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The efficient synthesis of two new monomers, vinyltris(dimethylsiloxy)silane (2) and tris(dimethylvinylsiloxy)silane (3), was developed. Hydrosilation of these new A–B3 monomers affords highly branched starburst poly(siloxysilane) polymers. Polymerization of2 yields a polymer structure that has siliconhydride functional groups on the outer sphere. Polymerization of3 yields a polymer that has the same hyperbranched poly(siloxysilane) core as the polymer produced from2, but the outer sphere contains vinyl moieties. The presence of silicon-hydride or vinyl groups on the surface of both polymers allows functionalization of these materials with a wide variety of reagents.Presented at the XXVIth Silicon Symposium, Indiana University—Purdue University at Indianapolis, March 26–27, 1993. 相似文献
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聚醚酯改性聚硅氧烷消泡剂的合成与表征 总被引:1,自引:0,他引:1
以自制月桂酸烯丙基聚氧乙烯聚氧丙烯酯、低含氢硅油(PHMS)为原料,在氯铂酸的催化下制得聚醚酯改性硅油,通过红外光谱对其进行表征.考察了反应温度、反应时间、n(聚醚酯)n(PHMS)对硅氢化反应的影响.结果表明:在80℃、5.5 h、n(聚醚酯)∶n(PHMS)=1.20∶1工艺条件下,反应转化率可达92.4%. 相似文献
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采用硅氢加成法,在反应温度为85℃~90℃,反应时间为3.5 h~4.0 h,催化剂含量为反应物总量0.005%~0.01%且无溶剂的条件下,同时将亲水基团烯丙基聚氧乙烯聚氧丙烯醚、疏水基团含氟单体或长链烷基酯分别引入到202低含氢硅油的侧链,成功制得两种高疏水基水性聚合物。采用红外光谱和透射电子显微镜对有关产物及其水分散物进行了结构分析,并系统研究了其水分散物的透光率、流变性、表面张力等性能,结果表明,两种含高疏水基水性聚合物都具有明显的降低表面张力效应,在质量分数为2%的产物的水分散物的表面张力降低至20 N/m~26 N/m,且具有剪切变稠现象。 相似文献