1
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Fang Y, Lu X, Xiao J, Zhang SY, Lu Q. Thermally Stable and Transparent Polyimide Derived from Side-Group-Regulated Spirobifluorene Unit for Substrate Application. Macromol Rapid Commun 2024:e2400245. [PMID: 39012277 DOI: 10.1002/marc.202400245] [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: 04/17/2024] [Revised: 07/03/2024] [Indexed: 07/17/2024]
Abstract
Advancements in flexible electronic technology, especially the progress in foldable displays and under-display cameras (UDC), have created an urgent demand for high-performance colorless polyimide (CPI). However, current CPIs lack sufficient heat resistance for substrate applications. In this work, four kinds of rigid spirobifluorene diamines are designed, and the corresponding polyimides are prepared by their condensation with 5,5'-(perfluoropropane-2,2-diyl) bis(isobenzofuran-1,3-dione) (6FDA) or 9,9-bis(3,4-dicarboxyphenyl) fluorene dianhydride (BPAF). The rigid and conjugated spirobifluorene units endow the polyimides with higher glass transition temperature (Tg) ranging from 356 to 468 °C. Their optical properties are regulated by small side groups and spirobifluorene structure with a periodically twisted molecular conformation. Consequently, a series of CPIs with an average transmittance ranging from 75% to 88% and a yellowness index (YI) as low as 2.48 are obtained. Among these, 27SPFTFA-BPAF presents excellent comprehensive performance, with a Tg of 422 °C, a 5 wt.% loss temperature (Td5) of 562 °C, a YI of 3.53, and a tensile strength (δmax) of 140 MPa, respectively. The mechanism underlying the structure-property relationship is investigated by experimental comparison and theoretical calculation, and the proposed method provides a pathway for designing highly rigid conjugated CPIs with excellent thermal stability and transparency for photoelectric engineering.
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Affiliation(s)
- Yunzhi Fang
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Xuemin Lu
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Junjie Xiao
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Shu-Yu Zhang
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
- Qinghai Institute of Salt Lakes, Key Laboratory of Green and High-End Utilization of Salt Lake Resources, Chinese Academy of Sciences, Xining, 810008, P. R. China
| | - Qinghua Lu
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
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2
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Zhang J, Zhang Y, Cui L, Jian Z. High-Refractive-Index Cross-Linked Cyclic Olefin Polymers with Excellent Transparency via Thiol-Ene Click Reaction. ACS Macro Lett 2024; 13:781-787. [PMID: 38833211 DOI: 10.1021/acsmacrolett.4c00243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2024]
Abstract
High-refractive-index polymers are important optical materials in optoelectronics. Conventional cyclic olefin polymers (COPs), possessing many excellent optical properties, are a class of highly promising optical materials; however, one of the greatest obstacles is their low refractive index of n = 1.52-1.54. Here, one efficient strategy of first incorporating high molar refraction groups, including carbazolyl and indolyl moieties, into unsaturated COPs via ring-opening metathesis polymerization (ROMP) and then introducing another high molar refraction sulfur atom by a subsequent thiol-ene click reaction is presented. The obtained cross-linked COPs bearing both an aromatic group and sulfur possess significantly higher refractive indices (n = 1.611-1.684 at 589 nm) and highly optical transparency (approximately 95%) in the range of vis-NIR. This provides a way toward potential applications of new-generation optical materials.
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Affiliation(s)
- Jian Zhang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Yixin Zhang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Lei Cui
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Zhongbao Jian
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China
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3
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Mazumder K, Voit B, Banerjee S. Recent Progress in Sulfur-Containing High Refractive Index Polymers for Optical Applications. ACS OMEGA 2024; 9:6253-6279. [PMID: 38371831 PMCID: PMC10870412 DOI: 10.1021/acsomega.3c08571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 12/23/2023] [Accepted: 12/27/2023] [Indexed: 02/20/2024]
Abstract
The development in the field of high refractive index materials is a crucial factor for the advancement of optical devices with advanced features such as image sensors, optical data storage, antireflective coatings, light-emitting diodes, and nanoimprinting. Sulfur plays an important role in high refractive index applications owing to its high molar refraction compared to carbon. Sulfur exists in multiple oxidation states and can exhibit various stable functional groups. Over the last few decades, sulfur-containing polymers have attracted much attention owing to their wide array of applications governed by the functional group of sulfur present in the polymer repeat unit. The interplay of refractive index and various other polymer properties contributes to successfully implementing a specific polymer material in optical applications. The focus on developing optoelectronic devices induced an ever-increasing need to integrate different functional materials to achieve the devices' full potential. Several devices that see the potential use of sulfur in high refractive index materials are reviewed in the study. Like sulfur, selenium also exhibits high molar refraction and unique chemical properties, making it an essential field of study. This review covers the research and development in the field of sulfur and selenium in different forms of functionality, focusing on the chemistry of bonding and the optical properties of the polymers containing the heteroatoms mentioned above. The strategy and rationale behind incorporating heteroatoms in a polymer matrix to produce high-refractive-index materials are also described in the present review.
