Crosslinked Colorless Polyimide Films <italic style="font-style: italic">via</italic> Oxazole Groups as Crosslinking Agent: Preparation and Properties

He Wang; Zhen-Chao Liu; Xue Shang; Li-Dong Feng; Xin-Chao Bian; Xue-Si Chen

doi:10.1007/s10118-024-3235-0

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Crosslinked Colorless Polyimide Films via Oxazole Groups as Crosslinking Agent: Preparation and Properties

RESEARCH ARTICLE | Updated：2024-12-03

- Crosslinked Colorless Polyimide Films via Oxazole Groups as Crosslinking Agent: Preparation and Properties
- Chinese Journal of Polymer Science Vol. 42, Issue 12, Pages: 1905-1914(2024)
- Affiliations：
  
  a.School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China
  b.Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- Author bio：
  
  fengld@ciac.ac.cn (L.D.F.)
  xschen@ciac.ac.cn (X.S.C.)
- Funds：
- DOI：10.1007/s10118-024-3235-0
  CLC：
- Published：01 December 2024，
  
  Published Online：11 November 2024，
  
  Received：03 May 2024，
  
  Revised：06 September 2024，
  
  Accepted：11 September 2024
- Accepted：
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Wang, H.; Liu, Z. C.; Shang, X.; Feng, L. D.; Bian, X. C.; Chen, X. S. Crosslinked colorless polyimide films via oxazole groups as crosslinking agent: preparation and properties. Chinese J. Polym. Sci. 2024, 42, 1905–1914

HE WANG, ZHEN-CHAO LIU, XUE SHANG, et al. Crosslinked Colorless Polyimide Films via Oxazole Groups as Crosslinking Agent: Preparation and Properties. [J]. Chinese journal of polymer science, 2024, 42(12): 1905-1914.
Wang, H.; Liu, Z. C.; Shang, X.; Feng, L. D.; Bian, X. C.; Chen, X. S. Crosslinked colorless polyimide films via oxazole groups as crosslinking agent: preparation and properties. Chinese J. Polym. Sci. 2024, 42, 1905–1914 DOI： 10.1007/s10118-024-3235-0.

HE WANG, ZHEN-CHAO LIU, XUE SHANG, et al. Crosslinked Colorless Polyimide Films via Oxazole Groups as Crosslinking Agent: Preparation and Properties. [J]. Chinese journal of polymer science, 2024, 42(12): 1905-1914. DOI： 10.1007/s10118-024-3235-0.

摘要

A series of crosslinked CPI films were prepared by incorporating 1

3-PBO as a crosslinking agent. The reaction between oxazole and carboxyl groups forms crosslinked structures

while partially transforms the rigid imide rings into more flexible groups. This approach provides an efficient strategy to enhance the comprehensive performance of CPI by balancing the formation of crosslinks with chain flexibility.

Abstract

A series of transparent crosslinked colorless polyimide (CPI) films are prepared from 3

3’

4’-biphenyltetracarboxylic dianhydride (BPDA)

2’-bis(trifluoro-methyl)benzidine (TFMB)

and 4

4’-oxydianiline (ODA) by thermal imidization

incorporating varying contents of 2

2'-(1

3-phenylene)bis(2-oxazoline) (1

3-PBO) as the crosslinking agent. Following the incorporation of the crosslinking structure

the CPI films show good optical transparency (approximately 85% winthin visible light range)

enhanced glass transition temperature (from 325 °C to 341 °C)

and improved thermal stability

and tensile strength. Notably

compared with the pristine uncrosslinked CPI

these crosslinked CPI films significantly increase in elongation at break (from 5.4% to 44.2%). Furthermore

the new approach ensures that crosslinked CPIs improve heat resistance and mechanical properties

while avoiding the embrittlement of materials. This study also offeres straightforward preparation methods for optically transparent crosslinked polyimides without additional processing steps. All these results make this approach can effectively improve the competitive performance of the CPI films for potential applications in microelectronic and optoelectronic fields.

关键词

Keywords

PolyimideColorless transparent filmCrossking structureOptical propertyThermal propertyMechanical property

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⁰

Crosslinked Colorless Polyimide Films via Oxazole Groups as Crosslinking Agent: Preparation and Properties

DOI：10.1007/s10118-024-3235-0

摘要

Abstract

关键词

Keywords

references