Article

Micron-granula polyolefin with self-immobilized nickel and iron diimine catalysts bearing one or two allyl groups

  1. Guoxin Jin1,2,*,
  2. Dao Zhang2

Article first published online: 8 JAN 2004

DOI: 10.1002/pola.11050

Issue

Journal of Polymer Science Part A: Polymer Chemistry

Journal of Polymer Science Part A: Polymer Chemistry

Volume 42, Issue 4, pages 1018–1024, 15 February 2004

Additional Information

How to Cite

Jin, G. and Zhang, D. (2004), Micron-granula polyolefin with self-immobilized nickel and iron diimine catalysts bearing one or two allyl groups. Journal of Polymer Science Part A: Polymer Chemistry, 42: 1018–1024. doi: 10.1002/pola.11050

Author Information

  1. 1

    Laboratory of Molecular Catalysis and Innovative Material, Department of Chemistry, Fudan University, Shanghai 200433, China

  2. 2

    State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China

*Laboratory of Molecular Catalysis and Innovative Material, Department of Chemistry, Fudan University, Shanghai 200433, China

Publication History

  1. Issue published online: 8 JAN 2004
  2. Article first published online: 8 JAN 2004
  3. Manuscript Accepted: 24 OCT 2003
  4. Manuscript Received: 6 MAY 2003

Funded by

  • National Nature Science Foundation of China. Grant Numbers: 29974029, 29925101
  • Special Funds for Major State Basic Research Projects. Grant Number: G 1999064800

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Keywords:

  • catalysts;
  • nickel;
  • iron;
  • molecular structure;
  • self-immobilization;
  • micron-granula polymer

Graphical Abstract

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Nickel and iron diimine catalysts bearing one or two allyl groups can be used as catalysts for ethylene polymerization with high catalytic activities in the presence of modified methylaluminoxane (MMAO). The allyl substituents induced self-immobilization of the originally homogeneous catalysis and produced the micron-granula particles of polyethylene. The molecular structure of nickel catalyst [o,o′-bis(4-allyl-2,6-diisopropylphenyl-imino)acenaphthene] nickel(II) dibromide was characterized by crystallographic analysis.

Abstract

Self-immobilized nickel and iron diimine catalysts bearing one or two allyl groups of [ArN[DOUBLE BOND]C]2(C10H6)NiBr2 [Ar = 4-allyl-2,6-(i-Pr)2C6H2] (1), [ArN[DOUBLE BOND]C(Me)][Ar′N[DOUBLE BOND] C(Me)]C5H3NFeCl2 [Ar = Ar′ = 4-allyl-2,6-(i-Pr)2C6H3, Ar = 2,6-(i-Pr)2C6H3, and Ar′ = 4-allyl-2,6-(i-Pr)2C6H3] were synthesized and characterized. All three catalysts were investigated for olefin polymerization. As a result, these catalysts not only showed high activities as the catalyst free from the allyl group, such as [ArN[DOUBLE BOND]C]2C10H6NiBr2 (Ar = 2,6-(i-Pr)2C6H2)], but also greatly improved the morphology of polymer particles to afford micron-granula polyolefin. The self-immobilization of catalysts, the formation mechanism of microspherical polymer, and the influence on the size of the particles are discussed. The molecular structure of self-immobilized nickel catalyst 1 was also characterized by crystallographic analysis. © 2004 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 42: 1018–1024, 2004

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