单分散性聚苯乙烯微球的研究：———稳定剂,反应温度和单体浓度的影响

以乙烯基吡咯烷酮为分散剂，以水和忆醇混合溶液为反应介质，用分散聚合方法制备单分散聚苯乙烯微球。考察了反应温度、稳定剂浓度和单体浓度对微球平均粒径大小和粒径分布的影响。实验结果表明聚乙二醇不适合作苯乙烯分散聚合的稳定剂。随聚乙烯基吡咯烷酮浓度变大，微球粒径变小，粒径分布变窄，单体深度的增大会导致微球粒径的增大及粒径分布的中宽。随聚合温度的提高，微球粒径变大。

STUDY ON MONODISPERSE POLYSTYRENE PARTICLES EFFECT OF STABILIZER,TEMPERATURE AND MONOMER

The monodispersed polystyrene particles were prepared by dispersion polymerization using polyvinylpyrrolidone as a stabilizer and water/alcohol mixture as reaction medium.The effects of reaction temperature,concentration of the initiator and stabilizer on the size and size distribution of PS particles were investigated.The results showed that the properties and concentration of stabilizers both affected the size and size distribution.The size of particles decreased as the polyvinylpyrrolidone concentration rose,but increasing the initiator concentration led to increasing size and broad distribution of particle size.Increasing the reaction temperature may lead to the growth of the particle size.