文献类型：期刊文献

英文题名：Chain extension and oxidation stabilization of Triphenyl Phosphite (TPP) in PLA

作者：Meng, Xin;Shi, Guotao;Wu, Chushi;Chen, Weijie;Xin, Zhong[1];Shi, Yaoqi;Sheng, Yan

机构：[1]E China Univ Sci & Technol, Shanghai Key Lab Multiphase Mat Chem Engn, Sch Chem Engn, Shanghai 200237, Peoples R China; E China Univ Sci & Technol, Dept Prod Engn, Sch Chem Engn, Shanghai 200237, Peoples R China

年份：2016

卷号：124

起止页码：112

外文期刊名：POLYMER DEGRADATION AND STABILITY

收录：;EI(收录号：20160101768923);WOS:【SCI-EXPANDED(收录号:WOS:000369197600013)】；

基金：The authors are grateful to the financial support of National Natural Science Funds of China (Grant No.21576086 and 21306047) and the Fundamental Research Funds for the central universities (Grant No. 222201313006).

语种：英文

外文关键词：PLA; Chain extension; Phosphite; Oxidation degradation; Activation energy

摘要：PLA, which is synthesized from natural resource, has good mechanical property and biodegradable ability, so it is well recognized as a reasonable substituent of petroleum base plastic. Triphenyl Phosphite can increase the molecular weight of PLA through the chain extension with PLA in the melt processing. In this paper, the factors that influence the chain extension of TPP in PLA were studied in detail. The results show that the adding amount of TPP, processing temperature and processing time affect the chain extension of TPP in PLA. When the adding amount of TPP is about 2wt% compared to PLA, the melt temperature is 180 degrees C and the melt time lasts 15 min, the chain extension is the best. On the conditions, the molecular weight of PLA increases about 56% compared to virgin PLA and can reach 2.52 x 10(5) g/mol. Furthermore, the chain extension makes the activation energy of oxidation degradation of PLA increases by 14.3%, so the chain extended PIA named PLA-TPP indicates the better oxidation stability. (C) 2015 Elsevier Ltd. All rights reserved.