当前位置: X-MOL 学术Chinese. J. Polym. Sci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Structures and Properties of Polyimide with Different Pre-imidization Degrees
Chinese Journal of Polymer Science ( IF 4.3 ) Pub Date : 2020-04-27 , DOI: 10.1007/s10118-020-2407-9
Fu-Yao Hao , Jian-Hua Wang , Sheng-Li Qi , Guo-Feng Tian , De-Zhen Wu

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.



中文翻译:

预酰亚胺化度不同的聚酰亚胺的结构与性能

通过化学预酰亚胺化制备了一系列由均苯四甲酸二酐(PMDA)和4,4'-氧二苯胺(ODA)衍生的聚酰亚胺(PI)膜,发现预酰亚胺化度(pre-ID)有影响所得薄膜的结构和性能 具体而言,一定程度的化学酰亚胺化可以促进薄膜内部分子链的面内取向,从而提高薄膜的机械强度并降低薄膜的热膨胀系数(CTE)。此外,这种预酰亚胺化过程可能扩大膜内部的内部间隙,从而降低其介电常数和玻璃化转变温度。我们的研究提供了一种通过化学酰亚胺化制备高性能PI薄膜的新方法。

更新日期:2020-06-30
down
wechat
bug