负离子聚合物微球的制备研究

Research on preparation of the anionic polymer microspheres

首先采用不同的偶联剂对超细负离子粉进行表面改性,再分散到由甲基丙烯酸甲酯(MMA)、热塑性聚氨酯(PU)以及过氧化苯甲酰(BPO)组成的混合物中,以聚乙烯醇(PVA)为分散剂,采用悬浮聚合的方法合成包含有负离子粉的聚合物微球。结果表明,2.5%的硅烷偶联剂有较好的表面处理效果;聚合物微球的粒径越大能够包含的负离子粉越多;随聚氨酯添加量的增加,微球中负离子粉的平均含量及负离子粉的有效利用率均大幅上升。

Firstly the surface of superfine negative ion powder is modified by different coupling agents, and dispersed into a mixture consisting of the methyl methacrylate （MMA）, the thermoplastic polyurethane （PU）, and the benzoyl peroxide （BPO）. The anionic polymer microspheres is synthesized hy the mixture with polyvinyl alcohol （PVA） as a dispersing agents, using suspension polymerization method. The results show that： 2.5% of silane coupling agents has a better effect of surface treatment; the larger particle size of the polymer microspheres contain more negative ion powder; with the increase of the polyurethane, the average amount of negative ion powder in the microspheres and the effective utilization of the negative ion powder increased significantly