【摘要】 选用甲基丙烯酸甲酯(MMA)与2-乙基己基丙烯酸酯(2-EHA)构成基体共聚体系，协同γ-甲基丙烯酰氧丙基三甲氧基硅烷(A-174)作为功能改性单体，创新采用活性-非离子复合乳化体系(含反应型乳化剂及环保表面活性剂),通过分步种子乳液聚合工艺构建核壳结构聚合物胶粒。通过TEM、DSC、TGA、FTIR等分析手段对其进行系统表征，重点考察乳液分子结构、热稳定性及微观形貌特征。结果表明，当A-174添加量达总单体质量4‰时，体系综合性能最优。该用量下的丙烯酸酯乳液具有优良的稳定性，单体转化率达到95.13%;挥发性有机化合物(VOC)含量为0 g/L,符合“绿色”产品的要求；与改性前相比，乳胶膜接触角提升14%,铅笔硬度提升至H。综上，A-174改性可以显著提升乳液的耐水性能和硬度。更多还原

【Abstract】 The matrix copolymerization system of methyl methacrylate(MMA) and 2-ethylhexyl acrylate(2-EHA) was selected, and γ-methylacryloxypropyl trimethoxysilane(A-174) was used as the functional modified monomer. The active non-ionic composite emulsion system(containing reactive emulsifiers and environmental surfactants) was innovatively adopted. The core-shell polymer colloidal particles were constructed by step-by-step seed emulsion polymerization. The emulsion was systematically characterized by TEM, DSC, TGA, FTIR and other analytical methods, focusing on the molecular structure, thermal stability and micro-morphology of the emulsion. The results showed that when the additive amount of A-174 reached 4‰ of the total monomer weight, the comprehensive performance of the system was the best. The acrylate emulsion with this dosage had excellent stability, and the monomer conversion reached 95.13%. The VOC content is 0 g/L, which meets the requirements of ‘green’ products. The contact Angle of latex film was increased by 14% compared with that before modification. Pencil hardness increased to H. In conclusion, the modification of A-174 can significantly improve the water resistance and hardness of the emulsion.更多还原