Front Cover: In article number 2000085 by Jianqing Zhao and co‐workers, a cyclic‐olefin copolymer is employed as a crosslinking agent to prepare crosslinked semi‐aromatic polyimide films with improved molecular weight, which is expected to improve the semi‐aromatic polyimide films' mechanical and thermal properties, as well as keeping their good optical transparency.

中文翻译：

---

通过交联改善透明半芳族聚酰亚胺的机械和热性能

前盖：赵建清及其同事在编号为2000085的文章中，使用环烯烃共聚物作为交联剂来制备具有改善的分子量的交联半芳族聚酰亚胺薄膜，这有望改善半芳族聚酰亚胺薄膜机械和热性能，以及保持其良好的光学透明性。