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Zhang T, Wang S, Chai Y, Yu J, Zhu W, Li L, Li B. Prediction and Interpretability Study of the Glass Transition Temperature of Polyimide Based on Machine Learning with Quantitative Structure-Property Relationship ( Tg-QSPR). J Phys Chem B 2024; 128:8807-8817. [PMID: 38979707 DOI: 10.1021/acs.jpcb.4c00756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/10/2024]
Abstract
The glass transition temperature (Tg) is a crucial characteristic of polyimides (PIs). Developing a Tg predictive model using machine learning methodologies can facilitate the design of PI structures and expedite the development process. In this investigation, a data set comprising 1257 PIs was assembled, with Tg values determined using differential scanning calorimetry. 210 molecular descriptors were computed using RDKit, and subsequently, six distinct feature selection methodologies were employed to refine the descriptor set. Quantitative structure-property relationship models targeting Tg (Tg-QSPR) were then constructed using five ensemble learning algorithms and one deep learning algorithm. These models exhibited high predictive accuracy and robustness, with the CATBoost model demonstrating the highest accuracy, achieving a coefficient of determination of 0.823 for the test set, a mean absolute error of 20.1 °C, and a root-mean-square error of 29.0 °C. The study identified the NumRotatableBonds descriptor as particularly influential on Tg, showing a negative correlation with the property. Additionally, the model's accuracy was validated using ten new PI films not included in the original data set, resulting in absolute errors ranging from 2.5 to 26.9 °C and absolute percentage error rates of 1.0-12.8%. These findings underscore the importance of utilizing extensive and diverse data sets for predictive modeling to enhance accuracy and stability. Furthermore, exploring the interpretability of the model and experimentally validating newly synthesized PIs have augmented the practical utility of the model. Under the guidance of the Tg-QSPR models, it will be possible to accelerate the performance prediction and structural design of PIs in the future.
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Affiliation(s)
- Tianyong Zhang
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300354, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
- Tianjin Engineering Research Center of Functional Fine Chemicals, Tianjin 300354, China
| | - Suisui Wang
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300354, China
| | - Yamei Chai
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300354, China
| | - Jianing Yu
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300354, China
| | - Wenxuan Zhu
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300354, China
| | - Liang Li
- College of Intelligence and Computing, Tianjin University, Tianjin 300350, China
| | - Bin Li
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300354, China
- Tianjin Engineering Research Center of Functional Fine Chemicals, Tianjin 300354, China
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Lian M, Tian L, Huang G, Liang S, Zhang Y, Yi N, Fan L, Wu Q, Gan F, Wu Y. Recent Advances in Fluorescent Polyimides. Molecules 2024; 29:4072. [PMID: 39274921 PMCID: PMC11397098 DOI: 10.3390/molecules29174072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2024] [Revised: 08/23/2024] [Accepted: 08/26/2024] [Indexed: 09/16/2024] Open
Abstract
Polyimide (PI) refers to a type of high-performance polymer containing imide rings in the main chain, which has been widely used in fields of aerospace, microelectronic and photonic devices, gas separation technology, and so on. However, traditional aromatic PIs are, in general, the inefficient fluorescence or even no fluorescence, due to the strong inter- and intramolecular charge transfer (CT) interactions causing unavoidable fluorescence quenching, which greatly restricts their applications as light-emitting functional layers in the fabrication of organic light-emitting diode (OLED) devices. As such, the development of fluorescent PIs with high fluorescence quantum efficiency for their application fields in the OLED is an important research direction in the near future. In this review, we provide a comprehensive overview of fluorescent PIs as well as the methods to improve the fluorescence quantum efficiency of PIs. It is anticipated that this review will serve as a valuable reference and offer guidance for the design and development of fluorescent PIs with high fluorescence quantum efficiency, ultimately fostering further progress in OLED research.
