摘要
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。
A kind of self-emulsifiable epoxy resin was synthesized by introducing hydrophilic molecular chain into epoxy resin through the free radical graft polymerization, the E-44 epoxy resin was used as the matrix and 2-acrylanmido-2-methylpropanesulfonic acid （AMPS） was used as the modifier. And with using the yield and water dispersibility of modified epoxy resin as the main index, the effects of amounts of AMPS, N,N＇- dimethylformamide and benzoyl peroxide, the ratio of solvent, reaction temperature and time and system acidity on the graft polymerization were investigated. The structure of modified product and particle size of emulsion was characterized by IR spectrum and laser particle size analyzer. The results indicated that this method could make the epoxy resin obtain water solubility and retain quite a bit of epoxy groups, and the particle size distribution was 0.1-1μm, the yield of product reached 98%, and after 21 months standing at room temperature, the emulsion was still stable.
出处
《化学与粘合》
CAS
2011年第4期26-29,77,共5页
Chemistry and Adhesion
基金
哈尔滨市科技局2010年度科技创新人才基金项目(编号:2010RFJGG031)
