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选用E-44型环氧树脂为母体,2-丙烯酰胺基-2-甲基丙磺酸(AMPS)为改性剂,以自由基接枝聚合反应在环氧树脂分子中引入亲水性的分子链段为技术路线,制得了具有自乳化功能的环氧树脂体系;并以改性环氧树脂的收率和水分散性为主要指标,考察了AMPS、N,N′-二甲基甲酰胺和过氧化苯甲酰的用量、溶剂配比、反应温度、时间及体系酸度等因素对接枝聚合反应得影响,再利用红外光谱和激光粒度分析仪对改性产物的结构和乳液粒径进行了表征。结果表明,该实验方法可以使环氧树脂得到水溶性的同时保留相当数量的环氧基,且乳液粒径分布在0.1～1μm,产物收率达到98%以上,乳液室温静置21个月依然稳定如初。
E-44 epoxy resin was chosen as the matrix and 2-acrylamido-2-methylpropanesulfonic acid (AMPS) as modifier. The free radical graft polymerization was used to introduce hydrophilic Molecular chain segment for the technical route, prepared with the self-emulsifying epoxy resin system; and the modified epoxy resin yield and water dispersibility as the main indicators investigated the AMPS, N, N-dimethyl A The amount of amide and benzoyl peroxide, solvent ratio, reaction temperature, time and the system acidity and other factors on the graft polymerization were affected, and then the use of infrared spectroscopy and laser particle size analyzer on the structure of the modified product and emulsion particle size Characterized. The results show that the experimental method can make the epoxy resin water-soluble while retaining a considerable amount of epoxy groups, and the emulsion particle size distribution in the 0.1 ~ 1μm, the product yield reached 98% or more, the emulsion was allowed to stand still at room temperature for 21 months Steady as ever.