Structures and Properties of Polyimide with Different Pre-imidization Degrees

Fu-Yao Hao; Jian-Hua Wang; Sheng-Li Qi; Guo-Feng Tian; De-Zhen Wu

doi:10.1007/s10118-020-2407-9

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Structures and Properties of Polyimide with Different Pre-imidization Degrees

ARTICLE | Updated：2020-04-27

- Structures and Properties of Polyimide with Different Pre-imidization Degrees
- Structures and Properties of Polyimide with Different Pre-imidization Degrees
- Chinese Journal of Polymer Science 2020年38卷第8期页码：840-846
- Affiliations：
  
  State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
- Author bio：
  
  tiangf@mail.buct.edu.cn
- Funds：
  
  This work was financially supported by the National Key Research and Development Program of China (No. 2017YFB0308103), the National Natural Science Foundation of China (No. 51773007), and the Fundamental Research Funds for the Central Universities (No. XK1802-2).
- DOI：10.1007/s10118-020-2407-9
  中图分类号：
- 收稿：2019-12-23，
  
  修回：2020-2-9，
  
  录用：2020-2-19，
  
  网络首发：2020-04-27，
  
  纸质出版：2020-08
- Accepted：
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Hao, F. Y.; Wang, J. H.; Qi, S. L.; Tian, G. F.; Wu, D. Z. Structures and properties of polyimide with different pre-imidization degrees. Chinese J. Polym. Sci. 2020, 38, 840–846

Fu-Yao Hao, Jian-Hua Wang, Sheng-Li Qi, et al. Structures and Properties of Polyimide with Different Pre-imidization Degrees[J]. Chinese Journal of Polymer Science, 2020, 38(8): 840-846.
Hao, F. Y.; Wang, J. H.; Qi, S. L.; Tian, G. F.; Wu, D. Z. Structures and properties of polyimide with different pre-imidization degrees. Chinese J. Polym. Sci. 2020, 38, 840–846 DOI： 10.1007/s10118-020-2407-9.

Fu-Yao Hao, Jian-Hua Wang, Sheng-Li Qi, et al. Structures and Properties of Polyimide with Different Pre-imidization Degrees[J]. Chinese Journal of Polymer Science, 2020, 38(8): 840-846. DOI： 10.1007/s10118-020-2407-9.

摘要

Abstract

A series of polyimide (PI) films derived from pyromellitic dianhydride (PMDA) and 4

4′-oxydianiline (ODA) were prepared with the employment of chemical pre-imidization

and the pre-imidization degree (pre-ID) was found influential on structures and properties of the films obtained. Specifically

a certain degree of chemical imidization could promote the in-plane orientation of molecular chains inside the film

which then enhanced the mechanical strength and reduced the coefficient of thermal expansion (CTE) of the films. Further

such pre-imidization process could expand the internal space gap inside the films

thereby lowering their dielectric constant and glass transition temperature. Our study provides a new approach for preparing high-performance PI films through chemical imidization.

关键词

Keywords

references

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