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Affiliation(s)
- Kajari Mazumder
- Materials Science Centre, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Strasse 6, 01069 Dresden, Germany
| | - Brigitte Voit
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Strasse 6, 01069 Dresden, Germany
| | - Susanta Banerjee
- Materials Science Centre, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
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4
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Achieving both low thermal expansion and low birefringence for polyimides by regulating chain structures. Eur Polym J 2023. [DOI: 10.1016/j.eurpolymj.2023.111986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2023]
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5
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Luo Y, Ni L, Shen L, Qiu C, Liu P, Liang M, Zou H, Zhou S. Fabrication of Rigid Polyimide Foams by Constructing Dual Crosslinking Network Structures. Ind Eng Chem Res 2023. [DOI: 10.1021/acs.iecr.2c03496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Yinfu Luo
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu610065, China
| | - Long Ni
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu610065, China
| | - Lu Shen
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu610065, China
| | - Chen Qiu
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu610065, China
| | - Pengbo Liu
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu610065, China
| | - Mei Liang
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu610065, China
| | - Huawei Zou
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu610065, China
| | - Shengtai Zhou
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu610065, China
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6
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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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7
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Mazumder K, Komber H, Bittrich E, Uhlig K, Voit B, Banerjee S. Sulfur-Rich Polyimides Containing Bis(3-(trifluoromethyl)phenyl)thiophene for High-Refractive-Index Applications. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kajari Mazumder
- Materials Science Centre, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Strasse 6, 01069 Dresden, Germany
| | - Hartmut Komber
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Strasse 6, 01069 Dresden, Germany
| | - Eva Bittrich
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Strasse 6, 01069 Dresden, Germany
| | - Kai Uhlig
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Strasse 6, 01069 Dresden, Germany
| | - Brigitte Voit
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Strasse 6, 01069 Dresden, Germany
- Chair Organic Chemistry of Polymers, Technische Universität Dresden, 01062 Dresden, Germany
| | - Susanta Banerjee
- Materials Science Centre, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
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8
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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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9
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Sato K, Tominaga Y, Imai Y. Optically transparent and thermally conductive composite films of α-alumina and highly refractive polyimide. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04528-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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10
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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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11
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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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12
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Luo Y, Ni L, Shen L, Sun T, Liang M, Liu P, Zou H, Zhou S. Fabrication of rigid polyimide foams by adopting active crosslinking strategy. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125220] [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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13
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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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14
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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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15
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Luo Y, Ni L, Zhang X, Jiang X, Zou H, Zhou S, Liang M, Liu P. Fabrication of Rigid Polyimide Foams with Superior Compressive Properties. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.1c04059] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Yinfu Luo
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Long Ni
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Xueqin Zhang
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Xinyue Jiang
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Huawei Zou
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Shengtai Zhou
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Mei Liang
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Pengbo Liu
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
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16
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Zuo H, Qian G, Li HB, Gan F, Fang Y, Li X, Dong J, Zhao X, Zhang Q. Reduced coefficient of linear thermal expansion for colorless and transparent polyimide by introducing rigid-rod amide units: synthesis and properties. Polym Chem 2022. [DOI: 10.1039/d2py00062h] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polyimide films with high optical transparency and dimensional stability and low linear thermal expansion were synthesized by introducing rigid-rod amide units.
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Affiliation(s)
- Hongtao Zuo
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China
| | - Guangtao Qian
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China
| | - Hai-Bei Li
- School of Ocean, Shandong University, Weihai 264209, P. R. China
| | - Feng Gan
- School of Textile Materials and Engineering, Wuyi University, Jiangmen, Guangdong 529020, P. R. China
| | - Yuting Fang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China
| | - Xiuting Li
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China
| | - Jie Dong
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China
| | - Xin Zhao
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China
| | - Qinghua Zhang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China
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17
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Kamitani T, Imoto H, Naka K. Soluble and processable thermoplastic hybrid polyimides containing POSS in main chains. Polym Chem 2022. [DOI: 10.1039/d2py00980c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The combination of 3,13-bis(3-aminopropyl)-double-decker-shaped-silsesquioxane and a fluorinated dianhydride produces a flexible polyimide with a low Tg, high heat resistance, and excellent solvent solubility. The fluorinated dianhydride loosened the interchain packing to suppress CT interactions, leading to the formation of a colorless polyimide.
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Affiliation(s)
- Tasuku Kamitani
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
- Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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18
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Xue S, Lei X, Xiao Y, Xiong G, Lian R, Xin X, Peng Y, Zhang Q. Highly Refractive Polyimides Derived from Efficient Catalyst-Free Thiol–Yne Click Polymerization. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01959] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shuyu Xue
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, P. R. China
- School of Chemistry and Chemical Engineering, Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions of Ministry of Education, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, P. R. China
| | - Xingfeng Lei
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, P. R. China
- School of Chemistry and Chemical Engineering, Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions of Ministry of Education, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, P. R. China
| | - Yuyang Xiao
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, P. R. China
| | - Guo Xiong
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, P. R. China
| | - Ruhe Lian
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, P. R. China
| | - Xiangze Xin
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, P. R. China
| | - Yutian Peng
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, P. R. China
| | - Qiuyu Zhang
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, P. R. China
- School of Chemistry and Chemical Engineering, Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions of Ministry of Education, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, P. R. China
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19
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New Strategy for Inducing Surface Anisotropy in Polyimide Films for Nematics Orientation in Display Applications. NANOMATERIALS 2021; 11:nano11113107. [PMID: 34835871 PMCID: PMC8622647 DOI: 10.3390/nano11113107] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 11/10/2021] [Accepted: 11/15/2021] [Indexed: 01/04/2023]
Abstract
The operability of liquid crystal displays is strongly impacted by the orientation aspects of nematics, which in turn are affected by the alignment layer surface features. In this work, two polyimide (PI) structures are obtained based on a cycloaliphatic dianhydride and aromatic or aliphatic diamines with distinct flexibility. The attained PI films have high transmittance (T) for visible radiations, i.e., at 550 nm T > 80%. Here, a novel strategy for creating surface anisotropy in the samples that combines rubbing with a cloth and stretching via pressing is reported. Birefringence and atomic force microscopy (AFM) scans reveal that the generated orientation of the chains is affected by the chemical structure of the polymer and order of the steps involved in the surface treatment. Molecular modeling computations and wettability tests show that the PI structure and produced surface topography are competitive factors, which are impacting the intensity of the interactions with the nematic liquid crystals. The achieved results are of great relevance for designing of reliable display devices with improved uniform orientation of liquid crystals.
