Study on Structure and Crystallinity of A New Biodegradable Aliphatic-Aromatic Copolyester  

作　　者：Wang Xiaohui Shi Jun Chen Ying Fu Zhifeng Shi Yan 

机构地区：[1]State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beo＇ing 100029 [2]Liaoyang Petrochemical Company, PetroChina Company Limited, Liaoyang 111003

出　　处：《China Petroleum Processing & Petrochemical Technology》2011年第4期64-69,共6页中国炼油与石油化工（英文版）

摘　　要：A series of biodegradable aliphatic-aromatic copolyesters, poly(butylene terephthalate-co-butylene adipate-co- ethylene terephthalate-co-ethylene adipate) (PBATE), were synthesized from terephthalic acid (PTA), adipic acid (AA), 1,4-butanediol (BG) and ethylene glycol (EG) through direct esterification and polycondensation. The sequence structure and crystallinity of the copolyester were investigated by 1H NMR spectroscopy and the wide-angle X-ray diffractometry (WAXD). The analytical results showed that the PBATE copolyester was a random copolymer and the composition of PBATE copolyester was almost consistent with the feed molar ratios. The crystal structure of PBATE copolyester belonged to the triclinic crystalline system; The variation in melting point of the synthesized PBATE copolyester agreed well with the estimation obtained by the Flory equation and was applicable to the random copolymer.A series of biodegradable aliphatic-aromatic copolyesters, poly（butylene terephthalate-co-butylene adipate-coethylene terephthalate-co-ethylene adipate） （PBATE）, were synthesized from terephthalic acid （PTA）, adipic acid （AA）, 1,4-butanediol （BG） and ethylene glycol （EG） through direct esterification and polycondensation. The sequence structure and crystallinity of the copolyester were investigated by 1H NMR spectroscopy and the wide-angle X-ray diffractometry （WAXD）. The analytical results showed that the PBATE copolyester was a random copolymer and the composition of PBATE copolyester was almost consistent with the feed molar ratios. The crystal structure of PBATE copolyester belonged to the triclinic crystalline system; The variation in melting point of the synthesized PBATE copolyester agreed well with the estimation obtained by the Flory equation and was applicable to the random copolymer.

关 键 词：biodegradable polyester sequence structure CRYSTALLINITY ALIPHATIC AROMATIC 

分 类 号：TQ340.13[化学工程—化纤工业] TQ323.8