Liquid Crystal Structures and Phase Transitions of Copolyesters

Chinese Journal of Applied Chemistry ›› 1994, Vol. 0 ›› Issue (3): 36-39.

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Liquid Crystal Structures and Phase Transitions of Copolyesters

Wang Yong, Wu Dacheng, Li Ruixia, Xie Xinguang

Textile College, Chengdu University of Science and Technology, Chengdu 610065

Received:1993-09-18 Revised:1993-12-06 Published:1994-06-10 Online:1994-06-10

Abstract

Abstract: The strtictures and phase transitions of thermotropic liquid crystalline aromaticcopolyesters based on p-hydroxy-benzoic acid (PHB),terephthalic acid (TPA) and bisphenol A(BPA) were studied by DSC,WAXD,and hot stage polarized microscopy.The effects of annealing and shearing on the microstructures and seqtience structures of the copolyesters were discussed emphatically,The two glass transition temperatures occurred in sample with 50% PHB bave been discussed.

Key words: thermotropic liquid crystalline copolyester, microstructure, oriented structure, glass transition

Wang Yong, Wu Dacheng, Li Ruixia, Xie Xinguang. Liquid Crystal Structures and Phase Transitions of Copolyesters[J]. Chinese Journal of Applied Chemistry, 1994, 0(3): 36-39.

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