Mammadov, ShirazG. H., AzizovabR. F., Khankishiyeva2023-09-032023-09-0320232170-16X2588-2082http://hdl.handle.net/123456789/14852A new class of active organic crosslinking agents for the vulcanization of NBR on the basis of chlorine-containing compounds (CCAC) has been found, allowing to improve significantly the rheological and structural parameters of NBR. Gel content and Mooney viscosity in binary systems after plastification on rollers were studied. The sol fraction of cross-linked NBR (SKN-40+CCAC) was found to be characterized by a bimodal MWD. Abnormally high value of MW/Mns of sol fractions is associated with the bimodal nature of their MWD and indicates the presence of gel in the elastomer. The value of Mη of the sol fractions in cross-linked NBR was found to be insignificant. The sol fraction of cross-linked HCPX elastomer was shown to have lower values of the specified parameters and lower content of high-molecular weight fractions. The branching density ρ of macromolecules of sol fraction of cross-linked NBR was 1.90-2.3·10-3, i.e. on average corresponded to one monomer unit and two hundred branching nodes per molecule.enNitrile butadiene rubberHexachloroparaxyleneMooney viscositySol fractionRheologyCrosslinkingVulcanizationArticle