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20
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Ahn JS, Park SH, Kwon NY, Cho MJ, Paek SH, Choi DH. Physical Properties of Thermally Crosslinked Fluorinated Polyimide and Its Application to a Liquid Crystal Alignment Layer. Polymers (Basel) 2021; 13:3903. [PMID: 34833204 PMCID: PMC8621600 DOI: 10.3390/polym13223903] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 11/08/2021] [Accepted: 11/09/2021] [Indexed: 01/29/2023] Open
Abstract
This study demonstrated the use of a thermally crosslinked polyimide (PI) for the liquid crystal (LC) alignment layer of an LC display (LCD) cell. Polyamic acid was prepared using 4,4'-oxydianiline (ODA) and 4,4'-(hexafluoroisopropylidene) diphthalic anhydride (6FDA). The 6FDA-ODA-based polyimide (PI) prepared by the thermal cyclic dehydration of the polyamic acid (PAA) was soluble in various polar solvents. After forming a thin film by mixing trifunctional epoxide [4-(oxiran-2-ylmethoxy)-N,N-bis(oxiran-2-ylmethyl)aniline] with the 6FDA-ODA-based PAA, it was confirmed that thermal curing at -110 °C caused an epoxy ring opening reaction, which could result in the formation of a networked polyimide not soluble in tetrahydrofuran. The crosslinked PI film showed a higher rigidity than the neat PI films, as measured by the elastic modulus. Furthermore, based on a dynamic mechanical analysis of the neat PI and crosslinked PI films, the glass transition temperatures (Tgs) were 217 and 339 °C, respectively, which provided further evidence of the formation of crosslinking by the addition of the epoxy reagent. After mechanical rubbing using these two PI films, an LC cell was fabricated using an anisotropic PI film as an LC alignment film. LC cells with crosslinked PI layers showed a high voltage holding ratio and low residual direct current voltage. This suggests that the crosslinked PI has good potential for use as an LC alignment layer material in advanced LCD technologies that require high performance and reliability.
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Affiliation(s)
- Jong-Soo Ahn
- Department of Chemistry, Research Institute for Natural Science, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Korea; (J.-S.A.); (S.H.P.); (N.Y.K.)
| | - Su Hong Park
- Department of Chemistry, Research Institute for Natural Science, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Korea; (J.-S.A.); (S.H.P.); (N.Y.K.)
| | - Na Yeon Kwon
- Department of Chemistry, Research Institute for Natural Science, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Korea; (J.-S.A.); (S.H.P.); (N.Y.K.)
| | - Min Ju Cho
- Department of Chemistry, Research Institute for Natural Science, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Korea; (J.-S.A.); (S.H.P.); (N.Y.K.)
| | - Sang-Hyon Paek
- Department of Chemical Engineering, Kyung Hee University, 1732, Deogyeong-daero, Giheung-gu, Yongin-si 17104, Korea
| | - Dong Hoon Choi
- Department of Chemistry, Research Institute for Natural Science, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Korea; (J.-S.A.); (S.H.P.); (N.Y.K.)
