FIELD: chemical technology. SUBSTANCE: method involves copolymerization of vinylaromatic hydrocarbons and coupled dienes in organic solvent medium by action of "live" prepolymers prepared by polymerization of vinylaromatic hydrocarbons on lithium-organic catalyst. Prepolymer is separated for two flows. On the first flow copolymerization of vinylaromatic hydrocarbon is carried out. The obtained polymer is used as polyvinylaromatic filling agent for addition to reaction mass after prepolymer branching in the first flow. Method is used for thermoelastoplastics making. EFFECT: improved method of synthesis. 1 dwg
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