Novel polyethylene glycol-based polyester-toughened polylactide

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• 作者：Zongyan Gui ; Yuanyuan Xu ; Yun Gao ; Chong Lu ; Shujun Cheng ; ^{chshj2003@hotmail.com}
• 关键词：Biomaterials ; Polymers ; Polylactide ; Blend ; Toughen
• 刊名：Materials Letters
• 出版年：2012
• 出版时间：15 March 2012
• 年：2012
• 卷：71
• 期：Complete
• 页码：63-65
• 全文大小：599 K

文摘

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.