The Effect of Plasticization of Isoprene Rubber on the Bond Strength of Brecker Rubber to Metal Cord. Part 2. Influence of the Chemical Nature of Macromolecules

Abstract

The article presents the results of a study of the effect of macromolecules of different chemical nature of isoprene rubber (SKI-3), formed during its plasticization, on the amount of adhesion (A) of the breaker rubber to the metal cord (m/с). As a result, equations were obtained describing the value A of a brecker rubber, containing macromolecules of only a certain chemical type, depending on the temperature and time of plasticization of SKI-3. It turned out that alkyl and allylic macroradicals of SKI-3 significantly increase A to m/с. At the same time, the oxymacroradicals, appearing during mechanoactivated oxidative destruction, reduce the value of A. The recombination of different types of macroradicals, formed during the plasticization of SKI-3, has little effect on the value of A. Equations have been obtained that allow calculating A depending on the molecular weight and degree of destruction of SKI-3 macromolecules of different chemical nature.