【摘要】 <正> 利用环氧氯丙烷(ECH)的开环聚合,制备特种耐油合成橡胶,是近十余年发展起来的。本文发现由三异丁基铝(Al)、亚乙基脲(Eu)和三苯基膦(TPP)组成的三元催化剂是ECH聚合用的优良催化剂,其催化活性高,可获得分子量达70—130万的无定形聚合物,聚合速率受温度的影响较小,适宜在室温下聚合。更多还原

【Abstract】 A catalyst system consisting of triisobutylalumimum, ethyleneurea, and triphenyl-phosphine for the polymerization of epichlorohydrin (ECH) has been investigated. This system showed high polymerization activity for ECH and it was confirmed by inherent viscosity and crystallinity that the resultant ECH polymer has high molecular weight (Mη =70-130×104) and is completely amorphous. As the initiation reaction of this polymerization needs only very low activation energy, this new ternary catalyst can be used to polymerize ECH at room temperature.更多还原