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Affiliation(s)
- Manyu Lian
- College of Textile Science and Engineering, Wuyi University, Jiangmen 529020, China
| | - Liyong Tian
- College of Textile Science and Engineering, Wuyi University, Jiangmen 529020, China
| | - Guotao Huang
- College of Textile Science and Engineering, Wuyi University, Jiangmen 529020, China
| | - Siming Liang
- College of Textile Science and Engineering, Wuyi University, Jiangmen 529020, China
| | - Yangfan Zhang
- College of Textile Science and Engineering, Wuyi University, Jiangmen 529020, China
| | - Ningbo Yi
- College of Textile Science and Engineering, Wuyi University, Jiangmen 529020, China
| | - Longfei Fan
- College of Textile Science and Engineering, Wuyi University, Jiangmen 529020, China
| | - Qinghua Wu
- College of Textile Science and Engineering, Wuyi University, Jiangmen 529020, China
| | - Feng Gan
- College of Textile Science and Engineering, Wuyi University, Jiangmen 529020, China
| | - Yancheng Wu
- College of Textile Science and Engineering, Wuyi University, Jiangmen 529020, China
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Li L, Jiang W, Yang X, Meng Y, Hu P, Huang C, Liu F. From Molecular Design to Practical Applications: Strategies for Enhancing the Optical and Thermal Performance of Polyimide Films. Polymers (Basel) 2024; 16:2315. [PMID: 39204535 PMCID: PMC11359642 DOI: 10.3390/polym16162315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2024] [Revised: 08/03/2024] [Accepted: 08/13/2024] [Indexed: 09/04/2024] Open
Abstract
Polyimide (PI) films are well recognized for their outstanding chemical resistance, radiation resistance, thermal properties, and mechanical strength, rendering them highly valuable in advanced fields such as aerospace, sophisticated electronic components, and semiconductors. However, improving their optical transparency while maintaining excellent thermal properties remains a significant challenge. This review systematically checks over recent advancements in enhancing the optical and thermal performance of PI films, focusing on various strategies through molecular design. These strategies include optimizing the main chain, side chain, non-coplanar structures, and endcap groups. Rigid and flexible structural characteristics in the proper combination can contribute to the balance thermal stability and optical transparency. Introducing fluorinated substituents and bulky side groups significantly reduces the formation of charge transfer complexes, enhancing both transparency and thermal properties. Non-coplanar structures, such as spiro and cardo configurations, further improve the optical properties while maintaining thermal stability. Future research trends include nanoparticle doping, intrinsic microporous PI polymers, photosensitive polyimides, machine learning-assisted molecular design, and metal coating techniques, which are expected to further enhance the comprehensive optical and thermal performance of PI films and expand their applications in flexible displays, solar cells, and high-performance electronic devices. Overall, systematic molecular design and optimization have significantly improved the optical and thermal performance of PI films, showing broad application prospects. This review aims to provide researchers with valuable references, stimulate more innovative research and applications, and promote the deep integration of PI films into modern technology and industry.
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Affiliation(s)
- Liangrong Li
- Fuzhou Medical School, Nanchang University, Fuzhou 344000, China; (L.L.); (W.J.); (X.Y.)
| | - Wendan Jiang
- Fuzhou Medical School, Nanchang University, Fuzhou 344000, China; (L.L.); (W.J.); (X.Y.)
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China
| | - Xiaozhe Yang
- Fuzhou Medical School, Nanchang University, Fuzhou 344000, China; (L.L.); (W.J.); (X.Y.)
| | - Yundong Meng
- Jiangxi Shengyi Technology Co., Ltd., Jiujiang 332005, China; (Y.M.); (P.H.); (C.H.)
| | - Peng Hu
- Jiangxi Shengyi Technology Co., Ltd., Jiujiang 332005, China; (Y.M.); (P.H.); (C.H.)
| | - Cheng Huang
- Jiangxi Shengyi Technology Co., Ltd., Jiujiang 332005, China; (Y.M.); (P.H.); (C.H.)
| | - Feng Liu
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China
- Jiangxi Shengyi Technology Co., Ltd., Jiujiang 332005, China; (Y.M.); (P.H.); (C.H.)
