含N,N—二乙基二硫代氨基甲酸基的PVC引发苯乙烯接枝聚合的研究

A Study of the Styrcne Graft Polymerization Initiated by PVC with N,N -diethyldithiocarbamate Group

本文介绍用铜试剂(N,N—二乙基二硫代氨基甲酸钠,简称NaSR)取代PVC中的部分氯原子,得到含有多个SR基团的功能高分子,并用它引发苯乙烯在四氢呋喃中的接枝聚合反应.结果表明,紫外光辐射下的单体转化率随单体浓度、引发剂浓度和聚合时间的增加而增加,聚合反应具有高的接枝率和接枝效率,产物为交联聚合物.对照实验表明,在功能高分子存在下的热聚合或无功能高分子存在下的光聚合,其单体转化率都很低.

Functional PVG (PVC-SR) with N,N - diethyldithiocarbamate group prepared by the substitution of partial chloride in PVC with sodium N could be used to initiate styrene graft polymerization in THF. The results showed that the monomer conver sion increased with the the increase of the monomer amount, PVC-SR amount and polymerization time in UV radiation poly merization , the graft ratio and efficiency were high, and the product was a crosslinking polymer. A contrast experiment showed the monomer conversion was very low in thermal polymerization with PVC-SR and in UV radiation polymerization without PVC-SR.