以芬顿(Fenton)试剂为引发剂分散聚合制备PMMA微球  

Preparation of Monodisperse PMMA Microspheres by Dispersion Polymerization using Fenton Oxidant as Initiator

作　　者：张宏忠[1] 董峰[1] 李丽[1] 康雪晶[1] 王明花[1] 

机构地区：[1]郑州轻工业学院河南省表界面科学重点实验室,郑州河南450002

出　　处：《塑料》2011年第5期57-60,共4页Plastics

基　　金：国家自然科学基金(20971113);河南省国际科技合作项目(084300510089)

摘　　要：采用分散聚合法以甲基丙烯酸甲酯(MMA)为单体,水/乙醇(H_2O/EtOH)作为分散介质,聚乙烯吡咯烷酮(PVP)为分散稳定剂,芬顿试剂硫酸亚铁(FeSO_4)和双氧水(H_2O_2,30%)在pH=3～4的弱酸性条件下作为引发剂,制备了粒径约为408 nm的单分散聚甲基丙烯酸甲酯(PMMA)微球。探讨反应机理及分散介质的配比、单体浓度、分散稳定剂用量、聚合反应时间等对PMMA微球粒径和分散性的影响。该工艺选用新型引发剂,无需除氧,聚合时间短,操作简单,和传统工艺相比具有明显的优势。Monodisperse PMMA microspheres were prepared by dispersion polymerization with methyl methacrylate （MMA） as monomer,water-ethanol as solvent,polyvinylpyrrolidone （PVP） as dispersing agent, and Fenton Oxidant （ FeSO4/ H2O2 ） as initiator at the condition of pH = 3 -4, respectively. It was shown that the average size of PMMA microspheres was 408nm under the experimental parameters. The influence of the ratio of water/ethanol, the concentration of monomer and initiator,the time of reaction on both of the particle diameter and the dispersivity of PMMA microspheres were investigated. Comparing with traditional technology, the technique described above had some advantages such as no deoxygenation, simple and quick polymerization process due to using a new type initiator which had not been reported.

关 键 词：PMMA微球 纳米 分散聚合 芬顿氧化 新型引发剂 

分 类 号：TQ325.7[化学工程—合成树脂塑料工业]