八甲基环四硅氧烷一氯代物微乳液聚合及其消泡性能  

Microemulsion Polymerization and Antifoam Emulsion Performance of Chloro-Octamethylcyclotetrasiloxane

作　　者：戚桂斌[1] 贝逸翎[1] 刘庆阳[1] 王爱琴[1] 

机构地区：[1]山东大学化学与化工学院,济南250100

出　　处：《应用化学》2009年第1期122-124,共3页Chinese Journal of Applied Chemistry

摘　　要：采用偏光显微镜研究了八甲基环四硅氧烷一氯代物(D4Cl)/十六烷基三甲基溴化铵(CTAB)/乙二醇/水4组分微乳液的相行为,绘制了该体系在80℃下的拟三元相图;采用粒度分析研究了八甲基环四硅氧烷一氯代物在上述体系中的微乳液聚合成核机理,对其微乳液在水体系中的消泡性能进行了研究。结果表明,该微乳聚合主要发生在水相,体系中的环单体微滴主要提供开环的端羟基硅氧烷的齐聚物;氯甲基的引入增大了硅氧烷的极性,从而增加了微乳液的消泡性能。The phase behavior of a pseudo-ternary system of chloro-octamethylcyclotetrasiloxane/CTAB/ glycol/water was studied with a polarimicroscope, and the pseudo-ternary phase diagram at 80 ℃ was obtained. The microemulsion polymerization was carried out with varing ratios of components, and the nucleation mechanism was discussed according to the results of the particle size distribution analysis. The antifoam performance of the microemulsion was also investigated. Results show that the microemulsion polymerization took place in water phase. Moreover, the monomer droplets provided siloxane oligomers with end-hydroxyl, and the microemulsion exhibits a better antifoam emulsion performance than that of commercial emulsion due to the introduction of chloromethyl into the siloxane.

关 键 词：八甲基环四硅氧烷一氯代物 有机硅微乳液 微乳液聚合 消泡性能 

分 类 号：O643.3[理学—物理化学]