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研究了 V (acac) 3- Al(i- Bu) 2 Cl催化体系的相态 .通过 Tyndall效应、电镜观察和超过滤实验 ,证明了在溶有丁二烯的甲苯溶剂中 V(acac) 3- Al(i- Bu) 2 Cl催化体系以小颗粒分散 ,粒径在 1～ 10 0 nm之间 ,为胶体催化剂 ,属于高度分散的多相催化体系 .催化剂颗粒是无定形的 ,其活性中心位于胶粒表面 .以较佳配比所得到的催化剂颗粒较小、分布均匀 ,对丁二烯聚合反应具有较高的催化活性 .
The phase state of V (acac) 3-Al (i-Bu) 2 Cl catalyst system was investigated by Tyndall effect, electron microscopy and ultrafiltration experiments. It was proved that V (acac) 3 - Al (i-Bu) 2 Cl catalyst is dispersed in small particles with a particle size of 1-1000 nm, which is a colloidal catalyst and belongs to highly dispersed heterogeneous catalytic system. The catalyst particles are amorphous and their active centers Located on the surface of the colloidal particles.The catalyst particles obtained by the better ratio are smaller and distributed evenly, and have higher catalytic activity for butadiene polymerization.