Ring-opening polymerization of D,L-lactide with bis(trimethyl triazacyclohexane) praseodymium triflate

被引：23
|
作者：
Köhn, RD [1 ]
Pan, ZD
Sun, JQ
Liang, CF
机构：
[1] Univ Bath, Dept Chem, Bath BA2 7AY, Avon, England
[2] Zhejiang Univ, Coll Mat Sci & Chem Engn, Hangzhou 310027, Peoples R China
来源：
CATALYSIS COMMUNICATIONS | 2003年 / 4卷 / 01期
关键词：
ring-opening polymerization; polylactide; praseodymium; lanthanide triflates; Lewis acid catalyst;
D O I：
10.1016/S1566-7367(02)00244-3
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Ring-opening polymerization Of D,L-lactide (LA) was catalyzed by the well-defined bis(trimethyl triazacyclohexane) praseodymium, triflate [(Me(3)TAC)(2)Pr(OTf)(3)] (Cat) for the first time. The effect of the [LA]/[Cat] molar ratio, solvents, temperature, and reaction time were investigated in detail. The results show that the praseodymium catalyst is very efficient in the melt polymerization, giving D,L-PLA with molecular weights of 10(4) in good conversion. The importance of the triazacyclohexane was shown by comparison to the poor catalytic activity of Pr(OTf)(3). (C) 2002 Elsevier Science B.V. All rights reserved.
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收藏
页码：33 / 37
页数：5
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