文献类型：期刊文献

英文题名：The effect of metal catalyst on the discoloration of poly(ethylene terephthalate) in thermo-oxidative degradation

作者：Yang, Jinghui[1];Xia, Zhenxin[1];Kong, Fantao[1];Ma, Xinsheng[1]

机构：[1]E China Univ Sci & Technol, Natl Engn Res Ctr Ultrafine Powder, Shanghai 200237, Peoples R China

年份：2010

卷号：95

期号：1

起止页码：53

外文期刊名：POLYMER DEGRADATION AND STABILITY

收录：;EI(收录号：20095012539675);WOS:【SCI-EXPANDED(收录号:WOS:000273870500007)】；

基金：The authors are grateful to the financially support by the National Natural Science Foundation of China (Grant No. 20704012) and Shanghai Rising-Star Program (Grant No. 08QH14010).

语种：英文

外文关键词：Polyethylene terephthalate; Thermo-oxidative degradation; Titanium-based catalyst; Discoloration; Quinonoid structure

摘要：Titanium-based catalyst and ethylene glycol antimony were used as catalysts to prepare poly(ethylene terephthalate) (PET), and the effect of the catalysts on the discoloration of PET in thermo-oxidative degradation was studied by UV-visible spectroscopy, Fourier transform infrared spectroscopy (FTIR) and fluorescence spectroscopy. Hydroxylation was found during thermo-oxidative degradation of both the titanium- and antinomy-containing PETs. However, more hydroxylated products were further changed into quinonoid species in the presence of titanium catalyst, which directly results in obviously enhanced coloration of the PET. It indicates that the PET synthesized with titanium-based catalysts is more susceptible to formation of quinonoid groups and discoloration than the PET prepared with ethylene glycol antimony. (C) 2009 Elsevier Ltd. All rights reserved.