal properties, including 5% weight loss temperatures (T5%) over 510 °C, together with glass transition temperatures (Tg) over 350.0 °C according to the peak temperatures of the loss modulus in dynamical mechanical analysis (DMA) measurements. The FPI-6 film also showed the lowest linear coefficient of thermal expansion (CTE) value of 23.4 × 10-6/K from 50 to 250 °C according to the thermomechanical analysis (TMA) measurements, which was obviously lower than that of FPI-1 (CTE = 30.6 × 10-6/K).
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Affiliation(s)
- Xi Ren
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
| | - Hanli Wang
- Shandong Huaxia Shenzhou New Material Co., Ltd., Zibo 256401, China
| | - Xuanzhe Du
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
| | - Haoran Qi
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
| | - Zhen Pan
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
| | - Xiaolei Wang
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
| | - Shengwei Dai
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
| | - Changxu Yang
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
| | - Jingang Liu
- School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
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10
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Orlova AM, Alentiev AY, Kolesnikov TI, Tsegelskaya AY, Monakhova KZ, Chirkov SV, Nikiforov RY, Abramov IG, Kuznetsov AA. Novel organo-soluble poly(ether imide)s based on diethyltoluenediamine: Synthesis, characterization and gas transport properties. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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11
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Liu X, Ma M, Li J, Gong C, Qiao Z, Huang F. Investigation of Poly(dimethylsilylene ethynylenealkylphenylenmethylenealkylphenyleneethynylene). POLYM-PLAST TECH MAT 2022. [DOI: 10.1080/25740881.2022.2039188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Affiliation(s)
- Xiaotian Liu
- Key Laboratory for Specially Functional Materials and Related Technology (Ministry of Education). School of Materials Science & Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Manping Ma
- Key Laboratory for Specially Functional Materials and Related Technology (Ministry of Education). School of Materials Science & Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Jixian Li
- Key Laboratory for Specially Functional Materials and Related Technology (Ministry of Education). School of Materials Science & Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Changjun Gong
- Key Laboratory for Specially Functional Materials and Related Technology (Ministry of Education). School of Materials Science & Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Zhiyao Qiao
- Key Laboratory for Specially Functional Materials and Related Technology (Ministry of Education). School of Materials Science & Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Farong Huang
- Key Laboratory for Specially Functional Materials and Related Technology (Ministry of Education). School of Materials Science & Engineering, East China University of Science and Technology, Shanghai, 200237, China
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12
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Liu Y, Wang Y, Wu D. Synthetic strategies for highly transparent and colorless polyimide film. J Appl Polym Sci 2022. [DOI: 10.1002/app.52604] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Yuan‐Yuan Liu
- Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing China
- School of Future Technology University of Chinese Academy of Sciences Beijing China
| | - Ya‐Kun Wang
- School of Foreign Studies China University of Political Science and Law Beijing China
| | - Da‐Yong Wu
- Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing China
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13
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Fluorine Substitution Effect on the Material Properties in Transparent Aromatic Polyimides. CHINESE JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1007/s10118-022-2702-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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14
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Xu W, Pan Y, Chen L, Su Y, Shang M, Lu X, Lu Q. Continuous microflow synthesis of dimethyl-substituted cyclobutanetetracarboxylic dianhydrides and its application on polyimide films. J Flow Chem 2022. [DOI: 10.1007/s41981-021-00192-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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15
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Yan X, Dai F, Ke Z, Yan K, Chen C, Qian G, Li H. Synthesis of colorless polyimides with high Tg from asymmetric twisted benzimidazole diamines. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2021.110975] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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16
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Xiao P, He X, zheng F, Lu Q. Super-heat resistant, transparent and low dielectric polyimides based on spirocyclic bisbenzoxazole diamines with Tg > 450°C. Polym Chem 2022. [DOI: 10.1039/d2py00513a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Maintaining ultra-high heat resistance and sufficient colorless transparency at the same time is a challenge for polymer materials because of conflicting design principles, but such materials are urgently needed for...
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17
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Peng W, Lei H, Qiu L, Bao F, Huang M. Perfluorocyclobutyl-containing transparent polyimides with low dielectric constant and low dielectric loss. Polym Chem 2022. [DOI: 10.1039/d2py00550f] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The combination of loose chain packing and high fluoro content endows PFCB-containing polyimides with excellent optical transparency and dielectric properties.
