Achieving Enhanced Optical Transparency and Low-dielectric Properties in Meta-substituted Copolyimides for Flexible Substrates

Zi-Yang Liu; Yan-Yu Gao; Cheng Wang; Qian-Qian Yu; Zhi-Long Zhang; Lin-Ge Wang

doi:10.1007/s10118-025-3505-5

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Achieving Enhanced Optical Transparency and Low-dielectric Properties in Meta-substituted Copolyimides for Flexible Substrates

RESEARCH ARTICLE | Updated：2026-01-30

- Achieving Enhanced Optical Transparency and Low-dielectric Properties in Meta-substituted Copolyimides for Flexible Substrates
- Chinese Journal of Polymer Science Vol. 44, Issue 2, Pages: 341-351(2026)
- Affiliations：
  
  a.South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, Guangdong Basic Research Center of Excellence for Energy and Information Polymer Materials, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
  b.School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
  c.Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center, Jieyang 522031, China
- Author bio：
  
  yanyugao@gdut.edu.cn (Y.Y.G.)
  zzhang@scut.edu.cn (Z.L.Z.)
  lingewang@scut.edu.cn (L.G.W.)
- Funds：
- DOI：10.1007/s10118-025-3505-5
  CLC：
- Received：08 October 2025，
  
  Revised：2025-11-09，
  
  Accepted：17 November 2025，
  
  Published Online：16 January 2026，
  
  Published：05 February 2026
- Accepted：
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Liu, Z. Y.; Gao, Y. Y.; Wang, C.; Yu, Q. Q.; Zhang, Z. L.; Wang, L. G. Achieving enhanced optical transparency and low-dielectric properties in meta-substituted copolyimides for flexible substrates. Chinese J. Polym. Sci. 2026, 44, 341–351

Zi-Yang Liu, Yan-Yu Gao, Cheng Wang, et al. Achieving Enhanced Optical Transparency and Low-dielectric Properties in Meta-substituted Copolyimides for Flexible Substrates[J]. Chinese Journal of Polymer Science, 2026, 44(2): 341-351.
Liu, Z. Y.; Gao, Y. Y.; Wang, C.; Yu, Q. Q.; Zhang, Z. L.; Wang, L. G. Achieving enhanced optical transparency and low-dielectric properties in meta-substituted copolyimides for flexible substrates. Chinese J. Polym. Sci. 2026, 44, 341–351 DOI： 10.1007/s10118-025-3505-5.

Zi-Yang Liu, Yan-Yu Gao, Cheng Wang, et al. Achieving Enhanced Optical Transparency and Low-dielectric Properties in Meta-substituted Copolyimides for Flexible Substrates[J]. Chinese Journal of Polymer Science, 2026, 44(2): 341-351. DOI： 10.1007/s10118-025-3505-5.

摘要

In this work

five colorless polyimides films exhibite concurrent low dielectric constant and high transparency

making them suitable candidates for next-generation flexible electronic substrates.

Abstract

The development of high-performance transparent substrates is critical for next-generation flexible electronic devices. Herein

we designed two novel meta-substituted diamines incorporating trifluoromethyl (―CF

) and methyl (―CH

) groups to synthesize colorless copolyimide (CPI) films

via

copolymerization with 4

4′-(hexafluoroisopropylidene)diphthalic anhydride (6FDA)/3

3′

4′-biphenyltetracarboxylic dianhydride (BPDA). The combination of meta-substituted architecture and substituents enables the simultaneous attainment of an ultralow dielectric constant (

) and high transparency. The meta-substitution geometry and electronic effects of ―CF

/―CH

effectively suppressed charge-transfer complex (CTC) formation

expanded fractional free volume (FFV)

and restricted

-electron conjugation

as validated by DFT calculations and wide-angle X-ray diffraction (WAXD) analysis. The optimized CPI film (PIA

-6FDA/BPDA(10/0)) achieved outstanding transmittance (

450

=88.15%)

ultralow dielectric constant (

=2.08 at 1 kHz)

and minimal dielectric loss (

=0.0012)

while maintaining robust thermal stability (

d5%

523 °C) and mechanical strength (

= 87.5 MPa). This work establishes a molecular engineering strategy to concurrently enhance the optical and dielectric properties

positioning meta-substituted CPIs as promising candidates for transparent flexible devic

es.

