新型乳化体系下纯丙聚合物乳液的制备及性能研究

Preparation and properties of pure acrylic polymer latex using novel emulsifying system

采用半连续乳液聚合法,以甲基丙烯酸甲酯(MMA),丙烯酸正丁酯(BA)为主单体,衣康酸单丁酯(MBI)为功能性单体,偶氮二异丁脒盐酸盐(V-50)为引发剂,两性表面活性剂十四烷基二甲基羟丙基甜菜碱与烷基酚聚氧乙烯醚(OP-10)复配作为乳化剂,合成了丙烯酸酯乳液。分别探讨了乳化剂,V-50和MBI的用量对乳液及乳胶膜性能的影响。结果表明当乳化剂的用量占单体质量的7%,V-50为0.5%,MBI为4%时,乳液的综合性能最佳。

The acrylic polymer latex was successfully prepared via semi-continuous seeded emulsion polymerization, using methyl methacrylat （MMA） and butyl acrylate （BA）as the monomers monobutyl itaconate （MBI） as the functional monomer, mixture of tetradecyl dimethyl hydroxy propyl betaine and octylphenol polyoxyethylene ether（OP-10） as the emulsifier and 2,2＇-azobis （2-methyl propion-amidine） dihydrochloride （V-50） as the initiator. The effects of the amounts of the emulsifiers, V-50 and MBI on the properties of the latex and its film were investigated. The results showed that the optimum conditions for preparing the latex were as follows： the amounts of emulsifier, V-50 and MBI were 7%, 0.5% and 4%, respectively.