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.
出处
《工程塑料应用》
CAS
CSCD
北大核心
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)
关键词
聚乳酸
立构嵌段共聚物
结晶
poly （ lactic acid ）, stereoblock polymer, crystallization
