A highly efficient catalyst for the "living" and "immortal" polymerization of ε-caprolactone and L-lactide

被引：202

作者：

Liu, YC ^{[1
]}

Ko, BT ^{[1
]}

Lin, CC ^{[1
]}

机构：

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

来源：

MACROMOLECULES | 2001年 / 34卷 / 18期

关键词：

D O I：

10.1021/ma0104579

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A novel ligand, 2,2'-methylenebis(4,6-di(1-methyl-1-phenylethyl)phenol) (MMPEP-H-2) (1), has been prepared by the reaction of 2,4-bis(alpha,alpha -dimethylbenzyl)phenol with formaldehyde in the presence of a catalytic amount of benzenesulfonic acid. Further reaction of compound I with Me3Al in diethyl ether produces a four-coordinated monomeric aluminum complex [(MMPEP)AlMe(OEt2)] (2). [(MMPEP)-Al(mu -OBn)](2) (3) can then be synthesized from the reaction of 2 with 1 molar equiv of benzyl alcohol at ambient temperature. 3 has demonstrated highly efficient catalytic activities in the ROP of epsilon -caprolactone and the ROP Of L-lactide. The "living" character of complex 3 enable us to prepare PCL-b-PLA copolymer, and the "immortal" character of 3 has paved a way to synthesize as much as 160-fold polymer chains of poly(caprolactone) with very narrow PDI in the presence of a small amount of initiator.

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页码：6196 / 6201

页数：6

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