Effect of 1-hexene on the propylene polymerization with supported phthalate-free titanium–magnesium catalyst

The polymerization of propylene with small amounts of 1-hexene in the presence of supported titanium–magnesium catalyst containing two internal non-phthalate donors was accomplished. Polypropylene modification with small amounts of 1-hexene affects the thermophysical properties and molecular weight characteristics of the polymers. The activation mechanism of the reaction is described; the introduction of small amounts of 1-hexene causes an increase in activity by a factor of 1.5.