二氧化硅与乙二醇在催化剂作用下直接合成了五配位硅酸酯 ,然后与氯乙醇反应制得了双羟基含硅化合物 ,该化合物与 2 ,4 -甲苯二异氰酸酯反应得到含硅聚氨酯。采用元素分析、FTIR ,1H -NMR表征了双羟基含硅化合物。结果表明 ,含硅聚氨酯的相对分子质量不高 ,相对分子质量分布比较宽 ,其数均相对分子质量、重均相对分子质量和分布宽度指数分别为 1790 ,6 2 0 0 ,3.4 6。含硅聚氨酯的玻璃化转变温度为 115 .1℃。 Silica and ethylene glycol directly synthesize pentacoordinated silicate under the action of catalyst and then react with chloroethanol to obtain bishydroxyl silicon compound, which is reacted with 2,4-toluene diisocyanate to obtain silicon-containing polyurethane. Binary hydroxyl silicon compounds were characterized by elemental analysis, FTIR and 1H-NMR. The results show that the relative molecular mass of the silicon-containing polyurethane is not high and the relative molecular mass distribution is relatively wide. The number average molecular weight, weight average molecular weight and distribution width index of the silicon-containing polyurethane are 1790, 6200 and 3464 respectively. The glass transition temperature of the silicone-containing polyurethane is 115 .1 ° C.