种子乳液聚合法制备有机硅改性聚丙烯酸酯乳液  

Preparation of Silicone-modified Polyacrylate Emulsion by Seeded Emulsion Polymerization

作　　者：周建华[1] 谭文丽[1] 沈海平[1] 

机构地区：[1]陕西科技大学资源与环境学院,西安710021

出　　处：《有机硅材料》2009年第1期8-12,共5页Silicone Material

基　　金：陕西省教育厅专项科研计划项目(07JK202)

摘　　要：采用核壳乳液聚合技术,以端乙烯基硅油与丙烯酸酯类单体共聚,合成了有机硅改性聚丙烯酸酯乳液。考察了乳化剂类型、比例、用量以及甲基丙烯酸、甲基丙烯酸缩水甘油酯、乙烯基硅油的用量对乳液聚合稳定性及乳液性能的影响。结果表明,十二烷基苯磺酸钠(SDBS)和辛基酚聚氧乙烯(10)醚(OP-10)复配可产生协同效应,且m(SDBS)∶m(OP-10)=2、质量分数为3%～4%(相对于单体总质量)时,乳液的稳定性好;甲基丙烯酸缩水甘油酯的质量分数小于4%、端乙烯基硅油的质量分数小于8%时,乳液的聚合稳定性较好;随着甲基丙烯酸用量的增加,乳液的聚合稳定性增加,乳胶粒粒径变小。Silicone-modified polyacrylate emulsion was synthesized with vinylsilicone （VSI） oil and glycidyl methacrylate （GMA） as modifiers via core-shell emulsion polymerization. The effects of some parameters on the emulsion polymerization and emulsion properties were studied, such as the type, ratio and amount of emulsifier, the amount of methyl acrylic acid and glycidyl methacrylate, and the amount of vinyl silicone oil. The results showed that the composite emulsifiers of sodium dodecyl benzene sulfonate （SDBS） and octyl-phenyl polyoxyethylene ether （OP--10） were beneficial to the emulsion polymerization process, and the emulsion stability was good when the emulsifier dosage was 3% -4% with the SDBS/OP--10 mass ratio of 2/1. When the mass fractions of GMA were below 4% and VSI below 8% to the total mass of monomers, the emulsion with good stability of polymerization was obtained. With the increasing amount of MAA, the stability of polymerization process increased.

关 键 词：乙烯基硅油 聚丙烯酸酯 乳液 甲基丙烯酸缩水甘油酯 核壳结构 

分 类 号：TQ433.436[化学工程]