MECHANISM FOR THE INITIATION OF ACRYLONITRILE POLYMERIZATION BY POLYPROPYLENE-BASED POLYAMIDOXIME-THIOUREA COMBINATION

被引：0

作者：

吴锦远

张广照

杨超雄

机构：

[1] Academia Sinica

[2] Guangzhou

[3] Guangzhou Institute of Chemistry

来源：

Chinese Journal of Polymer Science | 1992年 / 01期

基金：

中国国家自然科学基金;

关键词：

Acrylonitrile; Polymerization kinetics; Polyamidoxime-thiourea combination; Coordination-proton transfer mechanism;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Polymerization of acrylonitrile （AN） in aqueous nitric acid initiated by polypropylene-based polyamidoxime （PPAO）-thiourea （TU） combination has been investigated. The overall rate of polymerization （R;） under the conditions of [TU]/[PPAO]<0.5 molar ratio isThe molecular weights of the polymers were found to be inversely proportional to 3/2-power of nitric acid concentration and 1-power of thiourea concentration. In addition, it is independent with the concentrations of monomer and PPAO, and decreases with increasing temperature.On the basis of these experimental results, a coordination-proton transfer mechanism for the initiation was proposed and discussed.

引用

页码：61 / 69

页数：9