【摘要】 以甲基二氯硅烷、四甲基四乙烯基环四硅氧烷(D4Vi)为原料,采用硅氢加成反应合成了星型聚合物的中间体环硅氧烷核,并用红外光谱和核磁共振谱进行了表征。反应的最佳条件是:采用预先活化、反应温度72℃、催化剂与D4Vi的量之比为1.0×10-4,反应转化率可达95%,且选择性很好,产物主要为β-加成产物。更多还原

【Abstract】 The star-shaped polymer’s cyclosiloxane core was synthesized by hydrosilylation with dimethyldichlorosilane and 2,4,6,8-tetravinyl-2,4,6,8-tetramethylcyclotetrasiloxane as raw materials,and characterized by infrared spectroscopy and nuclear magnetic resonance spectroscopy.The preferred reaction conditions included pre-activation,temperature of 72 ℃,relative ratio between catalyst and DVi4 was 1.0×10-4.The reaction conversion reached 95%,with good selectivity where mainlyβ-addition products were obtained.更多还原