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Affiliation(s)
- Weifeng Peng
- South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, South China University of Technology, Guangzhou 510640, China
| | - Huanyu Lei
- South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, South China University of Technology, Guangzhou 510640, China
| | - Luhao Qiu
- South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, South China University of Technology, Guangzhou 510640, China
| | - Feng Bao
- South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, South China University of Technology, Guangzhou 510640, China
| | - Mingjun Huang
- South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, South China University of Technology, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, South China University of Technology, Guangzhou 510640, China
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18
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Zhong M, Wu X, Shu C, Wang Y, Huang X, Huang W. Organosoluble polyimides with low dielectric constant prepared from an asymmetric diamine containing bulky m-trifluoromethyl phenyl group. REACT FUNCT POLYM 2021. [DOI: 10.1016/j.reactfunctpolym.2021.105065] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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19
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Wu Y, Ji J, Huang H, Liu S, Zhao J. Facile synthesis of acyloxy-containing fluorene-based Cardo polyimides with high optical transparency, fluorescence and low dielectric constant. REACT FUNCT POLYM 2021. [DOI: 10.1016/j.reactfunctpolym.2021.104979] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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20
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Zheng H, Wang C, Ma Y, Tao Z, Zhao X, Li J, Ren Q. High thermal stability and low dielectric constant of soluble polyimides containing asymmetric bulky pendant groups. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2021. [DOI: 10.1080/10601325.2021.1964370] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Hui Zheng
- Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Changzhou University, Changzhou, China
| | - Chenyi Wang
- Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Changzhou University, Changzhou, China
| | - Yan Ma
- Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Changzhou University, Changzhou, China
| | - Zhengwang Tao
- Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Changzhou University, Changzhou, China
| | - Xiaoyan Zhao
- Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Changzhou University, Changzhou, China
| | - Jian Li
- Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Changzhou University, Changzhou, China
| | - Qiang Ren
- Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Changzhou University, Changzhou, China
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21
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Clarifying the effect of moisture absorption and high-temperature thermal aging on structure and properties of polyimide film at molecular dynamic level. POLYMER 2021. [DOI: 10.1016/j.polymer.2020.123251] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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22
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Bai W, Hu Z, Lu Y, Xiao G, Zhao H, Zhu J, Liu Z. Solubility, thermal and photoluminescence properties of triphenyl imidazole-containing polyimides. RSC Adv 2021; 11:23802-23814. [PMID: 35479826 PMCID: PMC9036536 DOI: 10.1039/d1ra02765d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 06/30/2021] [Indexed: 12/31/2022] Open
Abstract
In this paper, three kinds of triphenyl imidazole-containing diamines including 2-phenyl-4,5-bis(4-(4-amino-2-trifluoromethylphenoxy)phenyl)imidazole (PBAI), 2-(4-methylphenyl)-4,5-bis(4-(4-amino-2-trifluoromethyl phenoxy)phenyl)imidazole (MPBAI) and 2-(4-trifluoromethylphenyl)-4,5-bis(4-(4-amino-2-trifluoromethylphenoxy)phenyl)imidazole (TFPBAI) were synthesized. Then, a series of polyimide (PI) films were prepared by the solution polymerization of the three diamines and various dianhydrides, such as 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6FDA), 1,2,4,5-pyromellitic dianhydride (PMDA) and 1,2,3,4-cyclobutanetetracarboxylic dianhydride (CBDA), followed by thermal imidization. The effects of chemical structures on the solubilities and thermal, optical and electrochemical properties of polyimides were explored. All the polyimides exhibited higher glass transition temperatures around 300 °C and excellent solubilities in common polar solvents. The polyimide films derived from CBDA or 6FDA showed better optical properties with light color and transparent characteristics. The fluorescence test showed that the photoluminescence color of CBDA-based polyimide films is in the blue range in the CIE 1931 spectrum, while the polyimide film based on PMDA and 6FDA presented black or weak yellow light. However, all these polyimides in solution exhibited similar blue luminescence. Electrochemical tests indicated that the HOMO and LUMO values of these films were around −6.5 and −3.6 eV, and the energy gap difference was about 3.0 eV. Therefore, the triphenyl imidazole-containing polyimides exhibit comprehensive performance, which will be expected as a new kind of functional material for certain application in the optical and optoelectronics fields. The triphenyl imidazole-containing polyimide films exhibit excellent solubility and thermal and photoluminescence properties.![]()
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Affiliation(s)
- Wu Bai
- School of Chemical Engineering
- University of Science and Technology Liaoning
- Anshan
- P. R. China
| | - Zhizhi Hu
- School of Chemical Engineering
- University of Science and Technology Liaoning
- Anshan
- P. R. China
- Oxiranchem Holding Group Co. Ltd
| | - Yunhua Lu
- School of Chemical Engineering
