INFLUENCE OF POOR SOLVENTS IN RADICAL POLYMERIZATIONS OF METHYL-METHACRYLATE

被引：2

作者：

YAMAMOTO, T ^{[1
]}

SEKI, S ^{[1
]}

YAMAMOTO, T ^{[1
]}

HIROTA, M ^{[1
]}

KAMACHI, M ^{[1
]}

机构：

[1] OSAKA UNIV,FAC SCI,TOYONAKA,OSAKA 560,JAPAN

来源：

POLYMER JOURNAL | 1989年 / 21卷 / 06期

关键词：

Acrylic Monomers--Polymerization - Chemical Reactions--Reaction Kinetics - Solvents;

D O I：

10.1295/polymj.21.483

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Radical polymerizations of methyl methacrylate (MMA) were carried out in the presence of poor solvents for poly(methyl methacrylate) (PMMA) at 60°C. At 40 vol% or above of n-hexane and at 50 vol% of cyclohexane, the solutions became turbid during polymerization and the polymers precipitated. But the precipitates were not observed in methanol. The kinetic order of the initiator was 0.5 when no precipitate was observed, but it became less than 0.5 when the precipitate was present. It is concluded that when a precipitate is observed, the propagating radical grows large enough to precipitate by itself and the termination rate decreases.

引用

页码：483 / 487

页数：5

共 13 条

[1]

BAMFORD CH, 1967, MAKROMOLEKUL CHEM, V105, P122

[2]

BAMFORD CH, 1966, MAKROMOL CHEM, V96, P221

[3]

BARTON J, 1980, MAKROMOL CHEM, V181, P1289

[4] RADICAL POLYMERIZATION IN HALOGENATED SOLVENTS .1. METHYL METHACRYLATE POLYMERIZATION INITIATED BY AZOISOBUTYRONITRILE [J].