新型铁系催化剂聚合丁二烯

以铁化合物Fe(CF3SO3)2为催化剂，烷基铝为助催化剂，亚磷酸二异辛脂(P8)为给电子体，研究了该催化体系对丁二烯的聚合行为。 结果表明， 催化体系（n(Fe)∶n(P8)∶n(Al)=1∶4∶20）具有良好的聚合活性和间同立构选择性，并且聚合活性和间同立构选择性随聚合温度升高而增加，50 ℃时可得到1,2-结构含量大于85%、间规度达99%以上的间同1,2-聚丁二烯；该催化体系具有很好的立体选择性和温度耐受性，克服了以往铁系催化体系立体选择性差、需要低温聚合的缺点，并且催化体系不涉及使用有毒、有害的催化剂组分。

Polymerization of Butadiene by Using a Novel Fe Catalyst System

Butadiene polymerization behaviors of Fe(CF3SO3)2Al(i-Bu)3 catalyst system using diisooctyl phosphite as electron donor have been investigated. The catalyst system(n(Fe)∶n(P8)∶n(Al)=1∶4∶20) shows fair good activity, syndioselectivity, and especially, both catalytic activity and syndioselectivity increases as elevating polymerization temperature, yielding polybutadiene with over 85% of 1,2-structure content and 99% of syndiotacticity at 50 ℃. Differentiating from the Fe catalyst systems reported earlier, the current catalyst system possesses much better syndioselectivity and thermal tolerance allowing polymerizing butadiene at relatively high temperature. Particularly, the catalyst system does not involve using any noxious components, implying premising practical application in the area of butadiene polymerization.