以3,5-二硝基苯甲酰氯、雌二醇及溴代正辛烷为原料合成了含有稠环结构的新型功能性二胺(H8-c).用1,2,3,4-环丁烷四甲酸二酐(CBDA)、对苯二胺(PDA)及H8-c共聚制备了一种聚酰亚胺(PI)液晶垂直取向剂.该PI膜作为取向层制得的液晶盒,在120℃下烘烤12 h仍可垂直取向,拥有良好的垂直取向热稳定性.热重分析(TGA)测试表明其具有良好的热稳定性,在氮气中,这种PI的5％热失重温度(T5)和10％热失重温度(T10)分别高达400℃和480℃.紫外可见光谱(UV-vis)显示此PI膜在400 nm以上具有高的透过率,可达95％以上.
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