乙烯基三乙氧基硅烷/丙烯酸酯共聚乳液的研究

以聚丙烯酸丁酯为种子乳液，将乙烯基三乙氧基硅烷（VTES）与丙烯酸酯进行乳液共聚，制成了聚合稳定性良好，性能稳定的有机硅／丙烯酸酯共聚乳液，详细讨论了VTES用量对聚合过程稳定性和乳液粒径大小及分布的影响，采用动态光散射法跟踪了聚合过程的粒径大小及分布，采用TEM表征了粒子形态；同时研究了乳液的粘度及乳胶膜的耐水性能，结果表明：乳胶粒的平均粒径随聚合时间的延长逐渐增大，乳胶粒呈球形，具有核壳结构，随着VTES用量的增加，乳液聚合的稳定性变差，乳胶粒的平均粒均增大，乳液的粘度增加，乳胶膜的吸水率减小。

Study on Copolymerization Emulsion of Vinyl Triethoxyl Silane & Acrylate

Silicone/acrylate copolymer emulsion with excellent stability of polymerization and performance was prepared by copolymerization of vinyl triethoxy silane(VTES) and acrylate monomers,taking poly(butyl acrylate) as seed emulsion. The effects of VTES content on the stability of emulsion polymerization,particle size and distribution of the emulsion were discussed in detail. The particle size and distribution was characterized by dynamic light scattering. Morphology of the emulsion particles was indicated by transmission electron microscopy(TEM). In the mean time,viscosity of emulsion and water resistance of emulsion film was studied.The result shows that the average particle size increases gradually with protracted polymerization time. The morphology of the emulsion particles is spherical,with core shell structure. During the process of copolymerization,with the increasing content of VTES,the stability of emulsion polymerization becomes bad,the average particle size expands,the viscosity of emulsion increases,and water absorption of emulsion film decreases.