摘要： 以甲基丙烯酸 －2－羟乙酯（HEMA）和聚甲基氢硅氧烷（PMHS）为原料，合成了甲基丙烯酸乙氧基聚甲基氢硅氧烷醚（MEPMHSE）。以甲基丙烯酸甲酯（MMA）、丙烯酸丁酯（BA）为主单体，加入合成的硅单体 MEPMHSE作为聚丙烯酸酯改性剂进行核壳乳液共聚合，制得平均粒径为135.2 nm，粒径分布窄（PDI＝0.045）的有机硅改性的具有核壳结构的聚丙烯酸酯乳液。采用 FT-IR、1H NMR对 MEPMHSE进行表征，并使用 TEM、DSC以及 Zeta电位及纳米激光粒径分析仪来表征乳胶粒子的结构与粒径。研究乳化剂的配比、含量以及 MEPMHSE的加入量对乳液稳定性、吸水率、凝胶量以及乳液胶膜疏水性的影响。研究结果表明：用 MEPMHSE改性的丙烯酸酯乳液胶膜的疏水性得到较大的提高，MEPMHSE添加量为 6%时，所得丙烯酸酯乳液胶膜对水的接触角由空白对照样的 65°提高到 98°。

关键词: 大分子乙烯基硅氧烷, 丙烯酸酯, 核壳乳液聚合

Abstract: A macromolecular vinyl siloxane monomer, methacryloxyethyl-polymethyl-hydrosiloxane ether(MEPMHSE )has been synthesized based on polymethyl-hydrosiloxane(PMHS) and 2-hydroxyethyl methacrylate(HEMA). The core-shell polyacrylate particles with the average size of 135.2 nm and narrower particle size distribution(PDI=0.045), was synthesized by core-shell emulsion polymerization method, in which methyl methacrylate( MMA), butyl acrylate(BA)were used as main monomers, methacryloxyethyl polymethyl-hydrosiloxaneether(MEPMHSE is added as polyacrylate modifier. The resulting silicone-containing monomer was characterized by FT-IR, 1HNMR, the structure and size of the latex particles were characterized by TEM, DSC and Nanometer laser particle size and zeta potential analyzer. The effect of the mass ration of emulsifier formulation, emulsion content and silicone monomer content on the stabbility of emulsion; the water absorption of latex film; gelatin rate on reaction and film of hydrophobic were discussed separately. The experiment showed that the hydrophobicity of silicone monomer modified acrylate was much better than regulate acrylate.The water-drop and the silicone modified acrylate latex film surfaces angel contact, compared with 65° of free-silicone acrylate latex, surpassed 98° with the silicone monomer usage amount of 6%.

Key words: macromolecular vinyl siloxane, acrylate, core-shell emulsion polymerization