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首页> 外文期刊>Journal of Applied Polymer Science >Microemulsion polymerization of siloxane with nonionic surfactants as emulsifiers
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Microemulsion polymerization of siloxane with nonionic surfactants as emulsifiers

机译：硅氧烷与非离子表面活性剂作为乳化剂的微乳液聚合

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Polysiloxane nanolatices were prepared by the microemulsion polymerization of octamethylcyclotetrasiloxane (D-4) with nonionic polyoxyethylene alkyl ether and polyoxyethylene aryl ether as surfactants, ethylene glycol or aminoethanol as a cosurfactant, and potassium hydroxide or dipotassium dimethylsilanolate (I) as an initiator. The effect of the different initiators and the amount of cosurfactant on the microemulsion polymerization rate of D-4 was investigated. The initiator, potassium hydroxide, had a similar catalytic activity to I, and adding the cosurfactant changed a common siloxane emulsion to a microemulsion. At a same reaction conditions, the polymerization rate of D-4 with aminoethanol as a cosurfactant was much faster than that of ethylene glycol. The kinetics of this siloxane micro-emulsion polymerization was consistent with Morgen-Kaler theory. The transparency value of the resultant polysiloxane nanolatex was more than 95% when the amount of ethylene glycol was more than 25% and the siloxane amount was about 30 wt % of the ceaction mixture. A nanolatex of polydimethylsiloxane-co-polyvinylmethylsiloxane, which was crosslinked with potassium persulfate, revealed that the mean diameter of the droplets was 32 nm with a narrow distribution. (C) 2003 Wiley Periodicals, Inc. [References: 25]
机译：通过八甲基环四硅氧烷（D-4）与非离子型聚氧乙烯烷基醚和聚氧乙烯芳基醚作为表面活性剂，乙二醇或氨基乙醇作为助表面活性剂，氢氧化钾或二甲基硅硅烷醇二钾（I）的微乳液聚合制备聚硅氧烷纳米晶格。研究了不同引发剂和助表面活性剂的用量对D-4微乳液聚合速率的影响。引发剂氢氧化钾具有与I相似的催化活性，并且添加助表面活性剂将普通的硅氧烷乳液转变为微乳液。在相同的反应条件下，以氨基乙醇为助表面活性剂的D-4的聚合速率要快于乙二醇。该硅氧烷微乳液聚合的动力学与Morgen-Kaler理论一致。当乙二醇的量大于25％且硅氧烷的量为硅酸盐混合物的约30wt％时，所得的聚硅氧烷纳米胶乳的透明度值大于95％。用过硫酸钾交联的聚二甲基硅氧烷-共-聚乙烯基甲基硅氧烷的纳米胶乳显示，液滴的平均直径为32 nm，分布较窄。 （C）2003 Wiley Periodicals，Inc. [参考：25]

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