The Effectiveness of a Comprehensive Study of Copolymers Exemplified by Commercial Nitril-Butadiene Rubbers

Abstract

Commercial nitril-butadiene rubbers were comprehensively studied by GPC, DSC, TGA, phase contrast microscopy and surface free energy determination via Owens-Wendt-Rabel-Kiellble method. Specific features were found for molecular mass distribution, phase transitions in negative and positive temperature intervals, the character of supramolecular assembly and microblock distribution of functional groups in BNKS-18AN and BNKS-18AMN rubber brands. A set of differences in initial rubbers macromolecular characteristics was shown, as well as the evolution of the latter during mechanical activaction of BNKS-18AN and BNKS-18AMN rubber brands