热致液晶共聚酯的熔融行为及结晶结构研究

Studies on the Melting Behavior and Crystal Structure of Thermotropic Liquid Crystalline Copolyesters

采用ＤＳＣ及ＷＡＸＤ手段对含对羟基苯甲酸热致液晶共聚酯的相变行为及结晶结构进行了初步研究。结果表明，聚合物中存在两种同属于正交晶系的不同堆积形态结晶结构。

The melting behavior and crystal structure of thermotropic liquid crystalline copolyesters, which were synthesized by melt polycondensation from bis(4-hydroxyphenyl) methanone, terephthalic acid, p-hydroxybenzoic acid and aliphatic diols, were investigated. The results proved that there existed two crystal forms in the crystal structure of these copolyesters, which showed two endotherms on the DSC curves. Furthermore, degree of crystallinity and crystal size of these copolyesters were studied.