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Wang Z, Hu J, Wang H. Hierarchical Polyimide Microparticles with Controllable Morphology. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2400487. [PMID: 38537118 DOI: 10.1002/smll.202400487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2024] [Revised: 03/04/2024] [Indexed: 08/17/2024]
Abstract
Hierarchical polyimides (PIs) not only show outstanding thermal stability and high mechanical strength but also have great advantages in terms of microstructure and surface area, which makes them highly valuable in various fields such as aerospace, microelectronics, adsorption, catalysis, and energy storage. However, great challenges still remain in the synthesis of hierarchical PIs with well-defined microstructure. Herein, polyamide acid salts (PAAS) with tunable ionization degree are synthesized first via the polymerization of dianhydride and diamine monomers in deionized water with 1,2-dimethylimidazole (DMIZ). Then cationic cetyltrimethylammonium chloride (CTAC) is added to the PAAS aqueous solution to induce the formation of polyelectrolyte-surfactant complexes based on electrostatic interaction. After a typical hydrothermal reaction (HTR) procedure, hierarchical PIs with different microstructures such as urchin-like PI microparticles, flower-like PI microparticles, and lamellar PI petals can be fabricated simply by changing the additive amount of DMIZ and CTAC. The nanostructure self-assemblies of PAAS are dominated by the charges on macromolecular chains and the formation of hierarchical structures of polymers is ascribed to a geometrical selection process during crystal growth. This work provides valuable insights into the self-assembly behaviors of polyelectrolyte systems for synthesizing well-defined hierarchical polymers.
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Affiliation(s)
- Zhichao Wang
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, China
| | - Jianhua Hu
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, China
| | - Haitao Wang
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, China
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Ren X, Wang Z, He Z, Yang C, Qi Y, Han S, Chen S, Yu H, Liu J. Synthesis and Characterization of Organo-Soluble Polyimides Based on Polycondensation Chemistry of Fluorene-Containing Dianhydride and Amide-Bridged Diamines with Good Optical Transparency and Glass Transition Temperatures over 400 °C. Polymers (Basel) 2023; 15:3549. [PMID: 37688175 PMCID: PMC10490053 DOI: 10.3390/polym15173549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Revised: 08/16/2023] [Accepted: 08/24/2023] [Indexed: 09/10/2023] Open
Abstract
Polymeric optical films with light colors, good optical transparency and high thermal resistance have gained increasing attention in advanced optoelectronic areas in recent years. However, it is somewhat inter-conflicting for achieving the good optical properties to the conventional thermal resistant polymers, such as the standard aromatic polyimide (PI) films, which are well known for the excellent combined properties and also the deep colors. In this work, a series of wholly aromatic PI films were prepared via the polycondensation chemistry of one fluorene-containing dianhydride, 9,9-bis(3,4-dicarboxyphenyl)fluorene dianhydride (FDAn) and several aromatic diamines with amide linkages in the main chain, including 9,9-bis [4-(4-aminobenzamide)phenyl]fluorene (FDAADA), 2,2'-bis(trifluoromethyl)-4,4'-bis[4-(4-aminobenzamide)] biphenyl (ABTFMB), and 2,2'-bis(trifluoromethyl)-4,4'-bis[4-(4-amino-3-methyl)benzamide] biphenyl (MABTFMB). The derived FLPI-1 (FDAn-FDAADA), FLPI-2 (FDAn-ABTFMB) and FLPI-3 (FDAn-MABTFMB) resins showed good solubility in the polar aprotic solvents, such as N-methyl-2-pyrrolidone (NMP), N,N-dimethylacetamide (DMAc) and dimethyl sulfoxide (DMSO). The solution-processing FDAn-PI films exhibited good optical transmittance over 80.0% at a wavelength of 500 nm (T500), yellow indices (b*) in the range of 1.01-5.20, and haze values lower than 1.0%. In addition, the FDAn-PI films showed low optical retardance with optical retardation (Rth) values in the range of 31.7-390.6 nm. At the same time, the FDAn-PI films exhibited extremely high glass transition temperatures (Tg) over 420 °C according to dynamic mechanical analysis (DMA) tests. The FDAn-PI films showed good dimensional stability at elevated temperatures with linear coefficients of thermal expansion (CTE) in the range of (31.8-45.8) × 10-6/K.
