文献类型：期刊文献

英文题名：Reverse atom transfer radical emulsion polymerization of styrene initiated by BPO or KPS

作者：Gao, N; Zhang, B; Hu, CP; Ying, SK

机构：[1]E China Univ Chem Technol, Lab Living Polymerizat, Shanghai 200237, Peoples R China

年份：2003

期号：5

起止页码：688

外文期刊名：ACTA POLYMERICA SINICA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000186339300016)】；

语种：英文

外文关键词：reverse atom transfer radical polymerization; emulsion polymerization; styrene; initiator

摘要：Reverse atom transfer radical polymerization of styrene initiated by benzoyl peroxide(BPO) or potassium persulfate(KPS) in emulsion systems with phenanthroline as ligand and sodium lauryl sulfate as surfactant was studied. For the BPO initiator system, the good control over the polymerization of styrene was observed when both CuBr and CuBr2 were simultaneously introduced into the reaction system. In this case, the fast initiation could be expected as a result of the quick redox reaction of CuBr and BPO, and the addition of CuBr2 at the beginning of polymerization could further improve the controllability of the polymerization. For the polymerization initiated by KPS, the pH value of the reaction medium played a crucial role in affecting the polymerization rate of St which increased with the increase of the pH value of the medium. The particle size and particle size distribution of the synthesized polystyrene with BPO or KPS were measured, and found to be quite different.