紫外光引发甲基丙烯酸甲酯乳液聚合.pdf

第24卷第1期
化学研究
中国科技核心期刊
2013年1月
CHEMICAL RESEARCH
hxy(@henu.edu.cn
紫外光引发甲基丙烯酸甲酯乳液聚合
张敏娟',张爱珍,张力2
(1.郑州工业贸易学校基础部,河南郑州450007;2.广东工业大学材料与能源学院,广东广州51006)
摘要:以60W高压汞灯为光源,以偶氮二异丁氧(AIBN)为主要光引发剂,以甲基丙烯酸甲(MA)为单体
进行乳液合,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,转化率随光照时问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
关键词:紫外光引发;甲基丙烯酸甲酯;乳液聚合;转化率
中图分类号:O643.3
文献标志码:A
文章编号:1008-1011(2013)01-0079-03
Emulsion polymerization of methylmethacrylate initiated
by ultraviolet irradiation
ZHANG Min-juan, ZHANG Ai-zhen, ZHANG Li
(1. Fundamental Department, Zhengzhou Trade and Industry Schools, Zhengzhou 450007, Henan, China
2. School of Material and Energy Source, Guangdong University of Technology, Guangzhou 510006, Guangdong, China
Abstract: 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 cffects 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%
Keywords: ultraviolet initiation; methylmethacrylate; emulsion polymerization; conversion rate
聚甲基丙烯酸甲酯(PMMA)又称有机玻璃,具有高度透明性,有一定的耐冲击强度与良好的低温性能,
是航空工业与光学仪器制造工业的重要原料.目前合成PMMA多采用本体聚合、乳液聚合等.传统的聚
合方法均采用热引发.紫外光聚合是近年来出现的一种新的无污染和操作方便的聚合方法,可以通过开
启和关闭光源控制反应的进行.反应所需的活化能低,易于进行低温聚合,这就为进一步的研究提供了十分
便利的手段3.本实验采用光引发剂在紫外灯照射下产生自由基引发甲基丙烯酸甲酯进行乳液均聚,探讨
了聚合体系中各种反应条件对聚合反应的影响
1实验部分
1.1实验药品
甲基丙烯酸甲酯(MMA),分析纯;十二烷基硫酸钠(SDS),化学纯;辛基酚聚氧乙烯醚(OP-10),化学
收稿日期:2012-06-21
作者简介:张敏娟(1984一),女,讲师,硕士,主要研究新型聚合物材料