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采用多步种子乳液聚合法,在微波辐射下,以丙烯酸丁酯、甲基丙烯酸甲酯、γ-(甲基丙烯酰氧)丙基三甲氧基硅烷和甲基丙烯酸六氟丁酯为原料制备了具有核壳结构的含氟硅丙烯酸酯共聚物乳液。利用FT-IR、DSC、TG、TEM表征了共聚物的结构、乳胶膜的热稳定性、乳胶粒子的形态。考察了共聚物乳液的表面张力及稳定性。结果表明,所得到的乳胶粒子具有明显的核壳结构,氟硅单体的加入降低了共聚物乳液的表面张力,显著提高了乳胶膜的热稳定性。与常规加热相比,微波辐射聚合能够得到更好的核壳结构乳胶粒,且乳液具有更好的耐寒和离心稳定性。
Using multi-step seed emulsion polymerization, under the microwave irradiation, butyl acrylate, methyl methacrylate, γ- (methacryloyloxy) propyltrimethoxysilane and hexafluorobutyl methacrylate as raw materials A fluorine-containing silicone acrylate copolymer emulsion having a core-shell structure was obtained. The structure of the copolymer, the thermal stability of the latex film and the morphology of the latex particles were characterized by FT-IR, DSC, TG and TEM. The surface tension and stability of the copolymer emulsion were investigated. The results show that the latex particles obtained have obvious core-shell structure. The addition of fluorosilicone decreases the surface tension of the copolymer emulsion and significantly improves the thermal stability of the latex film. Compared with the conventional heating, microwave radiation polymerization can get better core-shell latex particles, and the emulsion has better cold resistance and centrifugal stability.