大分子链转移剂控制下的苯乙烯RAFT细乳液聚合

摘要

以十二烷基硫酸钠为乳化剂,十八烷基甲基丙烯酸酯为助乳化剂,偶氮二异丁腈为引发剂,本体聚合得到的大分子链转移剂控制苯乙烯RAFT细乳液聚合,考察聚合过程中动力学、粒径及温度对其的影响,发现聚合过程符合活性/可控自由基聚合一般规律且乳液较稳定,随反应温度升高反应速度加快.%High molecular weight chain transfer agent was synthesized with lauryl sodium sulfate as a emulsifier, octadecyl methyl acrylates as a costabilizer and azodiisobutyronitrile as a initiator by bulk polymerization and then it was used in the RAFT miniemulsion polymerization of styrene.The effect of kinetics of the RAFT miniemulsion polymerization, particle diameter and the influence of temperature were studied and it followed the rule of the living radical polymerization.The emulsion was stable and the reaction speed was more quickly following the increasing reaction temperature.