Polycondensation reaction of p-acetoxybenzoic acid and poly(ethylene   terephthalate) and the formation of ether bonds

CORC > 北京大学 > 化学与分子工程学院

	Polycondensation reaction of p-acetoxybenzoic acid and poly(ethylene terephthalate) and the formation of ether bonds
	Li, Y ; Wang, K ; Zhang, GL ; Zhang, HZ
刊名	高等学校化学学报
	1996
关键词	liquid crystalline copolyester poly(4-oxybenzoate-co-ethylene terephthalate) acetate transesterification reaction HYDROXYBENZOIC ACID
英文摘要	The transesterification reaction of acetates and etherification reaction during the polycondensation reaction of p-acetoxybenzoic acid(Ac-PHB) and poly(ethylene terephthalate) were studied by analyzing the reaction mixture sampled after different reaction time by H-1 NMR spectra and [eta] determination. Just in the beginning of the polycondensation reaction the PET chains degraded vigorously with, the formation of acetoxy ethylene end groups of about 25%(molar ratio) of total ethylene content, Both the acetoxy ethylene and acetoxy phenylene end groups were reactive toward the polycondensation reaction. Using PET of low molecular weight or bis-hydroxyethylene terephthalate as the original material, the copolyester of high molecular weight could be prepared, However, it's T-f and HDT were lower, and the solubility was higher than those as PET of high molecular weight was used, These poor properties of copolyester were explained by the high content of ethylene groups and the formation of ether bonds, among which the semi-aromatic ether content is much higher than the aliphatic one, Both the two ether bonds could react with carboxy end groups to propagate the chains under vacuum reaction condition.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:A1996UL64400042&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Chemistry, Multidisciplinary; SCI(E); 中文核心期刊要目总览(PKU); 中国科学引文数据库(CSCD); 0; 5; 824-828; 17
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/402726]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Li, Y,Wang, K,Zhang, GL,et al. Polycondensation reaction of p-acetoxybenzoic acid and poly(ethylene terephthalate) and the formation of ether bonds[J]. 高等学校化学学报,1996.
APA	Li, Y,Wang, K,Zhang, GL,&Zhang, HZ.(1996).Polycondensation reaction of p-acetoxybenzoic acid and poly(ethylene terephthalate) and the formation of ether bonds.高等学校化学学报.
MLA	Li, Y,et al."Polycondensation reaction of p-acetoxybenzoic acid and poly(ethylene terephthalate) and the formation of ether bonds".高等学校化学学报 (1996).