N-Heterocyclic Carbenes for the Organocatalytic Ring-Opening Polymerization of ε-Caprolactone

被引：143
|
作者：
Kamber, Nahrain E. [1 ]
Jeong, Wonhee [1 ]
Gonzalez, Silvia [1 ]
Hedrick, James L. [1 ]
Waymouth, Robert M. [1 ]
机构：
[1] Stanford Univ, Dept Chem, Stanford, CA 94305 USA
来源：
MACROMOLECULES | 2009年 / 42卷 / 05期
关键词：
LIVING POLYMERIZATION; CYCLIC ESTERS; ORGANIC CATALYSTS; TRANSESTERIFICATION/ACYLATION REACTIONS; ANIONIC-POLYMERIZATION; POLY(ETHYLENE GLYCOL); LACTIDE; LACTONES; POLYESTERS; COMPLEXES;
D O I：
10.1021/ma802618h
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
We report the synthesis of poly(epsilon-caprolactone) utilizing N-heterocyclic carbene (NHC) organocatalysts. Sterically unencumbered NHCs were found to be highly effective for the living ring-opening polymerization of E-caprolactone under mild conditions. The NHCs were able to produce poly (epsilon-caprolactone)s with controlled molecular weights, low polydispersities, and well-defined end groups derived from the alcohol initiator. Star-shaped poly(epsilon-caprolactone)s with three and four arms were prepared using NHC organocatalysts and characterized. by H-1 NMR and GPC.
引用
收藏
页码：1634 / 1639
页数：6
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