聚乳酸立构嵌段共聚物的合成与表征  

SYNTHESIS AND CHARACTERIZATION OF STEREOBLOCK POLY(LACTIC ACID)S

作　　者：东为富 殷宏军 施冬健 陈明清 张珣 

机构地区：[1]江南大学化学与材料工程学院,无锡214122

出　　处：《工程塑料应用》2011年第11期17-19,共3页Engineering Plastics Application

基　　金：国家自然科学基金项目(51003042);中央高校自主科研项目(JUSRP10906)

摘　　要：以左旋和右旋丙交酯为原料,通过开环聚合制备了含有左旋和右旋乳酸链段的聚乳酸立构嵌段共聚物。采用红外光谱对其分子结构进行表征,表明共聚物已成功合成;并采用差示扫描量热仪和X射线衍射仪对共聚物的熔点和晶型进行研究,表明所得嵌段共聚物具有立构复合结构;采用乌氏粘度计对共聚物的分子量进行研究,表明共聚物的粘均分子量为25600。Stereoblock poly （ lactic acid ） s were successfully synthesized by ring-opening polymerization of D-LA and L-LA.The chemical structure of polyester was characterized by using FTIR.Glass transition temperature and crystallization were measured by using DSC and XRD, which indicated that the poly （ lactic acid ） s exhibited the sterecomplex behaviors.The molecule weight measure by Ubbelohde viscometer was 25600.

关 键 词：聚乳酸 立构嵌段共聚物 结晶 

分 类 号：TQ326.9[化学工程—合成树脂塑料工业]