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K. Czaja, M. Białek, W. Ochędzan

Organometallic VCl4-based catalyst supported on MgCl2(THF)2
for ethylene polymerization – Rapid Communication

Polimery 1997, No 11-12, 714


DOI: dx.doi.org/10.14314/polimery.1997.714


Summary

A Ziegler—Natta catalyst was obtained by milling VCl4 with the magnesium support in the form of the MgCl2(THF)2 complex, followed by activation with an organoaluminum compound. This catalyst was employed in low-pressure polymerization of ethylene. The system was found to offer a very high activity and to polymerize ethylene at a rate of a few hundred kg PE/(g Vh) with the resulting molecular weight of the product very high. The kinetic investigation of the polymerization process revealed over 80% of the transition metal atoms to be involved in the forming catalytic active sites, under going virtually node activation over the period of time studied.


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