Abstract
The properties of polypropylene synthesized on a titanium-magnesium catalyst in a liquid monomer under various conditions are studied by X-ray spectroscopy, GPC and DSC. It is established that the properties of the polypropylene are independent of the type of titanium-magnesium catalyst used. The most important criterion, i.e. the isotacticity of the polypropylene is determined firstly by the type of stereo-regulating additives and the molar ratio of cocatalyst and additive, and also the polymerization temperature. The synthesized polypropylene has lower values of the degree of crystalline, enthalpy of melting, and of crystallization compared with polymers obtained on the basis of industrial, highly effective titanium trichloride.
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