摘要
以过硫酸钾(KPS)为引发剂,以水为反应介质,采用无皂乳液聚合工艺,制备出粒径在500nm左右单分散(分散系数<5%)聚苯乙烯微球。所制备的聚苯乙烯微球为光滑的球形颗粒。研究发现:由无皂乳液聚合法制备的胶体颗粒其ζ电势在不同的离子强度下随pH的变化曲线均出现平台pH6～10.5,说明在一定的离子强度和pH条件下,聚苯乙烯胶乳的ζ电势具有良好的稳定性。聚苯乙烯胶乳有望作为具有一定电势值的标准颗粒。
The water systems have been exploited as dispersion medium in soap-free polymerization of polystyrene （P S） using potassium persulfate as an initiator. The size of particles is round 500nm（coefficient of variation 〈 5 % ）. The study on the curves of Zeta-potential （4） versus pH in different ionic strength showed that the polystyrene colloidal particles prepared by soap-free emulsion polymerization are rather stable their ξ-potential were invariable with the pH varied from 6 to 10.5, so the PS microspheres could be used as a particle model for its ξ-potential value.
出处
《化学通报》
CAS
CSCD
北大核心
2007年第8期641-644,共4页
Chemistry
关键词
聚苯乙烯
无皂乳液聚合
界面电性质
ζ电势
Polystyrene, Soap-free emulsion polymerization, Interface electricity property, ξ- potential
