文献类型：期刊文献

英文题名：Novel polyethylene glycol-based polyester-toughened polylactide

作者：Gui, Zongyan[1];Xu, Yuanyuan[1];Gao, Yun[1];Lu, Chong[1];Cheng, Shujun[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2012

卷号：71

起止页码：63

外文期刊名：MATERIALS LETTERS

收录：;EI(收录号：20120414718597);WOS:【SCI-EXPANDED(收录号:WOS:000301034900019)】；

语种：英文

外文关键词：Biomaterials; Polymers; Polylactide; Blend; Toughen

摘要：Polyethylene glycol (PEG) is an excellent plasticizer for polylactide (PLA) and can significantly enhance the elongation at break of PLA. However, the impact resistance of PLA/PEG blend is very limited. In this study. PLA was toughened by blending with a novel PEG-based polyester, poly (polyethylene glycol-co-citric acid) (PEGCA), synthesized by a condensation reaction between PEG and citric acid. PLA and PEGCA were partially miscible. The PEGCA phase was dispersed in the continuous PLA phase. The PLA/PEGCA (85/15 w/w) blend showed much better mechanical properties in comparison to the PLA/PEG (85/15 w/w) blend. With the addition of 15% PEGCA, the elongation at break reached 242%, whereas the impact resistance reached 103 J/m. (C) 2011 Elsevier B.V. All rights reserved.