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Affiliation(s)
- Xi Ren
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.R.); (Z.W.); (C.Y.); (Y.Q.); (S.H.); (S.C.)
| | - Zhenzhong Wang
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.R.); (Z.W.); (C.Y.); (Y.Q.); (S.H.); (S.C.)
| | - Zhibin He
- School of Material Science and Engineering, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing 100871, China; (Z.H.); (H.Y.)
| | - Changxu Yang
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.R.); (Z.W.); (C.Y.); (Y.Q.); (S.H.); (S.C.)
| | - Yuexin Qi
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.R.); (Z.W.); (C.Y.); (Y.Q.); (S.H.); (S.C.)
| | - Shujun Han
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.R.); (Z.W.); (C.Y.); (Y.Q.); (S.H.); (S.C.)
| | - Shujing Chen
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.R.); (Z.W.); (C.Y.); (Y.Q.); (S.H.); (S.C.)
| | - Haifeng Yu
- School of Material Science and Engineering, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing 100871, China; (Z.H.); (H.Y.)
| | - Jingang Liu
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.R.); (Z.W.); (C.Y.); (Y.Q.); (S.H.); (S.C.)
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Ren X, He Z, Wang Z, Pan Z, Qi Y, Han S, Yu H, Liu J. Design, Synthesis and Properties of Semi-Alicyclic Colorless and Transparent Polyimide Films with High Glass Transition Temperatures and Low Retardation for Potential Applications in Flexible Electronics. Polymers (Basel) 2023; 15:3408. [PMID: 37631465 PMCID: PMC10459071 DOI: 10.3390/polym15163408] [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: 06/27/2023] [Revised: 08/11/2023] [Accepted: 08/12/2023] [Indexed: 08/27/2023] Open
Abstract
Polyimide (PI) optical films with high glass transition temperatures (high-Tg), high optical transparency, and low optical retardations (low-Rth) are highly desired in advanced optoelectronic applications. However, the standard PI films usually suffer from deep colors, high optical anisotropies and limited Tg values. In the current work, a series of semi-alicyclic colorless and transparent PI (CPI) films were developed from hydrogenated pyromellitic dianhydride stereoisomers, 1S,2R,4S,5R-hydrogenated pyromellitic dianhydride and 1R,2S,4S,5R-hydrogenated pyromellitic dianhydride, and fluorene-containing diamines, including 9,9-bis(4-aminophenyl)fluorene and 9,9-bis(3-fluoro-4-aminophenyl)fluorene, respectively. The derived CPI films showed Tg values higher than 420 °C according to differential scanning calorimetry measurements. In addition, the fluorene-based CPI film showed optical transmittances higher than 80% at the wavelength of 400 nm, with yellow indices in the range of 0.60~1.01 and haze values below 3.0%. The CPI films showed average refractive indices from 1.5407 to 1.6309, extremely low birefringence at the level of minus fourth power of ten, and further exhibited quite low optical retardations below 10 nm.