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21
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Luo Y, Ni L, Zhang C, Yan L, Zou H, Zhou S, Liang M. Fabrication of Hollow Polyimide Microspheres with Controllable Sizes. MACROMOL CHEM PHYS 2021. [DOI: 10.1002/macp.202100197] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Yinfu Luo
- The State Key Laboratory of Polymer Materials Engineering Polymer Research Institute Sichuan University Chengdu 610065 China
| | - Long Ni
- The State Key Laboratory of Polymer Materials Engineering Polymer Research Institute Sichuan University Chengdu 610065 China
| | - Cheng Zhang
- The State Key Laboratory of Polymer Materials Engineering Polymer Research Institute Sichuan University Chengdu 610065 China
| | - Liwei Yan
- The State Key Laboratory of Polymer Materials Engineering Polymer Research Institute Sichuan University Chengdu 610065 China
| | - Huawei Zou
- The State Key Laboratory of Polymer Materials Engineering Polymer Research Institute Sichuan University Chengdu 610065 China
| | - Shengtai Zhou
- The State Key Laboratory of Polymer Materials Engineering Polymer Research Institute Sichuan University Chengdu 610065 China
| | - Mei Liang
- The State Key Laboratory of Polymer Materials Engineering Polymer Research Institute Sichuan University Chengdu 610065 China
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22
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Luo Y, Ni L, Yan L, Zou H, Zhou S, Liang M. Structure to Properties Relations of Polyimide Foams Derived from Various Dianhydride Components. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c01534] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Yinfu Luo
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, P. R. China
| | - Long Ni
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, P. R. China
| | - Liwei Yan
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, P. R. China
| | - Huawei Zou
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, P. R. China
| | - Shengtai Zhou
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, P. R. China
| | - Mei Liang
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, P. R. China
- Chengdu Kedabochuang Technology, Ltd., Chengdu 610041, P. R. China
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23
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Mavila S, Sinha J, Hu Y, Podgórski M, Shah PK, Bowman CN. High Refractive Index Photopolymers by Thiol-Yne "Click" Polymerization. ACS APPLIED MATERIALS & INTERFACES 2021; 13:15647-15658. [PMID: 33780226 DOI: 10.1021/acsami.1c00831] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
A scalable synthesis of high refractive index, optically transparent photopolymers from a family of low-viscosity multifunctional thiol and alkyne monomers via thiol-yne "click" is described herein. The monomers designed to incorporate high refractive index cores consisting of aryl and sulfide groups with high intrinsic molar refraction were synthesized starting from commercially available low-cost raw materials. The low-viscosity (<500 cP) thiol-yne resins formulated with these new multifunctional monomers and a phosphine oxide photoinitiator underwent efficient thiol-yne polymerizations upon exposure to 405 nm light at 30 mW/cm2. In contrast to the previously reported thiol-ene systems, the kinetic profile of these photopolymerizations showed significant dependence on the nature of the thiol and alkyne monomers. However, the ability of the thiol-yne reaction to introduce a large number of sulfide linkages compared to that of thiol-ene systems yielded cross-linked high optical quality photopolymers with a polymer refractive index that exceeds 1.68 (nD/20 °C). Interestingly, the photopolymer formed from the least sterically hindered alkynyl thioether monomer 2b with flexible thioether core and the dithiol 1a exhibited unprecedented difference in the polymer refractive index as compared to that of the resin with polymerization-induced changes reaching up to 0.08. Furthermore, the implementation of these low-viscosity thiol-yne resins was demonstrated by preparing two-stage photopolymeric holographic materials with a dynamic range of ∼0.02 and haze < 1.5% in two-dimensional high refractive index structures.
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Affiliation(s)
- Sudheendran Mavila
- Department of Chemical and Biological Engineering, University of Colorado at Boulder, Boulder, Colorado 80309, United States
| | - Jasmine Sinha
- Department of Chemical and Biological Engineering, University of Colorado at Boulder, Boulder, Colorado 80309, United States
| | - Yunfeng Hu
- Department of Chemical and Biological Engineering, University of Colorado at Boulder, Boulder, Colorado 80309, United States
- Department of Chemistry, University of Colorado Boulder, Boulder Colorado 80309, United States
| | - Maciej Podgórski
- Department of Chemical and Biological Engineering, University of Colorado at Boulder, Boulder, Colorado 80309, United States
- Department of Polymer Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University, M. Curie-Sklodowska Sq. 5, Lublin 20-031, Poland
| | - Parag K Shah
- Department of Chemical and Biological Engineering, University of Colorado at Boulder, Boulder, Colorado 80309, United States
| | - Christopher N Bowman
- Department of Chemical and Biological Engineering, University of Colorado at Boulder, Boulder, Colorado 80309, United States
- Materials Science and Engineering Program, University of Colorado at Boulder, Boulder, Colorado 80309, United States
- BioFrontiers Institute, University of Colorado at Boulder, Boulder, Colorado 80309, United States
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24
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He X, Wang S, Wu X, Shu C, Fan X, Yu Z, Huang W. Soluble and transparent polyimides with high Tgs from a new semi-aliphatic diamine with cyclohexyl and ortho-methyl groups. HIGH PERFORM POLYM 2020. [DOI: 10.1177/0954008320967052] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Herein a semi-aliphatic diamine 4,4′-(cyclohexylmethylene)bis(2-methylaniline) (CHMBMA) with a pendant cyclohexyl and two ortho-substituted methyl groups is synthesized from o-toluidine and cyclohexanecarbaldehyde by Mannich and rearrangement reactions. Then CHMBMA is polycondensed with five commercial aromatic dianhydrides by the high-temperature one-step method with the thermal imidization to produce a series of polyimides (PIs, PI-H(1–5)). The weight-averaged molecular weights ( M ws) of PI-H(1–5) are in the range from 9.08 × 104 to 27.48 × 104 g mol−1 with the polydispersity indices (PDI) from 3.29 to 6.13 by gel permeation chromatography (GPC) measurement. They are soluble in common organic solvents (such as THF, CHCl3 etc.) and can form transparent, tough films with light-color (Thickness: 20–26 μm) by the solution-casting method. The light transmittance of them is above 80% in the visible range from 400 to 760 nm. They exhibit excellent mechanical properties with tensile strength from 72.2 to 97.06 MPa and tensile modulus from 0.9 to 1.9 GPa. Furthermore, they also display low water absorption rates (<2.5%), good thermal stability (5% weight loss temperatures ( T 5%) in the range from 466 to 480°C under N2 atmosphere and high glass transition temperatures ( T gs ≥ 319°C). As comparison, we also synthesize these PIs (PI-L(1–5)) by the low-temperature two-step method with the chemical imidization. The M ws of PI-L(1–5) are lower than those of PI-H(1–5), but the film color of PI-L(1–5) is relatively lighter than the corresponding one of PI-H(1–5). In summary, the introduction of cyclohexyl and ortho-substituted methyl groups into the backbone can improve the solubility of PIs and the transparency of their corresponding films without reducing their T gs.
