Amido functionalized ansa half-sandwich dichloride complexes of titanium, zirconium and hafnium with alkyl and ω-alkenyl substituents as homogeneous and self-immobilizing catalyst precursors for ethylene polymerization
作者:Helmut G Alt、Alexander Reb、Wolfgang Milius、Annette Weis
DOI:10.1016/s0022-328x(01)00781-1
日期:2001.5
A total of 24 amido functionalized ansa half-sandwich dichloride complexes of titanium, zirconium and hafnium with cyclopentadienyl or indenyl ligands have been prepared, characterized and used for catalytic ethylene polymerization. Alkyl and ω-alkenyl substituents on the aromatic system influence the polymerization activity of the catalysts and the properties of the produced polyethylene. After activation
总共制备了24种酰胺基官能化的钛,锆和ha的ansa半夹心二氯化物与环戊二烯基或茚基配体的络合物,表征并用于催化乙烯聚合。芳族体系上的烷基和ω-烯基取代基影响催化剂的聚合活性和所制得的聚乙烯的性能。用甲基铝氧烷活化后,ω-烯基取代的催化剂在乙烯聚合反应中表现出自固定化。