Article

A Flat Model Approach to Tethered Bis(imino)pyridyl Iron Ethylene Polymerization Catalysts

  1. Wei Han,
  2. Hans (J.W.) Niemantsverdriet,
  3. Peter C. Thune*

Article first published online: 7 JAN 2008

DOI: 10.1002/masy.200751421

Issue

Macromolecular Symposia

Macromolecular Symposia

Special Issue: Heterogeneous Ziegler-Natta Catalysts

Volume 260, Issue 1, pages 147–153, January 2008

Additional Information

How to Cite

Han, W., Niemantsverdriet, H. and Thune, P. C. (2007), A Flat Model Approach to Tethered Bis(imino)pyridyl Iron Ethylene Polymerization Catalysts. Macromolecular Symposia, 260: 147–153. doi: 10.1002/masy.200751421

Author Information

  1. Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands

*Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands Fax +31 402473481;

Publication History

  1. Issue published online: 7 JAN 2008
  2. Article first published online: 7 JAN 2008

Funded by

  • Netherlands Technology Foundation (STW). Grant Number: 790.35.706

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Keywords:

  • bis(imino)pyridyl iron catalyst;
  • catalyst deactivation;
  • model catalyst;
  • photoelectron spectroscopy;
  • polyethylene

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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