Lanthanum heterocyclic Schiff-base complex initiated ring-opening polymerization of ε-caprolactone  

作　　者：Wen Lin Wei Lin Sun Zhi Quan Shen Department of Polymer Science and Engineering,Zhejiang University,Hangzhou 310027,China 

出　　处：《Chinese Chemical Letters》2007年第9期1133-1136,共4页中国化学快报（英文版）

摘　　要：Lanthanum complex supported by the heterocyclic Schiff-base ligand of N-(2-pyridyl)-3,5-di-tert-butyl-salicylaldimine was prepared and employed for the ring-opening polymerization(ROP)ofε-caprolactone(ε-CL).The polymers obtained with this initiator showed a unimodal molecular weight distribution implied that only one active species was present.Mechanism study revealed that the polymerization proceeds via acyl-oxygen bond cleavage.Lanthanum complex supported by the heterocyclic Schiff-base ligand of N-(2-pyridyl)-3,5-di-tert-butyl-salicylaldimine was prepared and employed for the ring-opening polymerization(ROP)ofε-caprolactone(ε-CL).The polymers obtained with this initiator showed a unimodal molecular weight distribution implied that only one active species was present.Mechanism study revealed that the polymerization proceeds via acyl-oxygen bond cleavage.

关 键 词：Heterocyclic Schiff-base Rare earth complex Ε-CAPROLACTONE Ring-opening polymerization 

分 类 号：TQ316.341[化学工程—高聚物工业]