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合成了含液晶基元侧基的二氨基化合物——— 3,5 二氨基苯甲酸 4′ 联苯酯 ,并以 3,3′ 4,4′ 二苯醚四羧酸二酐 (ODPA)、二氨基二苯醚 (ODA)为共聚单体 ,制备了具有液晶侧链原位复合自增强功能的新型聚酰亚胺 (PI)薄膜材料 .这种含液晶基元侧链的PI能溶解在极性非质子有机溶剂中 ,显示出良好的可加工性能 .由于液晶基元侧链的原位复合自增强作用 ,该类膜材料显示出良好的力学性能和热稳定性能在热台偏光显微镜下观察 ,该类聚合物在较高的温度区域内显示液晶行为 ,并呈现向列相织构
A novel diamino compound (3,5-diaminobenzoic acid), which is a diamino compound with side groups of the liquid crystal, was synthesized. The 4,4 ’diphenyl ether tetracarboxylic dianhydride (ODPA) A novel polyimide (PI) thin film material with in-situ self-enhancement of liquid crystal side-chain was prepared by using diaminodiphenyl ether (ODA) as comonomer.The PI of this liquid crystal- Polar aprotic organic solvents, showing good processability due to the self-enhancement of the liquid crystal element side-chain self-strengthening, the type of film material shows good mechanical properties and thermal stability of the hot stage polarizing microscope It is observed that this type of polymer shows liquid crystal behavior in a higher temperature region and exhibits nematic phase texture