Citation: De Wen DONG, Yu Shan NI. SYNTHESIS AND PROPERTIES OF THERMOTROPIC LIQUID CRYSTALLINE COPOLYESTERS CONTAINING BIS(4-HYDROXYPHENYL) METHANONE(Ⅴ)[J]. Chinese Chemical Letters, ;1995, 6(11): 951-954. shu

SYNTHESIS AND PROPERTIES OF THERMOTROPIC LIQUID CRYSTALLINE COPOLYESTERS CONTAINING BIS(4-HYDROXYPHENYL) METHANONE(Ⅴ)

De Wen DONG ,
Yu Shan NI

Changchun Institute of Applied Chemistry, Academia Sinica, Changchun 130022

Received Date: 5 January 1995

Fund Project: The support of this study by the National Natural Science Foundation of China is highly appreciated.

A new series of fully aromatic thermotropic liquid crystalline copolyesters were synthesized by thermal polycondensation of p-hydroxybenzoic acid [PHB],terephthalic acid [TPA],resorcinol [RES] and bis (4-hydroxyphenyl) methanone [BHP].The DSC traces of copolyesters exhibited two or three endotherms,the low temperature endotherm(Tm) of which indicated the transition from solid state to anisotropic phase.Observation under polarizing microscope and WAXD measurements suggested that the LC-phase formed immediately above Tm had a nematic character.
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