选用5种型号的白炭黑补强室温硫化(RTV)硅橡胶泡沫材料,探讨了不同制备方法及表面改性的白炭黑对硅橡胶泡沫制备过程中基础胶料流变性能和硅橡胶泡沫力学性能的影响.结果表明,白炭黑用量相同时,添加疏水性白炭黑的胶料的固化速率比添加亲水性白炭黑的快；随着气相法白炭黑含量的增加,固化速率加快,而沉淀法白炭黑却相反；沉淀法白炭黑在硅橡胶中的分散性不及经疏水处理的气相法白炭黑；随着白炭黑含量的增大,硅泡沫的泡孔变小,拉伸强度提高.%Room temperature vulcanization(RTV) silicone foam materials have been prepared by using five kinds of silica as reinforcing fillers. The effects of silica by different preparation methods and surface modification on the rheological property and foam mechanical properties of the based-compound during the silicone foam preparation were investigated in detail. The results indicated that the curing rate of the based-compound filled with the hydrophobic silica was faster than that filled with the hydrophilicity silica.in case of the same weight addition of the silica; the curing rate increased as the content of the fumed silica increased, whereas the curing rate decreased as the precipitation silica increased; the dispersity of the precipitated silica in the silicone rubber matrix is inferior to that of the fumed silica with hydrophobic modification. As the silica content increased, the holes size of the silicone rubber foam materials became smaller while the tensile-strength of them improved.
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