关键词

Keywords

references

Wan, B.; Dong, X.; Yang, X.; Wang, J.; Zheng, M. S.; Dang, Z. M.; Chen, G.; Zha, J. W. Rising of dynamic polyimide materials: a versatile dielectric for electrical and electronic applications. Adv. Mater. 2023 , 35 , 2301185..

Lim, H.; Cho, W. J.; Ha, C. S.; Ando, S.; Kim, Y. K.; Park, C. H.; Lee, K. Flexible organic electroluminescent devices based on fluorine-containing colorless polyimide substrates. Adv. Mater. 2002 , 14 , 1275−1279..

Min, H.; Kang, B.; Shin, Y. S.; Kim, B.; Lee, S. W.; Cho, J. H. Transparent and colorless polyimides containing multiple trifluoromethyl groups as gate insulators for flexible organic transistors with superior electrical stability. ACS Appl. Mater. Interfaces 2020 , 12 , 18739−18747..

Yang, P.; Liu, K.; Chen, Q.; Mo, X.; Zhou, Y.; Li, S.; Feng, G.; Zhou, J. Wearable thermocells based on gel electrolytes for the utilization of body heat. Angew. Chem. Int. Ed. 2016 , 55 , 12050−12053..

[Wang, G.; Huang, W.; Eastham, N. D.; Fabiano, S.; Manley, E. F.; Zeng, L.; Wang, B.; Zhang, X.; Chen, Z.; Li, R.; Chang, R. P. H.; Chen, L. X.; Bedzyk, M. J.; Melkonyan, F. S.; Facchetti, A.; Marks, T. J. Aggregation control in n atural brush-printed conjugated polymer films and implications for enhancing charge transport. Proc. Natl. Acad. Sci . 2017 , 114 , E10066−E10073..

Long, Y.; Chen, X.; Wu, H.; Zhou, Z.; Sriram Babu, S.; Wu, M.; Zhao, J.; Aldred, M. P.; Liu, S.; Chen, X.; Chi, Z.; Xu, J.; Zhang, Y. Rigidpolyimides with thermally activated delayed fluorescence for polymer light-emitting diodes with high external quantum efficiency up to 21%. Angew. Chem. Int. Ed. 2021 , 60 , 7220−7226..

[Gao, Y.; Sui, Y.; Liu, Z.; Tang, Z.; Zeng, X.; Su, X.; Wang, C.; Yu, Q.; Wang, L. Nacre-inspired coordination networks for transparent, ultra-stable polyimide films in flexible electronics. Adv. Funct. Mater . 2026 , 36, e13521..

Ruan, K.; Shi, X.; Zhang, Y.; Guo, Y.; Zhong, X.; Gu, J. Electric-field-induced alignment of functionalized carbon nanotubes inside thermally conductive liquid crystalline polyimide composite films. Angew. Chem. Int. Ed. 2023 , 62 , e202309010..

[Ruan, K.; Li, M.; Pang, Y.; He, M.; Guo, H.; Shi, X.; Gu, J. Molecular brush-grafted liquid crystalline hetero-structured fillers for boosting thermal conductivity of polyimide composite films. Adv. Funct. Mater . 2025 , 35, 2506563..

Song, T.; Min, Y. Lightweight 3D-net copper-plated polyimide current collector for lithium-ion batteries. ChemistryOpen 2025 , 14 , e202400018..