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Affiliation(s)
- Xi Ren
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.R.); (Z.W.); (Z.P.); (Y.Q.); (S.H.)
| | - Zhibin He
- School of Material Science and Engineering, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing 100871, China; (Z.H.); (H.Y.)
| | - Zhenzhong Wang
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.R.); (Z.W.); (Z.P.); (Y.Q.); (S.H.)
| | - Zhen Pan
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.R.); (Z.W.); (Z.P.); (Y.Q.); (S.H.)
| | - Yuexin Qi
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.R.); (Z.W.); (Z.P.); (Y.Q.); (S.H.)
| | - Shujun Han
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.R.); (Z.W.); (Z.P.); (Y.Q.); (S.H.)
| | - Haifeng Yu
- School of Material Science and Engineering, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing 100871, China; (Z.H.); (H.Y.)
| | - Jingang Liu
- Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China; (X.R.); (Z.W.); (Z.P.); (Y.Q.); (S.H.)
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Bao F, Lei H, Zou B, Peng W, Qiu L, Ye F, Song Y, Qi F, Qiu X, Huang M. Colorless polyimides derived from rigid trifluoromethyl-substituted triphenylenediamines. POLYMER 2023. [DOI: 10.1016/j.polymer.2023.125883] [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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Decreasing the CTE of Thermoplastic Polyimide by Blending with a Thermosetting System. CHINESE JOURNAL OF POLYMER SCIENCE 2023. [DOI: 10.1007/s10118-023-2941-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
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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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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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Feng J, Wang Y, Qin X, Lv Y, Huang Y, Yang Q, Li G, Kong M. Revealing Molecular Mechanisms of Colorless Transparent Polyimide Films under Photo-Oxidation. Polym Degrad Stab 2023. [DOI: 10.1016/j.polymdegradstab.2023.110294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
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Tang J, Li W, Wang Z. Facile synthesis of soluble, self-crosslinkable and crystalline polyimides with ultrahigh thermal/chemical resistance. POLYMER 2023. [DOI: 10.1016/j.polymer.2023.125717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Design and preparation of thermoplastic polyimides with high transmittance based on 4,4'-(4,4'-isopropyldiphenoxy)bis(phthalic anhydride) (BPADA). Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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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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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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Hung YT, Chen CK, Lin YC, Yu YY, Chen WC. Dimensionally thermally stable biomass-based polyimides for flexible electronic applications. Polym J 2022. [DOI: 10.1038/s41428-022-00696-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Xu Y, Zhang M, Pang Y, Zheng T, Zhang L, Wang Z, Yan J. Colorless Polyimides from 2,2',3,3'-Biphenyltetracarboxylic Dianhydride and Fluorinated Diamines. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Wang CO, Zhai L, Mo S, Liu Y, Gao MY, Jia Y, He MH, Fan L. Effect of Aggregation Structure on Thermal Expansion Behavior of Polyimide Films with Different Thickness. CHINESE JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1007/s10118-022-2785-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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19
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Jiao L, Du Z, Dai X, Wang H, Dong Z, Yao H, Qiu X. Based on rigid xanthone group and hydrogen bonding to construct polyimide films with low coefficient of thermal expansion, high temperature resistance, and fluorescent property. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111260] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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20
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Liu X, Zhou J, Zhou Y, Wu M, Zhu Y, Zhao J, Liu S, Xiao H. Chemically crosslinked polyimide-POSS hybrid: A dielectric material with improved dimensional stability and dielectric properties. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111315] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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21
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Jiao L, Zhang Y, Du Z, Dai X, Wang H, Dong Z, Yao H, Qiu X. Ultra‐high
T
g
and ultra‐low coefficient of thermal expansion polyimide films based on hydrogen bond interaction. JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1002/pol.20220177] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Long Jiao
- CAS Key Laboratory of High‐Performance Synthetic Rubber and Its Composite Materials Changchun Institute of Applied Chemistry, Chinese Academy of Sciences Changchun China