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Affiliation(s)
- Xiaoqian He
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai, China
| | - Shoubai Wang
- Nantong University Xinglin College, Nantong, China
| | - Xiuming Wu
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai, China
| | - Chen Shu
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai, China
| | - Xiang Fan
- Shanghai Institute of Space Power-Sources, Shanghai, China
| | - Zhenhai Yu
- Shanghai Institute of Space Power-Sources, Shanghai, China
| | - Wei Huang
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai, China
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25
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Li Q, Liu S, Xu M, Pan X, Li N, Zhu J, Zhu X. Selenide-containing soluble polyimides: High refractive index and redox responsiveness. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2019.109358] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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26
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Xu W, Ma X, Su Y, Song Y, Shang M, Lu X, Lu Q. Synthesis of highly transparent and thermally stable copolyimide with fluorine‐containing dianhydride and alicyclic dianhydride. J Appl Polym Sci 2019. [DOI: 10.1002/app.48603] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Wenhua Xu
- School of Chemistry and Chemical EngineeringShanghai Jiao Tong University Shanghai 200240 People's Republic of China
| | - Xiaoru Ma
- School of Chemical Science and EngineeringTongji University Shanghai 200092 People's Republic of China
| | - Yuanhai Su
- School of Chemistry and Chemical EngineeringShanghai Jiao Tong University Shanghai 200240 People's Republic of China
| | - Yang Song
- School of Chemistry and Chemical EngineeringShanghai Jiao Tong University Shanghai 200240 People's Republic of China
| | - Minjing Shang
- School of Chemistry and Chemical EngineeringShanghai Jiao Tong University Shanghai 200240 People's Republic of China
| | - Xuemin Lu
- School of Chemistry and Chemical EngineeringShanghai Jiao Tong University Shanghai 200240 People's Republic of China
| | - Qinghua Lu
- School of Chemistry and Chemical EngineeringShanghai Jiao Tong University Shanghai 200240 People's Republic of China
- School of Chemical Science and EngineeringTongji University Shanghai 200092 People's Republic of China
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27
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Biphenyl Diimide Based Novel Blue Emitters with Aggregation‐Induced Blue‐Shifted Emission Characteristics. CHEMPHOTOCHEM 2019. [DOI: 10.1002/cptc.201900202] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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28
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Zhang T, Pan Y, Song C, Huang B, Huang ZZ. High optical transparency, low dielectric constant and light color of organosoluble fluorinated polyimides based on 10,10-bis[4-(4-amino-3-trifluoromethylphenoxy)phenyl]-9(10H)-anthrone. Polym Bull (Berl) 2019. [DOI: 10.1007/s00289-019-02955-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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29
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Lan Z, Li C, Yu Y, Wei J. Colorless Semi-Alicyclic Copolyimides with High Thermal Stability and Solubility. Polymers (Basel) 2019; 11:polym11081319. [PMID: 31394813 PMCID: PMC6723692 DOI: 10.3390/polym11081319] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Revised: 07/29/2019] [Accepted: 07/29/2019] [Indexed: 11/29/2022] Open
Abstract
A series of colorless copolyimide films with high thermal stability and good solubility are synthesized from (trifluoromethyl)biphenyl-4,4’-diamine (TFMB) with different 1,2,4,5-cyclohexanetetracarboxylic dianhydride (HPMDA) to 2,2-bis(3,4-dicarboxyphenyl)-hexafluoropropane (6FDA) dianhydride mole ratios through one-pot solution polycondensation. These copolyimide films exhibit excellent optical transparency (T400 > 90% and λ0 ~305–333 nm) with a thickness of 15 μm and good solubility in most organic solvents. The excellent optical properties are mainly attributed to the low inter- and intra-molecular charge transfer interactions due to the alicyclic structure and the strong electronegative CF3 groups. The glass transition temperature increases from 332 to 352 °C with increasing HPMDA content in the copolymers, while the thermal decomposition temperature is improved with increasing 6FDA content. These results indicate that the copolyimide 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)
- Zhongxu Lan
- Department of Materials Science & State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, China
| | - Chunyu Li
- Department of Materials Science & State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, China
| | - Yanlei Yu
- Department of Materials Science & State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, China
| | - Jia Wei
- Department of Materials Science & State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, China.