Yuan, H.; Liu, W.; Ge, H.; Pan, H.; Du, Q.; Zhang, H.; Song, J.; Tan, W.; Min, Y. Polyimides with an ultralow coefficient of thermal expansion enabled by electron-donating aromatic groups. ACS Appl. Polym. Mater. 2025 , 7 , 5952−5959..

Ando, S.; Matsuura, T.; Sasaki, S. Coloration of aromatic polyimides and electronic properties of their source materials. Polym. J. 1997 , 29 , 69−76..

Ahn, C.; Kim, T. Y.; Hong, P. H.; Choi, S.; Lee, Y.; Kwon, H.; Jeon, H.; Ko, D. W.; Park, I.; Han, H.; Hong, S. W. Highly transparent, colorless optical film with outstanding mechanical strength and folding reliability using mismatched charge-transfer complex intensification. Adv. Funct. Mater. 2022 , 32 , 2111040..

Zhang, Q.; Tsai, C. Y.; Li, L. J.; Liaw, D. J. Colorless-to-Colorful Switching Electrochromic Polyimides with Very High Contrast Ratio. Nat. Commun. 2019 , 10 , 1239..

Zhang, S.; He, X.; Xiao, P.; Xia, X.; Zheng, F.; Xiang, S.; Lu, Q. Interpretable machine learning for investigating the molecular mechanisms governing the transparency of colorless transparent polyimide for OLED cover windows. Adv. Funct. Mater. 2024 , 34 , 2409143..

Peng, W. F.; Lei, H. Y.; Zhang, X. X.; Qiu, L. H.; Huang, M. J. Fluorine substitution effect on the material properties in transparent aromatic polyimides. Chinese J. Polym. Sci. 2022 , 40 , 781−788..

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 , 273 , 125883..

Yang, L.; Xing, J.; Fang, X.; Chen, G. Transparent polyamide-imides containing fluorene groupswith high glass transition temperature and good dimensional stability. Mater. Today Commun. 2025 , 47 , 113215..

Ozawa, H.; Ishiguro, E.; Kyoya, Y.; Kikuchi, Y. ; Matsumoto, T. Colorless polyimides derived from an alicyclic tetracarboxylic dianhydride, CpODA. Polymers 2021 , 13 , 2824..

Huang, W.; Yan, D.; Lu, Q. Synthesis and characterization of a highly soluble aromatic polyimide from 4,4′-methylenebis(2-tert-butylaniline). Macromol. Rapid Commun. 2001 , 22 , 1481−1484..

Kim, S. J.; Kang, I.; Byun, T.; So, J.; Kim, S. Y. Highly transparent aromatic polyamides from unsymmetrical diamine with trifluoromethyl groups. Polymers 2022 , 14 , 501..

Zuo, H.-T.; Gan, F.; Dong, J.; Zhang, P.; Zhao, X.; Zhang, Q. H. Highly transparent and colorless polyimide film with low dielectric constant by introducing meta-substituted structure and trifluoromethyl groups. Chinese J. Polym. Sci. 2021 , 39 , 455−464..

Lei, H.; Bao, F.; Peng, W.; Qiu, L.; Zou, B.; Huang, M. Torsion effect of the imide ring on the performance of transparent polyimide films with methyl-substituted phenylenediamine. Polym. Chem. 2022 , 13 , 6606−6613..

Yang, C. P.; Su, Y. Y. Novel organosoluble and colorless poly(ether imide)s based on 3,3-bis[4-(3,4-dicarboxyphenoxy)phenyl ] phthalide dianhydride and aromatic bis(ether amine)s bearing pendent trifluoromethyl groups. J. Polym. Sci. Part Polym. Chem. 2006 , 44 , 3140−3152..

Kaya, İ.; Kamacı, M. Synthesis, optical, and thermal properties of polyimides containing flexible ether linkage. J. Appl. Polym. Sci. 2018 , 135 , 46573..

