Physico-chemical characterization of polyethylenes obtained in the presence
of different catalysts containing alkoxyligands (in English)
The effect of the kind and number of alkoxy ligands (OR) in organometallic Ti-Al catalyst on the properties of polyethylenes obtained i.e. molecular weight, mechanical and rheological properties, density, crystallinity, melting point, heat of fusion and number of chain branches was studied. Polyethylene obtained over Ti-Al catalyst with OR ligands has particularly high molecular weight, high density, better mechanical properties, higher resistance to heat, different rheological characteristics and lower number ot chain branches in comparison with standard HDPE. It is possible to control the polyethylene synthesis process and to obtain the polymer of required properties by selecting the OR ligands in the titanium component of the catalytic system.
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