β-丙烯酰氧基丙酸甲氧基乙酯乳液共聚合

Emulsion copolymerization of methoxy ethyl β-acrylopropionate

对 β 丙烯酰氧基丙酸甲氧基乙酯 (自制 )与丙烯酸乙酯、丙烯酸丁酯以及甲基丙烯酸缩水甘油酯的乳液共聚合反应 ,考察了乳化剂的种类及用量对聚合反应的影响 ;不同硫化点单体对其转化率和凝胶含量以及分子量的影响及不同加料方式和反应时间对转化率和凝胶含量的影响。结果表明 ,选择阴离子型与非离子型复合体系作为聚合反应的乳化体系较为适宜 ,且采用氧化 还原体系 (过硫酸铵和亚硫酸氢钠 )较好 ;选择甲基丙烯酸缩水甘油酯可以得到高转化率、低凝胶含量的橡胶 ;采用滴加乳液法时聚合速度容易控制 ;IR。

The emulsion copolymerization of methoxy ethyl β acrylopropionate with ethyl acrylate, butyl acrylate and glycidyl methacrylate was discussed. The effects of emulsifier and initiator on polymerization and of crosslinking monomer on conversion and gel content were studied. Different feeding ways and reaction time had different influnces on polymerization. The results show that the redox initiator, the combination of anionic and non anionic emulsifer and crosslinking monomer glycidyl methacrylate are suit for this system, and the speed of polymerization could be easily controlled by dropping emulsion. DSC and IR show that the copolymer can be used to manufacture cold resistant acrylic rubber further.