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.
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收藏
页码：3775 / 3781
页数：7
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