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单分散聚苯乙烯微球的制备及其影响因素的研究
引用本文:李艺,李效玉.单分散聚苯乙烯微球的制备及其影响因素的研究[J].北京化工大学学报(自然科学版),2004,31(5):53-56.
作者姓名:李艺  李效玉
作者单位:北京化工大学材料科学与工程学院;北京 100029
摘    要:以聚乙烯基吡咯烷酮(PVP)为分散剂,无水乙醇为反应介质,偶氮二异丁腈为引发剂,采用分散聚合方法,制备出球形度良好的单分散聚苯乙烯微球。并讨论了初始单体浓度、引发剂用量、稳定剂用量及加料方式对聚苯乙烯微球粒径及分布的影响。结果表明,在一定反应条件下,随着初始单体浓度和引发剂浓度的增大,聚苯乙烯微球的粒径增大,分布变宽;随着分散稳定剂PVP浓度的增大,微球粒径变大,分布变窄。且一次加料有助于形成单分散的聚苯乙烯微球。

关 键 词:分散聚合  聚苯乙烯微球  单分散  偶氮二异丁腈  稳定剂  分散聚合    聚苯乙烯微球    单分散    偶氮二异丁腈    稳定剂  
收稿时间:2004-03-03
修稿时间:2004年3月3日

Preparation of monodisperse polystyrene microspheres and its influence factors
Li Yi,Li Xiao-yu.Preparation of monodisperse polystyrene microspheres and its influence factors[J].Journal of Beijing University of Chemical Technology,2004,31(5):53-56.
Authors:Li Yi  Li Xiao-yu
Institution:College of Materials Science and Engineering; Beijing University of Chemical Technology; Beijing 100029; China
Abstract:Monodisperse polystyrene microspheres were prepared by dispersion polymerization in ethyl alcohol reaction media using polyvinylpyrrolidone (PVP) as steric stabilizer and 2,2-azobisizobutyronitrile (AIBN) as initiator in a suitable condition. The effects of the initial monomer, stabilizer and initiator concentrations on the size and the size distribution of polymer particles were investigated through condition experiments. The results show that the size of polystyrene microspheres decreases with increase in amount of stabilizer, and an increase in the initiator and initial monomer concentrations will increase the particle size and broaden the size distribution. And the monomer added once in a lump administers is helpful to form the monodisperse polystyrene microspheres.
Keywords:dispersion polymerization  polystyrene microspheres  monodisperse  2  2-azobisizobutyronitrile  steric stabilizer
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