Citation: ZHANG Hongzhi, NING Xin. STUDIES ON THERMOTROPIC LIQUID CRYSTALLINE COPOLYESTERS-POLY (ARYLENE TEREPHTHALATE-CO-BUTYLENE TEREPHTHALATE)*[J]. Chinese Journal of Polymer Science, ;1986, 4(3): 248-255. shu

STUDIES ON THERMOTROPIC LIQUID CRYSTALLINE COPOLYESTERS-POLY (ARYLENE TEREPHTHALATE-CO-BUTYLENE TEREPHTHALATE)*

ZHANG Hongzhi ,
NING Xin

Received Date: 7 September 1985

A series of copolyesters based on bis(4-hydroxybutyl) terephthalate, terephthaloyl chloride andvarious aromatic diols (i.e. hydroquinone, chlorohydroquinone, bromohydroquinone or dihydroxybi-phenyl) was prepared. 1H-NMR studies revealed that the monomer units had microstructures closeto random distribution in the chains. The copolymers showed composition-dependent liquid crystal-line properties as verified by visual observation of stir opalescence, polarizing microscope, DSC andX-ray diffration. The copolyesters with aromatic diol contents over a certain extent(for chloro-hydroquinone m≥0.33) were thermotropic with wide liquid crystalline temperature ranges.The introduction of chlorohydroquinone into the copolyesters could gradually destroy the crystallinity of the polymers but retain the liquid crystalline characteristics.
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