Zuo, H.; Chen, Y.; Qian, G.; Yao, F.; Li, H.; Dong, J.; Zhao, X.; Zhang, Q. Effect of Simultaneously introduced bulky pendent group and amide unit on optical transparency and dimensional stability of polyimide film. Eur. Polym. J. 2022 , 173 , 111317..

Chen, Y.; Liu, Y.; Min, Y. Innovative polyimide modifications for aerospace and optoelectronic applications: synergistic enhancements in thermal, mechanical, and optical properties. ACS Appl. Mater. Interfaces 2025 , 17 , 16016−16026..

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 , 191 , 112030..

Kim, Y. H.; Kim, H. S.; Kwon, S. K. Synthesis and characterization of highly soluble and oxygen permeable new polyimides based on twisted biphenyl dianhydride and spirobifluorene diamine. Macromolecules 2005 , 38 , 7950−7956..

Li, F.; Wang, Y.; Li, J.; Xie, H.; Wang, J. Soluble, colorless and biobased polyimides with high thermal stability derived from renewable anethole. J. Mater. Chem. C 2025 , 13 , 12783−12792..

Gao, Y.; Peng, W.; Wei, J.; Guo, D.; Zhang, Y.; Yu, Q.; Wang, C.; Wang, L. Synthesis of high-performance colorless polyimides with asymmetric diamine: application in flexible electronic devices. ACS Appl. Mater. Interfaces 2024 , 16 , 48005−48015..

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 2024 , 16 , 2315..

Zhuang, Y.; Seong, J. G.; Lee, Y. M. Polyimides Containing aliphatic/alicyclic segments in the main chains. Prog. Polym. Sci. 2019 , 92 , 35−88..

Hasegawa, M.; Fujii, M.; Ishii, J.; Yamaguchi, S.; Takezawa, E.; Kagayama, T.; Ishikawa, A. Colorless polyimides derived from 1 S ,2 S ,4 R ,5 R -cyclohexanetetracarboxylic dianhydride, self-orientation behavior during solution casting, and their optoelectronic applications. Polymer 2014 , 55 , 4693−4708..

Ghosh, G.; Meeseepong, M.; Bag, A.; Hanif, A.; Chinnamani, M. V.; Beigtan, M.; Kim, Y.; Lee, N. E. Tough, transparent, biocompatible and stretchable thermoplastic copolymer with high stability and processability forsoft electronics. Mater. Today 2022 , 57 , 43−56..

Kim, S. D.; Ka, D.; Chung, I. S.; Kim, S. Y. Poly(arylene ether)s with low refractive indices: poly(biphenylene oxide)s with trifluoromethyl pendant groups via a meta-activated nitro displacement reaction. Macromolecules 2012 , 45 , 3023−3031..

Lei, H.; Li, X.; Wang, J.; Song, Y.; Tian, G.; Huang, M.; Wu, D. DFT and molecular dynamic simulation for the dielectric property analysis of polyimides. Chem. Phys. Lett. 2022 , 786 , 139131..

He, J.; Wu, X.; Cheng, Y. Low dielectric post-cured benzocyclobutene-functionalized fluorine-containing polyimide material. Eur. Polym. J. 2023 , 196 , 112334..

Yi, C.; Li, W.; Shi, S.; He, K.; Ma, P.; Chen, M.; Yang, C. High-temperature-resistant and colorless polyimide: preparations, properties, and applications. Sol. Energy 2020 , 195 , 340−354..

Li, Y.; Zhao, J.; Zhao, F.; Li, F.; Dai, C.; Chen, C.; Yang, Z.; Tu, G. Synergistic enhancement of mechanical and dielectric properties in transparent polyimides by regulating hydrogen bonding and microbranched cross-linking structure. ACS Appl. Polym. Mater. 2024 , 6 , 10738−10749..

Dong, W.; Guan, Y.; Shang, D. Novel soluble polyimides containing pyridine and fluorinated units: preparation, characterization, and optical and dielectric properties. RSC Adv. 2016 , 6 , 21662−21671..

