介孔SiO_2球负载镍配合物催化苯乙烯聚合

Styrene Polymerization Catalyzed by Mesoporous SiO_2 Sphere Supported Nickel Complexes

介孔SiO_2球与三齿镍配合物通过偶联反应制备了一种新型负载镍系催化剂,通过红外光谱、粉末衍射、扫描电镜等进行了表征。在三甲基铝的活化下,制备的负载型催化剂对苯乙烯聚合反应表现出中等催化活性。所得聚合产物经凝胶色谱、红外光谱、核磁共振谱等进行了表征,结果表明,所得聚苯乙烯为无规聚苯乙烯,分子量中等(Mn^104)。

A new mesoporous SiO_2 sphere supported nickel pre-catalysts were prepared from the tridentate nickel complexes and mesoporous SiO_2 sphere through coupled reaction,which have been characterized by IR,XRD,SEM,etc. Employing TMA as cocatalyst,the prepared supported pre-catalyst exhibited moderate catalytic activities for styrene polymerization. Characterized by GPC,NMR and IR etc,the obtained polystyrene was in atactic microstructure,moderate molecular weight（ Mn^104）.