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30
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Liang N, Fujiwara E, Nara M, Ishige R, Ando S. Photoluminescence Properties of Novel Fluorescent Polyimide Based on Excited State Intramolecular Proton Transfer at The End Groups. J PHOTOPOLYM SCI TEC 2019. [DOI: 10.2494/photopolymer.32.449] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Naiqiang Liang
- Department of Chemical Science and Engineering, Tokyo Institute of Technology
| | - Eisuke Fujiwara
- Department of Chemical Science and Engineering, Tokyo Institute of Technology
| | - Mayuko Nara
- Department of Chemical Science and Engineering, Tokyo Institute of Technology
| | - Ryohei Ishige
- Department of Chemical Science and Engineering, Tokyo Institute of Technology
| | - Shinji Ando
- Department of Chemical Science and Engineering, Tokyo Institute of Technology
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31
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Transparent, High Glass-Transition Temperature, Shape Memory Hybrid Polyimides Based on Polyhedral Oligomeric Silsesquioxane. Polymers (Basel) 2019; 11:polym11061058. [PMID: 31216710 PMCID: PMC6631720 DOI: 10.3390/polym11061058] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 06/13/2019] [Accepted: 06/14/2019] [Indexed: 11/17/2022] Open
Abstract
Optically transparent polyimides with excellent thermal stability and shape memory effect have potential applications in optoelectronic devices and aerospace industries. A series of optically transparent shape memory polyimide hybrid films are synthesized from 2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride (6FDA) and 2,2′-bis-(trifluoromethyl)biphenyl-4,4′-diamine (TFMB) with various polyhedral oligomeric silsesquioxane (POSS) contents and then subjected to thermal imidization. The hybrid films show good optical transparency (>80% at 400 nm and >95% at 500 nm) with cutoff wavelengths ranging from 318 to 336 nm. Following the incorporation of the inorganic POSS structure, the hybrid films exhibit excellent thermal stability with glass transition temperature (Tg) ranging from 351 to 372 °C. The hybrid films possess the highest Tg compared with the previously-reported shape memory polymers. These findings show that POSS is successfully utilized to develop transparent polyimides with excellent thermal stability and shape memory effect.
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32
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Zhuang Y, Orita R, Fujiwara E, Zhang Y, Ando S. Colorless Partially Alicyclic Polyimides Based on Tröger’s Base Exhibiting Good Solubility and Dual Fluorescence/Phosphorescence Emission. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00273] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Yongbing Zhuang
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-E4-5, Meguro-ku, Tokyo 152-8552, Japan
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - Ryoji Orita
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-E4-5, Meguro-ku, Tokyo 152-8552, Japan
| | - Eisuke Fujiwara
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-E4-5, Meguro-ku, Tokyo 152-8552, Japan
| | - Yu Zhang
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - Shinji Ando
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-E4-5, Meguro-ku, Tokyo 152-8552, Japan
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33
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34
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Wu Q, Ma X, Zheng F, Lu X, Lu Q. Synthesis of highly transparent and heat‐resistant polyimides containing bulky pendant moieties. POLYM INT 2019. [DOI: 10.1002/pi.5811] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Qi Wu
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal AgingShanghai Jiao Tong University Shanghai China
| | - Xiaoru Ma
- School of Chemical Science and EngineeringTongji University Shanghai China
| | - Feng Zheng
- School of Chemical Science and EngineeringTongji University Shanghai China
| | - Xuemin Lu
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal AgingShanghai Jiao Tong University Shanghai China
| | - Qinghua Lu
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal AgingShanghai Jiao Tong University Shanghai China
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35
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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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36
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Tapaswi PK, Ha CS. Recent Trends on Transparent Colorless Polyimides with Balanced Thermal and Optical Properties: Design and Synthesis. MACROMOL CHEM PHYS 2019. [DOI: 10.1002/macp.201800313] [Citation(s) in RCA: 81] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Pradip Kumar Tapaswi
- Narasinha Dutt College; University of Calcutta; Kolkata 711101 West Bengal India
| | - Chang-Sik Ha
- Department of Polymer Science and Engineering; Pusan National University; Busan 46241 Republic of Korea
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37
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[9, 9]-Sigmatropic shifts in acid-catalyzed benzidine-type rearrangements. RESEARCH ON CHEMICAL INTERMEDIATES 2018. [DOI: 10.1007/s11164-018-3579-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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38
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Li Q, Zhang J, Pan X, Zhang Z, Zhu J, Zhu X. Selenide-Containing Polyimides with an Ultrahigh Intrinsic Refractive Index. Polymers (Basel) 2018; 10:E417. [PMID: 30966452 PMCID: PMC6415271 DOI: 10.3390/polym10040417] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 04/01/2018] [Accepted: 04/06/2018] [Indexed: 11/22/2022] Open
Abstract
This work developed novel selenium-containing polyimides with a high intrinsic refractive index. Four polyimides with different selenium contents and repeat unit structures were designed and synthesized via amine-dianhydride polycondensation of one of two diamines, i.e., 4,4'-oxydianiline or bis(4-aminophenyl)selanide, with one of two dianhydrides, i.e., bis(4-(3,4-dicarboxylbenzoyloxy)phenyl) ester dianhydride or 1,1'-bis(4-(3,4-dicarboxylbenzoyloxy)phenyl) selenide dianhydride. Various techniques, e.g., nuclear magnetic resonance, Fourier transformed infrared spectroscopy, and wide-angle X-ray diffraction, were used to characterize the polymers' structures. Differential scanning calorimetry, thermogravimetric analysis, ultraviolet-visible spectroscopy, and spectroscopic ellipsometry were used to characterize the properties of the polymers. The selenium contents showed a positive effect on the refractive index of the final polymer. In addition, the refractive index can reach up to 1.968 at 633 nm, which was the highest intrinsic refractive index of a polyimide ever reported. Because of the high intrinsic refractive index, the reflective ratio of visible light on the surface of a silicon wafer was significantly reduced, indicating the potentially utility of the polymer in an anti-reflection coating.
