According to the differences of molecular design,the recent progress of soluble polyimides on seven aspects such as bringing flexible groups,bulky side groups,non-coplanar structures,fluorine-containing groups as well as asymmetric structures into the main chain of molecules,copolymerization and preparing hyperbranched polyimides were introduced. Meanwhile,the reasons why these methods could improve the solubility of polyimides were discussed on the molecular level.% 根据分子设计思路的不同，分别从分子主链引入柔性基团、大的侧基、非共平面结构、含氟基团、不对称结构，共聚以及制备超支化聚酰亚胺等7个方面介绍了近年来制备可溶性聚酰亚胺的研究进展，并在分子水平上讨论了各方法能够改善聚酰亚胺溶解性的原因。
展开▼