Chen, H.; Li, F.; Xiong, J.; Wang, J. In situ preparation of siloxane-linked colorless polyimides with low dielectric constant. ACS Appl. Polym. Mater. 2025 , 7 , 3157−3163..

Fan, H.; Xie, T.; Wang, C.; Zhang, Y.; Pan, S.; Li, J.; Zhang, Y.; Guan, S.; Yao, H. Low-dielectric polyimide constructed by integrated strategy containing main-chain and crosslinking network engineering. Polymer 2023 , 279 , 126035..

Zhang, C.; He, X.; Lu, Q. The structure design of poly(ester imide)s with low dielectric loss and high mechanical properties. J. Mater. Chem. C 2025 , 13 , 1388−1394..

Alamri, A.; Wu, C.; Nasreen, S.; Tran, H.; Yassin, O.; Gentile, R.; Kamal, D.; Ramprasad, R.; Cao, Y.; Sotzing, G. High dielectric constant and high breakdown strength polyimide via tin complexation of the polyamide acid precursor. RSC Adv. 2022 , 12 , 9095−9100..

Peng, W.; Lei, H.; Qiu, L.; Bao, F.; Huang, M. Perfluorocyclobutyl-containing transparent polyimides with low dielectric constant and low dielectric loss. Polym. Chem. 2022 , 13 , 3949−3955..

Zuo, H.; Qian, G.; Li, H. B.; 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 , 13 , 2999−3008..

Chern, Y. T.; Tsai, J. Y. Low dielectric constant and high organosolubility of novel polyimide derived from unsymmetric 1,4-bis(4-aminophenoxy)-2,6-di-tert-butylbenzene. Macromolecules 2008 , 41 , 9556−9564..

Chen, H.; Wu, Q.; Chen, L.; Zhang, W.; Li, X.; Peng, J.; Wang, J. Dual-processable semi-aromatic fluorinated polyimides with outstanding optical transparency and low dielectric constants prepared from in situ [2 + 2 ] thermal polymerization. Polym. Chem. 2024 , 15 , 3492−3500..

Lian, R.; Lei, X.; Xiao, Y.; Xue, S.; Xiong, G.; Zhang, Z.; Yan, D.; Zhang, Q. Synthesis and properties of colorless copolyimides derived from 4,4′-diaminodiphenyl ether-based diamines withdifferent substituents. Polym. Chem. 2021 , 12 , 4803−4811..

Fang, Y.; He, X.; Kang, J. C.; Wang, L.; Ding, T. M.; Lu, X.; Zhang, S. Y.; Lu, Q. Terphenyl-based colorless and heat-resistant polyimides with a controlled molecular structure using methyl side groups. Polym. Chem. 2022 , 13 , 5105−5115..

Bao, F.; Qiu, L.; Zou, B.; Lei, H.; Peng, W.; Cheng, S. Z. D.; Huang, M. Development of fluorinated colorless polyimides of restricted dihedral rotation toward flexible substrates with thermal robustness. Macromolecules 2024 , 57 , 3568−3579..

Qian, C.; Bei, R.; Zhu, T.; Zheng, W.; Liu, S.; Chi, Z.; Aldred, Matthew. P.; Chen, X.; Zhang, Y.; Xu, J. Facile strategy for intrinsic low-k dielectric polymers: molecular design based on secondary relaxation behavior. Macromolecules 2019 , 52 , 4601−4609..

Sava, I.; Damaceanu, M. D.; Constantin, C. P.; Asandulesa, M.; Wolińska-Grabczyk, A.; Jankowski, A. Structure–promoted high performance properties of triphenylmethane—containing polyimides and copolyimides. Eur. Polym. J. 2018 , 108 , 554−569..

Chen, Y.; Liu, Y.; Min, Y. Reducing the permittivity of polyimides for better use in communication devices. Polymers 2023 , 15 , 1256..

