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《Engineering Plastics Application》 2005-11
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SYNTHESIS OF THERMOTROPIC LIQUID CRYSTAL COPOLYESTER OF PBT-PHB

Li Xiaolan, Wang Jiufen, Huang Fusheng (Department of Chemical Engineering, North University of China, Taiyuan 030051, China)  
1,4-butanediol bi-hydroxybenzoated (BBHB) was synthesized from mythyl p-hydroxybenzoate and 1,4-butanediol with the existence of catalyst and stabilizer; di-butanediol terephalate (DBT) was prepared from dimethyl p-phalate and 1,4-butanwdiol. Copolyester of PBT-PHB were synthesized from BBHB and DBT. The best reaction condition and formula were decided by orthogonal experiment. The melting point, liquid crystal temperature range and structure of the copolyester were determined by melting point determination apparatus collocating polarizing microscope and infra-red spectrometer. The viscometric average molecular weight (M_v) was calculated by using the coincidence relation between viscosity and M_v.
【CateGory Index】: TQ320
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