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Polymer Science Series B

, Volume 49, Issue 3–4, pp 85–90 | Cite as

Polymerization of ethylene with the (C5H5)4Zr-methylaluminoxane soluble catalytic system

  • P. E. Matkovskii
  • V. D. Makhaev
  • S. M. Aldoshin
  • L. N. Russiyan
  • G. P. Startseva
  • Yu. I. Zlobinskii
  • I. V. Sedov
Article

Abstract

The effects of catalyst concentration, Al-to-Ti molar ratio, hydrogen additives, and time of aging of catalyst components on the kinetic features of ethylene polymerization in the presence of the (C5H5)4Zr-methylaluminoxane soluble catalytic system in toluene and hexane at 60°C and an ethylene pressure of 0.6 MPa have been studied. It has been demonstrated that the highest activity and productivity of the title system is achieved in the presence of 0.9% H2 in the gas phase of a reactor (2180 kg PE/(g Zr h)). When polymerization is carried out in hexane, the rate constant of chain propagation is lower by a factor of ∼1.5 than that in the case of toluene and the catalytic system is characterized by a long lifetime.

Keywords

Polymer Science Series Melt Flow Index Hydrogen Additive Ethylene Consumption Metallocene Catalyst 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Pleiades Publishing, Ltd. 2007

Authors and Affiliations

  • P. E. Matkovskii
    • 1
  • V. D. Makhaev
    • 1
  • S. M. Aldoshin
    • 1
  • L. N. Russiyan
    • 1
  • G. P. Startseva
    • 1
  • Yu. I. Zlobinskii
    • 1
  • I. V. Sedov
    • 1
  1. 1.Institute of Problems of Chemical PhysicsRussian Academy of SciencesChernogolovka, Moscow oblastRussia

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