以苯乙烯（St）为单体,甲基丙烯酸（MAA）为功能单体,采用无皂乳液聚合方法制备了聚（苯乙烯-甲基丙烯酸）共聚微球。运用傅立叶红外光谱（FT-IR）、透射电子显微镜（TEM）、场发射扫描电镜（FE-SEM）、电势与纳米粒径分析仪等手段,对微球的组成成分、表面形貌、粒径及其分布、表面电势进行了表征。结果表明,微球粒径均匀,在100～200nm之间,球形度良好且呈单分散性,poly（St-MAA）共聚微球zeta电势为-37.2mV,MAA的亲水性基团和引发剂KPS的残基共同作用提高了共聚微球乳液的稳定性。
Poly（St-MAA） copolymer microspheres were successfully prepared through emulsifier-free emulsion poly-merization,employing styrene and methyl acrylic acid as monomers.The microsphere composition,surface morphology,surface potential,particle size and its distribution were characterized by FT-IR spectroscopy,transmission electron micros-copy,field emission scanning electron microscopy,potential and nano particle size analyzer.The results showed that the microspheres prepared by the method were uniform and monodisperse.The monodispersed microspheres with the size from 100 to 200nm were obtained.Poly（St-MAA） copolymer microspheres zeta potential is -37.2mV,MAA hydrophilic groups and initiator KPS residue interaction improve copolymerization microsphere emulsion stability.
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