USE OF CROWN-ETHER IN THE ANIONIC-POLYMERIZATION OF PROPYLENE-OXIDE .1. RATE OF POLYMERIZATION

被引：43
|
作者：
DING, JF
PRICE, C
BOOTH, C
机构：
[1] UNIV MANCHESTER,MANCHESTER POLYMER CTR,MANCHESTER M13 9PL,LANCS,ENGLAND
[2] UNIV MANCHESTER,DEPT CHEM,MANCHESTER M13 9PL,LANCS,ENGLAND
来源：
EUROPEAN POLYMER JOURNAL | 1991年 / 27卷 / 09期
关键词：
D O I：
10.1016/0014-3057(91)90028-M
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The rate of anionic polymerization of bulk propylene oxide catalysed by potassium alkoxide in the presence of 18-crown-6 ether was followed dilatometrically. Rate constants were obtained at 40, 50 and 60-degrees over a range of crown ether concentrations, so allowing calculation of activation energies for polymerization with and without added crown ether. The results were consistent with polymerization by ligand-separated and contact ion-pairs in equilibrium.
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页码：891 / 894
页数：4
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