PREPARATION AND PROPERTIES OF STAT-COPOLY-(OXYETHYLENE OXYPROPYLENE)-BLOCK-POLY(OXYETHYLENE) .1. USE OF CROWN-ETHER IN THE ANIONIC COPOLYMERIZATION OF PROPYLENE-OXIDE AND ETHYLENE-OXIDE

被引：18

作者：

DENG, YL ^{[1
]}

DING, JF ^{[1
]}

YU, G ^{[1
]}

MOBBS, RH ^{[1
]}

HEATLEY, F ^{[1
]}

PRICE, C ^{[1
]}

BOOTH, C ^{[1
]}

机构：

[1] UNIV MANCHESTER,MANCHESTER POLYMER CTR,DEPT CHEM,MANCHESTER M13 9PL,LANCS,ENGLAND

来源：

POLYMER | 1992年 / 33卷 / 09期

关键词：

DIBLOCK COPOLYMERS; ANIONIC POLYMERIZATION; CHARACTERIZATION; CROWN ETHER; REACTIVITY RATIO; STATISTICAL COPOLYMERS;

D O I：

10.1016/0032-3861(92)90500-V

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Stat-copoly(oxyethylene-oxypropylene)s were prepared by anionic polymerization initiated by potassium methoxypropanol in the presence of 18-crown-6-ether, and were characterized by g.p.c. and n.m.r. Molecular weight distributions were narrow. Reactivity ratios, determined from composition and from sequence distribution, were r(E) = 3.1 - 3.3 and r(P) = 0.31 - 0.33, in good agreement with reactivity ratios determined for polymerization without added crown ether. Diblock copolymers with one stat-copoly(oxyethylene-oxypropylene) block and one poly(oxyethylene) block were prepared by sequential polymerization, and were characterized by g.p.c. and n.m.r.

引用

页码：1959 / 1962

页数：4

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