FIELD: polymeric compounds. SUBSTANCE: method of polymer preparing involves the polymerization of styrene, p-methylstyrene or tert. -butylstyrene in the presence of titanium-containing catalyst of the general formula [Cp.TiX2]+A-, where Cp - cyclopentadiene or pentamethylcyclopentadiene; X - methyl, benzyl or trimethylsilylmethyl; A- - tetra(pentafluorophenyl)borate, at molar ratio monomer: titanium from 3700: 1 to 125700: 1. Polymer obtained shows stereoregular structure, which exceeds by more than 50% syndiotacticity of racemic triad at 25-70 C. Polystyrene obtained shows high degree of syndiotactic properties and can be used for making of films, sheets and foam plastics. EFFECT: enhanced quality of polymer. 3 tbl
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