A flat model approach to tethered bis(imino)pyridyl iron ethylene polymerization catalysts

W. Han; J.W. Niemantsverdriet; P.C. Thune

doi:10.1002/masy.200751421

A flat model approach to tethered bis(imino)pyridyl iron ethylene polymerization catalysts

W. Han, J.W. Niemantsverdriet, P.C. Thune

Inorganic Materials & Catalysis

Research output: Contribution to journal › Article › Academic

2 Citations (Scopus)

Abstract

A surface science model for a silica supported bis(imino)pyridyl iron complexes is applied to reveal the surface chemistry of these heterogeneous polymerization catalysts. The polymerization activity of these models and the molecular weight distribution of the resulting polymer are comparable to similar catalysts supported on amorphous silica. The catalyst deactivates partially during the first hour of ethylene polymerization. Based on photoelectron spectroscopy (XPS) we attribute this deactivation to iron extrusion by the aluminium alkyl activator.

Original language	English
Pages (from-to)	147-153
Number of pages	7
Journal	Macromolecular Symposia
Volume	260
Issue number	1
DOIs	https://doi.org/10.1002/masy.200751421
Publication status	Published - 2007

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abstract = "A surface science model for a silica supported bis(imino)pyridyl iron complexes is applied to reveal the surface chemistry of these heterogeneous polymerization catalysts. The polymerization activity of these models and the molecular weight distribution of the resulting polymer are comparable to similar catalysts supported on amorphous silica. The catalyst deactivates partially during the first hour of ethylene polymerization. Based on photoelectron spectroscopy (XPS) we attribute this deactivation to iron extrusion by the aluminium alkyl activator.",

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AB - A surface science model for a silica supported bis(imino)pyridyl iron complexes is applied to reveal the surface chemistry of these heterogeneous polymerization catalysts. The polymerization activity of these models and the molecular weight distribution of the resulting polymer are comparable to similar catalysts supported on amorphous silica. The catalyst deactivates partially during the first hour of ethylene polymerization. Based on photoelectron spectroscopy (XPS) we attribute this deactivation to iron extrusion by the aluminium alkyl activator.

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DO - 10.1002/masy.200751421

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EP - 153

JO - Macromolecular Symposia

JF - Macromolecular Symposia

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A flat model approach to tethered bis(imino)pyridyl iron ethylene polymerization catalysts

Abstract

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