Abstract
1. The kinetics of the polymerization of ethylene and the kinetics of the reduction of titanium tetrachloride by diethylaluminum chloride were compared at 30°, molar ratios AlEt2Cl ∶ TiCl4 0.6 ∶ 1, 1.2 ∶ 1, and 2.4 ∶ 1; initial AlEt2Cl concentration 7.4 · 10−3 M. 2. The influence of additions of AlEtCl2 on the kinetics of the polymerization of ethylene was studied under conditions of a steady-state action of the catalyst TiCl4-AlEt2Cl and under conditions when the rate of polymerization in the presence of TiCl4 and AlEt2Cl varies with time. 3. In the catalytic systems that arise in the interaction of TiCl4 and organoaluminum compounds, in addition to aluminum alkyls, there are other cocatalysts (titanium alkyls or complexes of TiCl4 with titanium alkyls or aluminum alkyls), which, being adsorbed on the surface of the catalytic precipitate, form the most active centers of polymerization.
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Schedule a callMore From: Bulletin of the Academy of Sciences, USSR Division of Chemical Science
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