摘要
在乙醇水混合溶剂中,用过硫酸钾(KPS)作为引发剂,通过乳液聚合作用来合成直径为375nm的聚苯乙烯(PSt)微球,并作为种子用于种子乳液聚合。用PEGm大分子单体作为稳定剂、偶氮二异丁腈作为引发剂,采用种子乳液聚合法,聚合苯乙烯和丙烯腈,制得特殊形态的亚微米尺寸的PEGm接枝共聚复合颗粒PEGm g PSAN。扫描电子显微镜(SEM)显示苯乙烯和丙烯腈同时促成了特殊形态。苯乙烯和丙烯腈的浓度、总单体浓度、引发剂类型和单体加入方式显著影响复合聚合物颗粒的形态。
Polystyrene （PSt）microspheres with diameter of 375 nm to be used as the seeds for see- ded emulsion polymerization were prepared via emulsion polymerization using potassium persulfate （KPS） as initiator in ethanol-water mixed solvents. Emulsifier-free seeded emulsion copolymerization of styrene （St）with acrylonitrile （AN）was carried out in the presence of poly（ethylene glycol）monome- thoxymonomethacrylate （PEGm）macromonomer as reactive stabilizer and 2,2＇-azobisisobutyronitrile （AIBN）as initiator to obtain submicron-sized PEGm graft poly（styrene-co-acrylonitrile）（PEGm-g- PSAN） composite particles with unique morphology. Scanning electron microscopy （SEM）indicated that St and AN together contributed to forming the unusual morphology. The concentration of St and AN, total monomer concentration,initiator type and the monomer adding method remarkably affected the morphology of the composite polymer particles.
出处
《弹性体》
CAS
2012年第3期43-48,共6页
China Elastomerics
基金
国家自然科学基金资助项目(50443012
20671043)
关键词
种子
复合颗粒
种子乳液聚合
形态
seed
composite particle
emulsifier-free emulsion copolymerization
morphology
