二(叔丁基环戊二烯基)钕甲基配合物催化ε-己内酯开环聚合

THE RING OPENING POLYMERIZATION OF ε CAPROLACTONE BY BIS (TERT BUTYLCYCLOPENTADIENYL) METHYL NEODYMIUM COMPLEX

二（叔丁基环戊二烯基）钕甲基配合物催化ε己内酯开环聚合罗云杰姚英明沈琪（苏州大学化学化工学院苏州２１５００６）关键词开环聚合，ε己内酯，茂基稀土甲基配合物聚ε己内酯（Ｐｏｌｙｃａｐｒｏｌａｃｔｏｎｅ，ＰＣＬ）是一种生物降解材料，有良好的相...

Ring opening polymerization of ε caprolactone (Cl) catalyzed by bis(tert butyl cyclopentadienyl) methyl neodymium was studied. The yield was obviously dependent on the catalyst concentration and the polymerization temperature. The molecular distribution of the polymer changed little with the increase of polymerization time. The initiation mechanism of polymerization has been studied through oligomer end group analysis by NMR. The results demonstrate that catalyst reacts first with ε caprolactone to give a lanthanide alkoxide which then catalyzes caprolactone polymerization.