Abstract
AbstractA highly dispersed MgCl2‐supported TiCl3 catalyst was conveniently prepared by treating the complex of TiCl3 · 3 C5H5N with AlEt2Cl in the presence of MgCl2. The catalyst combined with AlEt3 showed a very high activity for the polymerization of propylene, and gave a polymer with considerably high isotacticity. The catalyst displayed a sharp ESR signal with a g‐value of 1,94, which is identical with that of the ground H‐grade TiCl3.
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