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Affiliation(s)
- Qilong Li
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
| | - Jiandong Zhang
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
| | - Xiangqiang Pan
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
| | - Zhengbiao Zhang
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
| | - Jian Zhu
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
| | - Xiulin Zhu
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
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39
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Jeong KM, Li Y, Yoo DG, Lee NK, Lee HG, Ando S, Ha CS. Effects of crosslinking agents on the physical properties of polyimide/amino-functionalized graphene oxide hybrid films. POLYM INT 2018. [DOI: 10.1002/pi.5555] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Keuk-Min Jeong
- Department of Polymer Science and Engineering; Pusan National University; Busan Republic of Korea
| | - Yuheng Li
- Department of Polymer Science and Engineering; Pusan National University; Busan Republic of Korea
| | - Dae-Geon Yoo
- Department of Polymer Science and Engineering; Pusan National University; Busan Republic of Korea
| | - Nam-Kyoung Lee
- Department of Polymer Science and Engineering; Pusan National University; Busan Republic of Korea
| | - Hyeok-Gi Lee
- Department of Polymer Science and Engineering; Pusan National University; Busan Republic of Korea
| | - Shinji Ando
- Department of Chemical Science and Engineering; Tokyo Institute of Technology; Tokyo Japan
| | - Chang-Sik Ha
- Department of Polymer Science and Engineering; Pusan National University; Busan Republic of Korea
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40
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Ai L, Zhang J, Li X, Zhang X, Lu Y, Song W. Universal Low-Temperature Process for Preparation of Multifunctional High-Performance Antireflective Mesoporous Silica Coatings on Transparent Polymeric Substrates. ACS APPLIED MATERIALS & INTERFACES 2018; 10:4993-4999. [PMID: 29319297 DOI: 10.1021/acsami.7b17584] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this work, we developed a universal low-temperature process for the preparation of multifunctional and robust mesoporous silica antireflective coatings on transparent polymeric substrates. The mesoporous silica layer was formed after UV-O3 exposure and ammonia vapor treatment of dried poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) (F127)-containing acidic silica gel. The optical and antiscrubbing properties of the mesoporous silica coating were comparable to those of the coating prepared at 250 °C. The highest optical transmittance reached 99.55%, and the transmittance loss was only 1.02% after 400 scrubbing cycles. The coating surface formed by the low-temperature process was hydrophilic, resulting in excellent antifogging properties. The low-temperature process was successfully applied on various transparent polymeric substrates including polyimide, polyethylene terephthalate, polyethylene naphthalate, and polycarbonate. The excellent optical and mechanical performances of the mesoporous silica antireflective coatings on transparent polymeric substrates allow a wide range of practical applications, especially in the field of flexible electronics.
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Affiliation(s)
- Ling Ai
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences , Ningbo 315201, P. R. China
| | - Jing Zhang
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences , Ningbo 315201, P. R. China
| | - Xiao Li
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences , Ningbo 315201, P. R. China
| | - Xianpeng Zhang
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences , Ningbo 315201, P. R. China
| | - Yuehui Lu
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences , Ningbo 315201, P. R. China
| | - Weijie Song
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences , Ningbo 315201, P. R. China
- Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering , Changzhou 213164, P. R. China
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41
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Deng B, Zhang S, Liu C, Li W, Zhang X, Wei H, Gong C. Synthesis and properties of soluble aromatic polyimides from novel 4,5-diazafluorene-containing dianhydride. RSC Adv 2018. [DOI: 10.1039/c7ra12101f] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
A dianhydride monomer containing 4,5-diazofluorene was synthesized, and the corresponding organo-soluble polyimides exhibited good comprehensive properties.
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Affiliation(s)
- Bo Deng
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Shujiang Zhang
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Chang Liu
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Wei Li
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Xiangdong Zhang
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Hua Wei
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Chenliang Gong
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
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42
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Colorless polyimides derived from isomeric dicyclohexyl-tetracarboxylic dianhydrides for optoelectronic applications. POLYMER 2018. [DOI: 10.1016/j.polymer.2017.11.042] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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43
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Ha CS. Polymer Based Hybrid Nanocomposites; A Progress Toward Enhancing Interfacial Interaction and Tailoring Advanced Applications. CHEM REC 2017; 18:759-775. [DOI: 10.1002/tcr.201700030] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Accepted: 08/01/2017] [Indexed: 01/15/2023]
Affiliation(s)
- Chang-Sik Ha
- Department of Polymer Science and Engineering.; Busan 46241 Korea
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44
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Huang P, Shi HQ, Xiao HM, Li YQ, Hu N, Fu SY. High performance surface-modified TiO 2/silicone nanocomposite. Sci Rep 2017; 7:5951. [PMID: 28729526 PMCID: PMC5519632 DOI: 10.1038/s41598-017-05166-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 05/25/2017] [Indexed: 11/27/2022] Open
Abstract
The mismatch of refractive index (RI) between light emitting diode (LED) chips and packaging resins severely lowers the lighting emitting efficacy of LED. The RI can be enhanced by the introduction of high RI nanoparticles but meanwhile it is a great challenge to maintain the high transparency for resins due to the agglomeration of nanoparticles. In this work, a facile strategy is proposed to fabricate silicone nanocomposites with a high transparency (>88%, less than 2% decrease relative to pure silicone resin), largely enhanced RI (an increase from 1.42 to 1.60) and improved thermal stability (73 °C increase in weight loss of 50%). Specifically, the ultra-fine monodispersed TiO2/silicone composites are prepared by direct solvent mixing of 1 wt% surface modified TiO2 nanoparticles (S-TiO2) into the silicone resin, in which S-TiO2 are prepared by direct introduction of titanate coupling agent in the process of TiO2 growth to induce the formation of protective layer on the surfaces of TiO2 nanoparticles. This methodology demonstrated is simple, cost-effective and versatile for the massive fabrication of highly transparent LED packaging materials with greatly enhanced refractive index and meanwhile enhanced thermal stability.
