中文摘要：

在共沉淀法合成超细粉末Fe3O4的基础上,采用分散聚合法,以苯乙烯（St）和甲基丙烯酸（MAA）为共聚单体,以偶氮二异丁腈为引发剂（AIBN）,聚乙烯吡咯烷酮（PVP）为稳定剂,乙醇/水混合溶剂为分散介质,制备了微米级、单分散性较好的P（St/MAA）磁性高分子微球。重点研究了分散介质、加热方式和体系pH值等因素对聚合体系稳定性的影响,并对所制备的磁性微球的外观形态、粒度分布、内部结构和表面羧基含量进行了表征。

英文摘要：

The magnetic oxide （Fe3O4） was prepared by co-precipitation, Using AIBN as the initiator and PVP as the steric stabilizer, magnetic functional polymer microsphere P（St/MAA） was synthesized by the copolymerization of styrene and methacrylic acid in aqueous ethanol medium. The effects of dispersion medium, temperature and pH value on the stabilization of the polymerization system were discussed, Meanwhile external shape, internal structure, size distribution, superficial carboxylic acid content and vsm of the microsphere were characterized.