Dinuclear ansa zirconocene complexes containing a sandwich and a half-sandwich moiety as catalysts for the polymerization of ethylene
摘要:
Dinuclear ansa zirconocene complexes containing a half-sandwich and a sandwich moiety and their ligand precursors have been synthesized and characterized. After activation with methylalumoxane (MAO), these catalysts produce polyethylenes with bimodal molecular weight distributions in homogeneous and heterogeneous media. The catalyst performances and the polymer properties were compared with mono nuclear reference catalysts. (C) 2002 Elsevier Science B.V. All rights reserved.
Diastereomeric amido functionalized ansa half-sandwich complexes of titanium and zirconium as catalyst precursors for ethylene polymerization to give resins with bimodal molecular weight distributions
作者:Alexander Reb、Helmut G Alt
DOI:10.1016/s1381-1169(01)00171-6
日期:2001.10
A total of 20 diastereomeric amido functionalized ansa half-sandwich dichloride complexes of titanium and zirconium have been prepared and characterized. All complexes were used as catalyst precursors for ethylene polymerization. Since such catalysts consist of diastereomers they have the potential to produce resins with a bimodal molecular weight distribution. (C) 2001 Elsevier Science B.V. All rights reserved.
Dinuclear ansa zirconocene complexes containing a sandwich and a half-sandwich moiety as catalysts for the polymerization of ethylene
作者:Helmut G Alt、Rainer Ernst、Ingrid K Böhmer
DOI:10.1016/s0022-328x(02)01673-x
日期:2002.9
Dinuclear ansa zirconocene complexes containing a half-sandwich and a sandwich moiety and their ligand precursors have been synthesized and characterized. After activation with methylalumoxane (MAO), these catalysts produce polyethylenes with bimodal molecular weight distributions in homogeneous and heterogeneous media. The catalyst performances and the polymer properties were compared with mono nuclear reference catalysts. (C) 2002 Elsevier Science B.V. All rights reserved.