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Affiliation(s)
- Pei Huang
- College of Aerospace Engineering, Chongqing University, Chongqing, 400044, China
| | - Han-Qiao Shi
- Aerospace Research Institute of Materials & Processing Technology, Beijing, 100076, China.,Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Hong-Mei Xiao
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Yuan-Qing Li
- College of Aerospace Engineering, Chongqing University, Chongqing, 400044, China.
| | - Ning Hu
- College of Aerospace Engineering, Chongqing University, Chongqing, 400044, China
| | - Shao-Yun Fu
- College of Aerospace Engineering, Chongqing University, Chongqing, 400044, China. .,Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
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45
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Nam KH, Kim H, Choi HK, Yeo H, Goh M, Yu J, Hahn JR, Han H, Ku BC, You NH. Thermomechanical and optical properties of molecularly controlled polyimides derived from ester derivatives. POLYMER 2017. [DOI: 10.1016/j.polymer.2016.11.062] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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46
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Hu X, Yan J, Wang Y, Mu H, Wang Z, Cheng H, Zhao F, Wang Z. Colorless polyimides derived from 2R,5R,7S,10S-naphthanetetracarboxylic dianhydride. Polym Chem 2017. [DOI: 10.1039/c7py01048f] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Colorless polyimides with excellent thermal and mechanical properties were developed from 2R,5R,7S,10S-naphthanetetracarboxylic dianhydride, and their properties were systematically compared with those based on 1S,2R,4S,5R-cyclohexanetetracarboxylic dianhydride.
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Affiliation(s)
- Xiaofan Hu
- Laboratory of Polymer Composites Engineering
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- China
| | - Jingling Yan
- Laboratory of Polymer Composites Engineering
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- China
| | - Yongxia Wang
- Laboratory of Polymer Composites Engineering
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- China
| | - Hongliang Mu
- Laboratory of Polymer Composites Engineering
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- China
| | - Zikun Wang
- Laboratory of Polymer Composites Engineering
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- China
| | - Haiyang Cheng
- Laboratory of Green Chemistry and Process
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
| | - Fengyu Zhao
- Laboratory of Green Chemistry and Process
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
| | - Zhen Wang
- Laboratory of Polymer Composites Engineering
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- China
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47
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Li T, Huang H, Wang L, Chen Y. High performance polyimides with good solubility and optical transparency formed by the introduction of alkyl and naphthalene groups into diamine monomers. RSC Adv 2017. [DOI: 10.1039/c7ra07142f] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Highly soluble and optically transparent polyimides with excellent thermal stability were prepared by the introduction of alkyl and naphthalene groups into a single diamine monomer under microwave-assisted polymerization.
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Affiliation(s)
- Tianyun Li
- School of Materials Science and Engineering
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education
- Sun Yat-sen University
- Guangzhou 510275
- China
| | - Huahua Huang
- School of Materials Science and Engineering
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education
- Sun Yat-sen University
- Guangzhou 510275
- China
| | - Lei Wang
- Shenzhen Key Laboratory of Special Functional Materials
- College of Material Science
- Shenzhen University
- Shenzhen 518060
- China
| | - Yongming Chen
- School of Materials Science and Engineering
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education
- Sun Yat-sen University
- Guangzhou 510275
- China
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48
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Han J, Yin H, Liu C, Wang J, Jian X. Construction of donor-acceptor polymers containing thiophene-phthalazinone moiety via classic Ullmann C N coupling polymerization and their optical-electrical properties. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.08.090] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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49
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Jeong KM, Li YH, Lee HG, Ha CS. Effects of alicyclic moiety incorporation on the properties of polyimide/silica hybrid films. POLYM ADVAN TECHNOL 2016. [DOI: 10.1002/pat.3802] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Keuk-Min Jeong
- Department of Polymer Science and Engineering; Pusan National University; Busan 46241 Korea
| | - Yu-Heng Li
- Department of Polymer Science and Engineering; Pusan National University; Busan 46241 Korea
| | - Hyeok-Gi Lee
- Department of Polymer Science and Engineering; Pusan National University; Busan 46241 Korea
| | - Chang-Sik Ha
- Department of Polymer Science and Engineering; Pusan National University; Busan 46241 Korea
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50
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Maekawa S, Moorthi K. Polymer Optical Constants from Long-Range Corrected DFT Calculations. J Phys Chem B 2016; 120:2507-16. [DOI: 10.1021/acs.jpcb.5b10203] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shintaro Maekawa
- R&D Center, Mitsui Chemicals, Inc., 580-32 Nagaura, Sodegaura, 299-0265, Japan
| | - Krzysztof Moorthi
- R&D Center, Mitsui Chemicals, Inc., 580-32 Nagaura, Sodegaura, 299-0265, Japan
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