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以丙烯酸为原料 ,通过亲核加成反应合成了 β 丙烯酰氧基丙酸 ,然后再与乙二醇单甲醚反应 ,得到 β 丙烯酰氧基丙酸甲氧基乙酯。讨论了不同影响因素如阻聚剂、脱水剂和反应时间对合成反应以及转化率的影响 ;分别用红外光谱法、气相色谱 质谱联用法表征了产物 ,同时用液相色谱分析了产物的含量 ;采用乳液聚合法合成了该单体的聚合物 ,并用DSC测定了聚合物的玻璃化转变温度。结果表明 ,选择阻聚剂对苯二酚、脱水剂苯有利于合成反应 ,体系转化率高 ;所合成单体均聚物的玻璃化转变温度为 - 5 4℃
Acrylic acid was used as the starting material to synthesize β-acryloyloxypropionic acid through nucleophilic addition reaction, and then reacted with ethylene glycol monomethyl ether to obtain β-acryloyloxy propionic acid methoxyethyl ester. The effects of different influencing factors such as polymerization inhibitor, dehydrating agent and reaction time on the synthesis reaction and the conversion were discussed. The products were characterized by IR and GC-MS, respectively. Meanwhile, the content of the product was analyzed by liquid chromatography. The monomer of the polymer was synthesized by emulsion polymerization. The glass transition temperature of the polymer was determined by DSC. The results show that hydroquinone and dehydrating agent benzene are selective polymerization inhibitors, and the conversion rate of the system is high. The glass transition temperature of the synthesized homopolymer is -54 ℃