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将无定型二氧化硅与乙二醇、氢氧化钾在 196℃反应 ,制成高反应活性的五配位硅钾化合物 ,并以此为原料与 2 -氯乙醇反应制成双羟基四配位有机硅单体 ,通过该单体与对苯二甲酰氯、 2 ,4-甲苯二异氰酸酯、低摩尔质量的异氰酸酯基封端的聚醚进行低温溶液缩聚反应合成了含硅聚酯、含硅聚氨酯、含硅聚醚氨酯 ;用IR、TG、GPC对产物进行了结构表征。结果表明 ,这些聚合物由于引进了硅元素 ,热稳定性有所提高 ,摩尔质量一般为几十万
The amorphous silica is reacted with ethylene glycol and potassium hydroxide at 196 ° C to form the five-coordination silicon-silicon compound with high reactivity, and the reaction between the amorphous silica and the 2-chloroethanol to produce the dihydroxy tetra-coordinated Organic silicon monomer is synthesized by the polycondensation reaction between the monomer and terephthaloyl chloride, 2,4-toluene diisocyanate and low molar mass isocyanate-terminated polyether in the low temperature solution. The silicon-containing polyester, silicon-containing polyurethane, Silicone polyether urethanes were synthesized. The products were characterized by IR, TG and GPC. The results show that these polymers due to the introduction of silicon, thermal stability has improved, the molar mass is generally hundreds of thousands