FIELD: chemistry of polymers. SUBSTANCE: claimed method is based on using highly efficient composition of homogeneous catalyst in at least one reactor to produce first copolymer having narrow composition distribution and narrow molecular weight distribution and highly efficient heterogeneous Zeigler catalyst in at least one other reactor. Depending on desired final product, reactors may operate in parallel or series,. New composition have good optical properties (transparency and turbidity) and good physical properties (e. g. modulus, ultimate fluidity, impact viscosity and tearing strength). Films, molded products and fibers are made from such compositions. EFFECT: more efficient polymerization method. 13 cl, 15 tbl
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