L-丙交酯和D,L-丙交酯混合制备PLA工艺探讨  

Synthesis process of poly(lactic acid) by blending of L-lactide and D,L-lactide

作　　者：魏顺安[1] 尤新强[1] 吕利平[1] 杨楠[1] 罗鹏[1] 

机构地区：[1]重庆大学化学化工学院,重庆400044

出　　处：《化工新型材料》2012年第5期45-47,共3页New Chemical Materials

基　　金：中央高校基本科研业务费(CDJZR10220010)资助项目

摘　　要：以辛酸亚锡为催化剂,采用开环聚合法,对L-丙交酯和D,L-丙交酯混合制备PLA工艺进行探讨,分别考察了D,L-丙交酯含量、催化剂用量、聚合时间、聚合温度和体系真空度对PLA粘均分子量的影响。经过GPC测试,所得PLA的质均分子量达到1.15×105,并采用红外光谱仪和差热-热重分析仪对PLA进行了结构和热性能表征。The synthesis process of PLA which was prepared by blending of L-lactide and D, L-lactide was studied. The effects of content of D, L lactide, catalyst dosage, polymerization temperature, polymerization time and vacuum degree on the viscosity average molecular weight （Mv） of PLA were investigated, respectively. The weight average molecular weight（Mw） of PLA reached 1.15）〈 10S by GPC. And the molecular structure and thermal property of PLA was character- ized by infrared spectrometer and differential thermal-thermal gravitation analysis.

关 键 词：丙交酯 聚乳酸 合成工艺 

分 类 号：TQ316.33[化学工程—高聚物工业]