- University of Science and Technology of China Hefei China
| | - Yanna Zhang
- The 39th Research Institute of China Electronics Technology Group Corporation Xi'an China
| | - Zhijun Du
- CAS Key Laboratory of High‐Performance Synthetic Rubber and Its Composite Materials Changchun Institute of Applied Chemistry, Chinese Academy of Sciences Changchun China
| | - Xuemin Dai
- CAS Key Laboratory of High‐Performance Synthetic Rubber and Its Composite Materials Changchun Institute of Applied Chemistry, Chinese Academy of Sciences Changchun China
| | - Hanfu Wang
- CAS Key Laboratory of High‐Performance Synthetic Rubber and Its Composite Materials Changchun Institute of Applied Chemistry, Chinese Academy of Sciences Changchun China
| | - Zhixin Dong
- CAS Key Laboratory of High‐Performance Synthetic Rubber and Its Composite Materials Changchun Institute of Applied Chemistry, Chinese Academy of Sciences Changchun China
| | - Haibo Yao
- CAS Key Laboratory of High‐Performance Synthetic Rubber and Its Composite Materials Changchun Institute of Applied Chemistry, Chinese Academy of Sciences Changchun China
- University of Science and Technology of China Hefei China
| | - Xuepeng Qiu
- CAS Key Laboratory of High‐Performance Synthetic Rubber and Its Composite Materials Changchun Institute of Applied Chemistry, Chinese Academy of Sciences Changchun China
- University of Science and Technology of China Hefei China
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22
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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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23
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Wu Y, Liu S, Zhao J. Simultaneously Improving the Optical, Dielectric, and Solubility Properties of Fluorene-Based Polyimide with Silyl Ether Side Groups. ACS OMEGA 2022; 7:11939-11945. [PMID: 35449909 PMCID: PMC9016839 DOI: 10.1021/acsomega.2c00069] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 03/18/2022] [Indexed: 06/14/2023]
Abstract
Three fluorene-based polyimides with silyl ether groups (Si-PIs) were successfully synthesized by a simple and efficient silicon etherification reaction of hydroxyl-containing polyimides (OH-PIs) and tert-butylchlorodiphenylsilane (TBDPSCl), and their structures were confirmed by 1H NMR and IR spectra. The bulky nonpolar tert-butyldiphenylsilyl (TBDPS) side groups in the modified PI unit instead of the strong electron donor -OH group is conducive to decreasing electronic conjugation and charge transfer (CT) interaction along the PI chain. Accordingly, the optical, dielectric, and solubility properties of the modified Si-PI films are simultaneously improved compared with the precursor OH-PI films. The modified Si-PI films demonstrate a meaningful enhancement in the transmittances at a wavelength of 400 nm (T 400 ) to 74-81% from 42 to 55% of OH-PI films and the regeneration of fluorescence characteristics. The dielectric constant and loss of Si-PI films are also obviously reduced to 2.63-2.75 and 0.0024-0.0091 at 1 kHz from 4.19 to 4.78 and 0.0173-0.0295 of OH-PI films, respectively, due to substituted with the bulky nonpolar TBDPS groups to increase the free volume and hydrophobicity of Si-PI films. The solubility of Si-PIs in low- or nonpolar solvents (such as CHCl3, CH2Cl2, acetone, and toluene) is significantly improved. Furthermore, Si-PI films still maintain relatively good thermal properties with the 5% weight loss temperature (T 5% ) in the range 470-491 °C under a nitrogen atmosphere and the glass transition temperature (T g ) in the range 245-308 °C.
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Affiliation(s)
- Yancheng Wu
- Guangdong−Hong
Kong Joint Laboratory for New Textile Materials, School of Textile
Materials and Engineering, Wuyi University, Jiangmen, Guangdong 529020, P. R. China
- School
of Materials Science and Engineering, South
China University of Technology, Guangzhou, 510640, P. R. China
| | - Shumei Liu
- School
of Materials Science and Engineering, South
China University of Technology, Guangzhou, 510640, P. R. China
| | - Jianqing Zhao
- School
of Materials Science and Engineering, South
China University of Technology, Guangzhou, 510640, P. R. China
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24
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Multifunctional polyimide films with superheat-resistance, low coefficient of thermal expansion and fluorescence performance. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.124792] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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25
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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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26
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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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