D_4~(Vi)-丙烯酸酯共聚乳液的制备与表征

以四甲基四乙烯基环四硅氧烷(D4Vi)、甲基丙烯酸甲酯(MMA)、丙烯酸丁酯(BA)和丙烯酸(AA)为原料,采用一次性投料法制得了有机硅-丙烯酸酯共聚乳液。探讨了反应温度、催化剂种类及用量对D4Vi转化率的影响。采用傅里叶红外光谱仪、透射电子显微镜、原子力显微镜对乳液结构及状态进行了表征。结果表明,以DV4i、MMA、AA、BA为主要原料,聚合反应温度为80℃,盐酸为催化剂且最佳用量为D4Vi质量的1.8%,可以制得涂膜表面光滑,没有明显相分离的有机硅-丙烯酸酯乳液。

Synthesis and characterization of a 2,4,6,8-tetravinyl-2,4,6,8-tetramethylcyclotetrasiloxane (DVi4)-acrylate copolymeric latex

A 2,4,6,8-tetravinyl-2,4,6,8-tetramethylcyclotetrasiloxane (D₄^Vi)-acrylate polymer latex has been prepared by the method of one-stage addition using 2,4,6,8-tetravinyl-2,4,6,8-tetramethylcyclotetrasiloxane (D₄^Vi), methyl methacrylate (MMA), butyl acrylate (BA) and acrylic acid (AA) as precursors. The effects of different types of catalyst, catalyst amount and reaction temperature on the extent of conversion of D₄^Viwere investigated. The structure and morphology of the latex products were characterized by FT-IR spectroscopy, TEM and AFM. The results indicated that a D₄^Vi-acrylate latex with a smooth surface coating and no obvious phase separation can be prepared using D₄^Vi, MMA, AA and BA with a polymerization temperature of 80℃ using HCl as a catalyst, with a catalyst loading of 1.8% of the mass of D₄^Vi. 