全芳香族共聚酯的结构和其液晶行为研究

A STUDY ON THE STRUCTURE AND LIQUID CRYSTALLINE BEHAVIOR OF WHOLLY AROMATIC COPOLYESTERS

本文对不同组成的对苯二甲酸(TPA),对羟基苯甲酸(PHBA),联苯二酚(BP),间苯二甲酸(IPA)共聚酯采用热台偏光显微镜、电子显微镜、X-射线衍射、激光小角散射、差热等技术进行了研究.实验结果表明,在一定的组成范围内共聚酯熔体有很好的液晶性.重点讨论了分子组成、转变行为、液晶性的关系,并对液晶相的形态结构进行了表征.

Wholly aromatic polyesters with different composition in main chain have been investigated by several methods such as hot-stage polarized light microscopy, X-ray diffraction, small angle laser scattering techniques, DSG, etc. The results showed that the melted copolyesters exhibit good liquid crystallinity in some range of the copolyester compositions, this report is focus on the relations of molecular composition-transitions-liquid crystallinity and morphologic features of mesophase.