Living ring-opening polymerization of lactides catalyzed by guanidinium acetate

被引：21

作者：

Li, H ^{[1
]}

Wang, CH ^{[1
]}

Yue, J ^{[1
]}

Zhao, XN ^{[1
]}

Bai, F ^{[1
]}

机构：

[1] Nankai Univ, Inst Polymer Chem, State Key Lab Funct Polymer Adsorpt & Separat, Tianjin 300071, Peoples R China

来源：

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY | 2004年 / 42卷 / 15期

关键词：

hexabutyl guanidinium acetate; lactide; ring-opening polymerization; living polymerization; biodegradable polymers;

D O I：

10.1002/pola.20275

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Hexabutyl guanidinium acetate (HBG . OAc) was synthesized and successfully used as a catalyst for the ring-opening polymerization (ROP) of lactides. The experimental results indicated that the guanidinium salt HBG . OAc showed satisfactory catalytic behavior. Polymerization in bulk (120 degreesC, 18 h) produced polylactides with moderate molecular weights (number-average molecular weight = 2.0 X 10(4)) and very narrow molecular weight distributions (polydispersity index = 1.07-1.12). A kinetic study of polymerization in bulk with HBG . OAc as an initiator revealed that the polymerization possessed typical characteristics of living polymerization. A ROP mechanism by HBG . OAc was proposed on the basis of the additive effect of the polymerization and the H-1 NMR characterization of the microstructure of the product polymers. (C) 2004 Wiley Periodicals, Inc.

引用

页码：3775 / 3781

页数：7

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