以甲基丙烯酸甲酯(MMA)为单体,过硫酸钾(KPS)为引发剂,采用无皂乳液聚合法制备了聚甲基丙烯酸甲酯(PMMA)微球.采用傅立叶红外光谱(FTIR)、扫描电子显微镜(SEM)对微球的结构组成、表面形貌、粒径及其分布进行了表征.系统地研究了单体、引发剂、铜离子用量及其加入时间对单体转化率、微球的粒径及其分布的影响.结果表明聚合反应初期引入Cu2+会导致PMMA微球粒径分布变宽,粒径大小不均匀.而聚合反应进行2h后加入Cu2+能够得到粒径约为300nm,球形度好,表面光滑,大小均匀的单分散PMMA微球.
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