Catalysts for the ring-opening polymerization of ε-caprolactone and L-lactide and the mechanistic study

被引：99

作者：

Yu, TL ^{[1
]}

Wu, CC ^{[1
]}

Chen, CC ^{[1
]}

Huang, BH ^{[1
]}

Wu, JC ^{[1
]}

Lin, CC ^{[1
]}

机构：

[1] Natl Chung Hsing Univ, Dept Chem, Taichung 402, Taiwan

来源：

POLYMER | 2005年 / 46卷 / 16期

关键词：

magnesium; catalyst; L-lactide;

D O I：

10.1016/j.polymer.2005.04.079

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Two novel magnesium aryloxides have been prepared and their catalytic activities toward ring-opening polymerization (ROP) of epsilon-caprolactone and L-lactide have been investigated. The reaction of 2,2'-(2-methoxybenzylidene)-bis(4,6-di(1-methyl-1-phenylethyl)phenol) (MEMPEP-H-2) (1) and 2,2'-methylene-bis(4,6-di(1-methyl-1-phenylethyl)phenol) (MMPEP-H-2) with "Bu2Mg yield dimeric magnesium complexes [Mg(mu-MEMPEP)(THF)](2) (2) and [Mg(mu-MMPEP)(THF)](2) (3), respectively. Catalytic studies of complexes 2 and 3 illustrate that both 2 and 3 are good catalysts in epsilon-caprolactone and L-lactide polymerization. Theoretical study of the ROP mechanism of epsilon-caprolactone catalyzed by 2 demonstrates that the initiator, benzyl alcohol, is activated by the formation of a hydrogen bond with the phenoxy oxygen of MEMPEP2- ligand. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：5909 / 5917

页数：9

共 82 条

[61] Polymerization of lactide and related cyclic esters by discrete metal complexes [J].