- University of Science and Technology Liaoning
- Anshan
- P. R. China
| | - Guoyong Xiao
- School of Chemical Engineering
- University of Science and Technology Liaoning
- Anshan
- P. R. China
| | - Hongbin Zhao
- School of Chemical Engineering
- University of Science and Technology Liaoning
- Anshan
- P. R. China
- Oxiranchem Holding Group Co. Ltd
| | - Jianmin Zhu
- Oxiranchem Holding Group Co. Ltd
- Liaoyang
- P. R. China
| | - Zhaobin Liu
- Oxiranchem Holding Group Co. Ltd
- Liaoyang
- P. R. China
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Ma S, Wang S, Jin S, Wang Y, Yao J, Zhao X, Chen C. Construction of high-performance, high-temperature shape memory polyimides bearing pyridine and trifluoromethyl group. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122972] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Lin D, Liu Y, Jia Z, Qi S, Wu D. Structural Evolution of Macromolecular Chain During Pre-imidization Process and Its Effects on Polyimide Film Properties. J Phys Chem B 2020; 124:7969-7978. [PMID: 32804503 DOI: 10.1021/acs.jpcb.0c05146] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Pre-imidization has been found to have a determining role on the final properties of polyimide (PI) films. In this work, a series of 4,4'-(hexafluoroisopropylidene)diphthalic anhydride (6FDA)/2,2'-bis(trifluoromethyl)benzidine (TFMB) PI models with specified pre-imidization degree (pre-ID) were constructed and analyzed on the basis of molecular dynamic (MD) simulation to reveal the real-time evolution of structure and properties that occurred during the pre-imidization process. The MD results indicated that the Tg of the models increased obviously with increasing pre-ID, which corresponded to the increase of rigid PI chain segments that restricted the mobility of molecular chains. In addition, the increase of fractional free volume and mean square end-to-end distance indicated looser chain packing and more extended chain conformation during the pre-imidization process. As a further verification, a series of corresponding PI films were experimentally prepared via a controlled partially pre-imidization process. Mechanical properties of the prepared PI films were tested to be significantly enhanced, and the coefficient of thermal expansion decreased from 61.5 to 47.6 ppm/°C with pre-ID increasing from 0% to 100%, which could be attributed to the orderly molecular chain arrangement formed during the chemical pre-imidization process, as disclosed by MD simulation. This work paves the way for the observation of the real-time structure and property evolutions of PI materials, especially during the pre-imidization process.
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Affiliation(s)
- Daolei Lin
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Yingzi Liu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Ziqi Jia
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Shengli Qi
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.,Changzhou Institute of Advanced Materials, Beijing University of Chemical Technology, Changzhou 213164 Jiangsu, China
| | - Dezhen Wu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.,Changzhou Institute of Advanced Materials, Beijing University of Chemical Technology, Changzhou 213164 Jiangsu, China
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Synthesis and characterization of a novel organo-soluble polyimide containing hydroxyl and bis-tert-butyl substituted triphenylpyridine units. JOURNAL OF POLYMER RESEARCH 2020. [DOI: 10.1007/s10965-020-02208-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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New Poly(imide)s Bearing Alkyl Side-Chains: A Study on the Impact of Size and Shape of Lateral Groups on Thermal, Mechanical, and Gas Transport Properties. MEMBRANES 2020; 10:membranes10070141. [PMID: 32635517 PMCID: PMC7407386 DOI: 10.3390/membranes10070141] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 06/24/2020] [Accepted: 07/01/2020] [Indexed: 11/23/2022]
Abstract
A set of five new aromatic poly(imide)s (PIs) incorporating pendant acyclic alkyl moieties were synthesized. The difference among them was the length and bulkiness of the pendant group, which comprises of linear alkyl chains from three to six carbon atoms, and a tert-butyl moiety. The effect of the side group length on the physical, thermal, mechanical, and gas transport properties was analyzed. All PIs exhibited low to moderate molecular weights (Mn ranged between 27.930–58.970 Da, and Mw ranged between 41.760–81.310 Da), good solubility in aprotic polar solvents, except for PI-t-4, which had a tert-butyl moiety and was soluble even in chloroform. This behaviour was probably due to the most significant bulkiness of the side group that increased the interchain distance, which was corroborated by the X-ray technique (PI-t-4 showed two d-spacing values: 5.1 and 14.3 Å). Pure gas permeabilities for several gases were reported (PI-3 (Barrer): He(52); H2(46); O2(5.4); N2(1.2); CH4(1.1); CO2(23); PI-t-4 (Barrer): He(139); H2(136); O2(16.7); N2(3.3); CH4(2.3); CO2(75); PI-5 (Barrer): He(44); H2(42); O2(5.9); N2(1.4); CH4(1.2); CO2(27); PI-6 (Barrer): He(45); H2(43); O2(6.7); N2(1.7); CH4(1.7); CO2(32)). Consistent higher volume in the side group was shown to yield the highest gas permeability. All poly(imide)s exhibited high thermal stability with 10% weight loss degradation temperature between 448–468 °C and glass transition temperature between 240–270 °C. The values associated to the tensile strength (45–87 MPa), elongation at break (3.2–11.98%), and tensile modulus (1.43–2.19 GPa) were those expected for aromatic poly(imide)s.
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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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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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