Gong, C.; Liu, Z.; Tao, Z.; Xu, A.; Xie, H.; Fang, Q.; Qiu, Z.; Yan, Y. High-performance polyimides derived from biomass: design, synthesis, and properties. ACS Sustain. Chem. Eng. 2023 , 11 , 4789−4799..

Li, F.; Ge, J. J.; Honigfort, P. S.; Fang, S.; Chen, J. C.; Harris, F. W.; Cheng, S. Z. D. Dianhydride architectural effects on the relaxation behaviors and thermal and optical properties of organo-soluble aromatic polyimide films. Polymer 1999 , 40 , 4987−5002..

Arnold, F. E.; Shen, D.; Lee, C. J.; Harris, F. W.; Cheng, S. Z. D.; Lau, S. F. Organo-soluble segmented rigid-rod polyimide films. Part 4.—anisotropic structure and properties. J. Mater. Chem. 1993 , 3 , 353−360..

Arnold, F. E.; Shen, D.; Lee, C. J.; Harris, F. W.; Cheng, S. Z. D.; Starkweather, H. W. organo-soluble segmented rigid-rod polyimide films. Part 3.—effects of copolymer composition on thermal expansivity and on relaxation processes. J. Mater. Chem. 1993 , 3 , 183−190..

Miyane, S.; Chen, C. K.; Lin, Y. C.; Ueda, M.; Chen, W. C. Thermally stable colorless copolyimides with a low dielectric constant and dissipation factor and their organic field-effect transistor applications. ACS Appl. Polym. Mater. 2021 , 3 , 3153−3163..

Lv, P.; Dong, Z.; Dai, X.; Qiu, X. Flexible polydimethylsiloxane-based porous polyimide films with a n ultralow dielectric constant and remarkable water resistance. ACS Appl. Polym. Mater. 2019 , 1 , 2597−2605..

Hasegawa, M.; Tominaga, A. Fluorene-containing poly(ester imide)s and their application to positive-type photosensitive heat-resistant materials. Macromol. Mater. Eng. 2011 , 296 , 1002−1017..

Wu, Y.; Chen, Z.; Ji, J.; Zhou, Y.; Huang, H.; Liu, S.; Zhao, J. Multifunctional polyimides by direct silyl ether reaction of pendant hydroxy groups: toward low dielectric constant, high optical transparency and fluorescence. Eur. Polym. J. 2020 , 132 , 109742..

Nagella, S. R.; Park, S. S.; Chitumalla, R. K.; Jang, J.; Ha, C. S. Intrinsic low-dielectric-constant polyimides based on a novel diamine having −CF 3 groups and kinkable 1,4-diisopropylbenzene units. Polym. Int. 2024 , 73 , 238−247..

Sharma, A.; Quamara, J. K. Dielectric constant/loss measurements in pristine and 75 MeV oxygen-ion irradiated Kapton-H polyimide. Radiat. Eff. Defects Solids 2007 , 162 , 1−10..

Maie r, G. Low dielectric constant polymers for microelectronics. Prog. Polym. Sci. 2001 , 26 , 3−65..

He, X.; Zhang, S.; Zhou, Y.; Zheng, F.; Lu, Q. The “fluorine impact” on dielectric constant of polyimides: a molecular simulation study. Polymer 2022 , 254 , 125073..

Tong, H.; Hu, C.; Yang, S.; Ma, Y.; Guo, H.; Fan, L. Preparation of fluorinated polyimides with bulky structure and their gas separation performance correlated with microstructure. Polymer 2015 , 69 , 138−147..

Liu, Y.; Qian, C.; Qu, L.; Wu, Y.; Zhang, Y.; Wu, X.; Zou, B.; Chen, W.; Chen, Z.; Chi, Z.; Liu, S.; Chen, X.; Xu, J. A bulk dielectric polymer film with intrinsic ultralow dielectric constant and outstanding comprehensive properties. Chem. Mater. 2015 , 27 , 6543−6549..

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