超声辐照引发MMA微乳液聚合

Ultrasonic Induced Microemulsion Polymerization of MMA

研究了超声波引发甲基丙烯酸甲酯 ( MMA)的微乳液聚合 .辐照 4 0 min时单体转化率高达 90 % .透射电镜观察发现 ,PMMA微乳液平均粒径为 36.5 nm,粒径分布窄 ,表明超声波引发是制备 PMMA微乳液的有效方法 .采用分光光度计对微乳液聚合过程中乳胶粒的形成和大小进行了间接表征 ,研究了超声功率输出、乳化剂、助乳化剂、单体和引发剂对

In this work, ultrasonic induced microemulsion polymerization of MMA was successfully performed and the monomer conversion reached about 90% in 40 min. TEM observation showed that the average diameter of PMMA latex was 36 5 nm with a narrow distribution. Several influencing factors such as power output, surfactant, co emulsifier, monomer and chemical initiator were investigated detailedly from the view of formation of microemulsion and the growth of latex by spectraphotometry.