苯并12-冠-4桥联的氮杂环卡宾催化L-丙交酯开环聚合研究

Exploration on Ring-Opening Polymerization of L-Lactide by Benzo-12-crown-4 Bridged N-Heterocyclic Carbene

研究了苯并12-冠-4桥联的氮杂环卡宾(B12C4im Y)催化L-丙交酯的开环聚合,系统地探索了聚合反应的规律,得出了其聚合反应的最优条件.利用1H NMR和IR对聚合物结构进行端基分析,推测出聚合机理是"单体活化"机理.

In this article,ring-opening polymerization of L-lactide catalyzed by benzo-12-crown-4 bridged Nheterocyclic carbene was systematically studied. The polymerization laws were explored and the optimum polymerization condition was obtained. Poly( L-lactide) was characterized by1 H NMR,GPC and IR. Analysis results show that L-lactide polymerization processed through 'monomer-activated'mechanism.