The effect of conditions of preparation of a titanium catalyst for the propylene polymerization supported on magnesium chloride on the chemical composition, activity, and stereospecifity of the catalyst
The effect of the molar ratio of substrates on the yield and composition of the TiCl4 · ethyl benzoate (BE) complex has been investigated, the effect of hydration water content in the MgCl2 — carrier on the activity and stereosepecifity on the TiCl4 · BE/MgCl2-AlEt3 catalytic system in the polymerization of propylene determined and the dependence of polypropylene yield and stereospecifity on the presence of an external electron donor [BE, Si(OCH3)4, (C6H5)2Si(OCH3)2] and on catalyst aging characterized. It has also been found that a very strong 1680 cm-1band is present in infra-red spectrum of the MgCl2/TiCl4 · BE active calalyst chich is characteristic of a TiCl4 — bound carrier. There are also present weak 1620 cm-1 and 3500 cm-1 bands confirming a low content of OH groups.
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