化工进展Issue(2)：539-543,5.DOI:10.16085/j.issn.1000-6613.2016.02.030
端羧基聚乳酸的扩链、改性及其性能
Chain expansion,modification and properties of the carboxyl terminated poly-lactide
摘要
Abstract
The terminal carboxyl group of polylactic acid copolymer P (LA/SA) was synthesized with lactide as raw material,stannous caprylate as the catalyst and succinic anhydride as modifier by direct melt polycondensation,and under the condition of 150℃ and 0.098MPa (LA/SA). The polyesteramide (PEA) was synthesized using 2,2-(1,3-phenylene)-bis(2-oxazoline) (1,3-PBO) chain the terminal carboxyl group of polylactic acid copolymer with then(lactide)/n(1,3-PBO) is 1/2.4 and the reaction time of 12h. Finally,Kaolin and PEA melting compound was modified under stress conditions at 150℃. The structure were characterized by FTIR and the properties were investigated by GPC,FTIR, 1H NMR,DSC,SEM. The result showed that the relative molecular weight of the chain extender product PEA increased significantly compared with P (LA/SA),and the heavy molecular weight was up to 240000. Its glass transition temperature is also higher than that of PLA and P (LA/SA). The thermal stability of the composite material is improved and the crystallinity is reduced after being modified.关键词
聚乳酸/二/唑啉/扩链法/高岭土/复合材料Key words
poly(D,L-lactide)/2,2'-bis( 2-oxazoline)/chain extending/Kaolin/composites分类
化学化工引用本文复制引用
刘钰维,樊国栋,管园园,王丽娜..端羧基聚乳酸的扩链、改性及其性能[J].化工进展,2016,(2):539-543,5.基金项目
陕西省科技厅科技攻关计划（2014K08-12）、陕西省教育厅重点实验室科研项目（14JS015）及陕西科技大学研究生创新基金项目。 （）
