A-187改性核壳型聚丙烯酸酯乳液的制备及性能表征

Preparation and characterization of core-shell polyacrylate emulsion modified with γ-glycidoxy propyl trimethoxy silane

以甲基丙烯酸甲酯、丙烯酸丁酯、丙烯酸-2-乙基己酯、γ-(2,3-环氧丙氧基)丙基三甲氧基硅烷(A-187)等为原料,过硫酸铵为引发剂,通过种子乳液聚合法制备了具有核-壳结构的A-187改性聚丙烯酸酯(SACR)系列微复合高分子乳液。表征了乳胶粒子的结构形态及粒度分布,测定了聚合物的玻璃化转变温度、拉伸强度和聚合物薄膜的吸水率。所得SACR系列微复合聚合物乳液的乳胶粒子具有核壳结构,粒径分布较窄,聚合物的玻璃化转变温度随A-187加量的增加有所升高,聚合物的力学性能和聚合物的耐水性能有所改善。

Polyacrylate latexes（SACR） modified with y-glycidoxy propyl trimethoxy silane （ A-187 ） was prepared with methyl methacrylate, butyl acrylate, 2-ethylhexyl acrylate, A-187 as monomers and ammonium persulfate as initiator by the seeded emulsion polymerization. Its size distribution and morphology were characterized, and the glass transition temperature, the tensile strength and the absorption rate were measured. The SACR latex particles prepared have a core-shell morphology with a narrow size distribution. Besides, the glass transition temperature, the mechanical property, and the water resistant property are improved with the concentration of A-187 increased.