研究了MoCl_3(RCOO)_2-(i-Bu)_2AlO■CH_3(Mo-Al)催化体系在加氢汽油中合成1,2-聚丁二烯的催化行为。考察了 R 基结构、碳原子数对催化剂的溶解性、催化活性、聚合物分子量以及微观结构的影响。试验结果表明,主催化剂(Mo)中羧酸配体的静电效应对催化剂的溶解性、催化活性影响较显著,增加 Mo 上电子云密度有利于提高催化体系的反应活性;催化剂活性中心周围环境的空间位阻增大时聚合物中1,2-链节的全同立构规整度显著提高。 The catalytic activity of MoCl_3 (RCOO) _2- (i-Bu) _2AlO_CH_3 (Mo-Al) catalyst for the synthesis of 1,2-polybutadiene from gasoline was studied. The effects of the structure of R group, the number of carbon atoms on the solubility of the catalyst, the catalytic activity, the molecular weight of the polymer and the microstructure were investigated. The experimental results show that the electrostatic effect of the carboxylic acid ligand in the main catalyst (Mo) has a significant effect on the solubility and catalytic activity of the catalyst. Increasing the electron cloud density on the Mo increases the reactivity of the catalytic system. The environment surrounding the active site of the catalyst When steric hindrance increases, the isotacticity of 1,2-mer in the polymer increases significantly.