摘要
以60W高压汞灯为光源,以偶氮二异丁氰(AIBN)为主要光引发剂,以甲基丙烯酸甲酯(MMA)为单体进行乳液聚合,考察了光照时间、单体浓度、光引发剂浓度等因素对单体转化率的影响;采用透射电镜观察了乳胶粒的形态,并测定了其尺寸.结果表明,转化率随光照时间和单体浓度的增加而上升;当光引发剂质量分数为3%时单体转化率最高.
A 60 W high pressure mercury lamp was used as the light source to initiate the emul- sion polymerization of methylmethacrylate （MMA） monomer in the presence of azodiisobuty- ronitrile as the major photoinitiator. The effects of irradiation time, concentration of mono- mer, and concentration of photointiator on the conversion rate of MMA monomer were investi- gated. A transmission electron microscope was performed to observe the morphology of as-ob- tained emulsion and determine the size of the emulsion particles as well. Results show that the conversion rate rises with the increase of irradiation time and monomer concentration as well. The highest conversion rate is obtained at a photoinitiator concentration of 3% （mass frac- tion）, and the conversion rates tends to decline with further increase of the photoinitiator con- centration above 3 %.
出处
《化学研究》
CAS
2013年第1期79-81,共3页
Chemical Research
关键词
紫外光引发
甲基丙烯酸甲酯
乳液聚合
转化率
ultraviolet initiation methylmethacrylate emulsion polymerization conversion rate
