聚苯乙烯微球表面接枝丙烯腈的研究  

Study on Acrylonitrile Graft Copolymerization on Surfaces of Polystyrene Microspheres

作　　者：张凯[1] 傅强[1] 黄渝鸿[2] 周德惠[2] 

机构地区：[1]四川大学高分子科学与工程学院,成都610065 [2]中国工程物理研究院结构力学研究所,绵阳621900

出　　处：《物理化学学报》2005年第6期673-676,共4页Acta Physico-Chimica Sinica

基　　金：中国工程物理研究院结构力学研究所创新基金(04CXJ-07)资助项目~~

摘　　要：采用分散聚合法制备出平均粒径为3.85μm的窄分布聚苯乙烯微球,并在此基础上引入第二单体丙烯腈进行共聚反应,制备出平均粒径为4.02μm的窄分布苯乙烯-丙烯腈共聚物微球.对聚苯乙烯微球和苯乙烯-丙烯腈共聚物微球进行了形貌及粒径、红外光谱、差示扫描量热法(DSC)分析,结果表明丙烯腈基团均匀分布在聚苯乙烯微球表面,提高了聚苯乙烯微球表面的极性.Functional polymer microspheres with micron size, due to their excellent properties such as small size, narrow size distribution and kinds of functional groups, have gained broad applications in biomedicine, catalyst, bioengineering, separating engineering and information technology. In the present paper, uniform polystyrene (PS) microspheres with average size of 3.85 mu m were prepared by dispersion polymerization. Through adding second monomer acrylonitrile (AN) to initiate dispersion copolymerization, uniform P(St-AN) copolymer microspheres with average size of 4.02 mu m were prepared. These two kinds of polymer microspheres were characterized by morphology and size analysis, FT-IR and DSC. The results showed that acrylonitrile groups were uniformly grafted on the surfaces of polystyrene microspheres and enhanced the polarity of the surfaces. For the P(St-AN) copolymer microspheres, average diameter D=4.02 mu m, standard deviation delta=0.30 mu m, coefficient of variation epsilon=0.075 and glass transition temperature T-g =86.5 degrees C.

关 键 词：聚苯乙烯微球  表面接枝  丙烯腈  分散共聚反应 

分 类 号：TQ316.6[化学工程—高聚物工业]