摘要:
以聚乙烯吡咯烷酮为分散剂，水及无水乙醇为反应介质，偶氮二异丁腈引发剂，采用分散聚合的方法，制备出了一系列亚微米级的PS微球，分析了单体、引发剂、分散剂的用量，反应介质组成和搅拌速度对产物粒径及粒径分布的影响。结果表明，利用分散聚合，初步实现了PS粒径的可控，反应物组成对微球粒径及分布起主要作用，而搅拌速率只对微球粒径有影响，对粒径分布影响不大。
Abstract: Polystyrene microspheres sized in sub micron were prepared by a dispersion polymerization with PVP as dispersant, H2O and ethanol as reaction medium, AIBN as initiator. The effects of H2O-ethanol ratio, string speed and amount of styrene, AIBN and PVP on particle size and distribution were discussed. Results show that PS spheres size could be preliminarily control. The component of reactant is the main effect of size and distribution, meanwhile, spin rate only effects sphere size.