FIELD: chemistry.
SUBSTANCE: invention relates to high-molecular weight bimodal neodymium-catalysed polybutadienes. A high-molecular weight bimodal neodymium-catalysed polybutadiene has high content of cis-1,4-units >95% and low content of 1,2-vinyl-units <1%. The polybutadiene contains a linear polymer main fraction and a long-chain branched polymer fraction. The polymer main fraction has an inertial radius increase depending on molecular weight in double logarithmic graph greater than 0.5, and the long-chain branched polymer fraction lower than 0.3.
EFFECT: invention enables to obtain high-molecular weight bimodal polybutadiene which, in rubber mixtures and moulded articles, exhibits dynamic properties and good processing properties.
9 cl, 5 dwg, 2 tbl, 1 ex
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