论文部分内容阅读
用共沉淀法制备了不同钕、铁含量的NdCl_3和FeCl_3邻菲罗啉(phen)络合物,并与AlH(i-Bu)_2组成Ziegler-Natta型催化剂,发现这种混合催化剂在合适的Fe/Nd比范围内,对丁二烯的聚合活性高于单一稀土或铁催化剂,尤其是产物的微观结构,可随催化剂中铁、钕含量不同而有较大幅度的变化(cis-1,4含量98—40%,1,2含量1—49%左右,考察了AI/M(M=Nd+Fe的摩尔数)和溶剂对聚合活性的影响,随Al/M的变化,催化剂的活性出现一个高峰;并随催化剂用量不同,活性高峰处的Al/M值也不同,溶剂对催化利活性的影响也很大,其顺序是:甲苯≈苯>环已烷>正己烷,即芳烃>脂环烃>直链烃。
The co-precipitation method was used to prepare NdCl3 and FeCl3 phenanthroline complexes with different neodymium and iron contents. Ziegler-Natta catalyst was synthesized with AlH (i-Bu) Fe / Nd ratio, butadiene polymerization activity is higher than a single rare earth or iron catalyst, especially the microstructure of the product, with the catalyst content of iron and neodymium have a more substantial change (cis-1,4 The content of 98-40%, 1,2 content of 1-49% about the Al / M (M = Nd + Fe number of moles) and solvent on the polymerization activity, with Al / M changes, the catalyst activity A peak; and with the amount of catalyst, the Al / M value at the peak activity is also different, the solvent on the catalytic activity is also a great influence, the order is: toluene ≈ benzene> cyclohexane> n-hexane, aromatic hydrocarbons> Cyclic hydrocarbons> Linear hydrocarbons.