摘要
采用苯乙烯(St)为反应单体,偶氮二异丁腈(AIBN)为引发剂,聚乙烯基吡咯烷酮(PVP)为分散荆,无水乙醇和去离子水为分散介质,通过改变反应物质的浓度,制备出平均粒径为1.17、1.66、2.04、2.26、2.90和3.04μm,单分散性好的聚苯乙烯微球。并对其生长机理进行了深入探索,建立了生长模型,考察了引发剂半衰期在微球生长过程的影响,并证明了分散剂在微球表面是一种物理吸附作用。
Highly monodispersed polystyrene mierospheres were synthesized via dispersion polymerization using styrene as monomer,AIBN as initiator, PVP as stabilizer and ethanol and de-ionized water as solvent. Various polystyrene microspheres with the average diameters of 1.17,1.66,2.04,2.26,2.9 and 3.04μm were obtained. The growth mechanism was investigated and the growth model was established. It was found that the half life of the initiator was the key factor in the process of the polymerization. The PVP was proved to be physically adsorbed on the surface of the polystyrene mierosphere.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2008年第8期1402-1405,1409,共5页
Journal of Functional Materials
基金
国家自然科学基金(50672003)
教育部新世纪优秀人才计划资助项目(NCET-06-0179)
关键词
聚苯乙烯徽球
分散聚合法
生长机理
polystyrene microsphere
dispersion polymerization
growth mechanism
