异构化聚酰亚胺取向膜预倾角的研究

Pretilt Angle for Isomeric Alignment Films of Polyimide

制备了一系列异构化的聚酰亚胺取向膜,并用晶体旋转法测定了它们的预倾角。发现由芳香类异构化二酐制得的聚酰亚胺膜对预倾角影响不大,而由环己烷类顺反异构化二酐制得的聚酰亚胺膜的预倾角变化较大,且顺式的比反式的大。

A series of isomeric alignment films of polyimide were prepared in our laboratory, the pretilt angle of each film was measured by the crystalrotation method. It was found that the pretilt angles ofpolyimide films prepared from different isomeric aromatic dianhydrides changed lowerly, those fromisomeric cyclohexane dianhydrides changed greatly, and the pretilt angle of cisdianhydride was greater than that of corresponding transdianhydride. 