ANALYSIS OF HIGH-STRAIN HYSTERESIS LOSS OF NONLINEAR RUBBERY POLYMER

With the use of the Boltzmann superposition principle, a statistical t heory of rubber elasticity, and phenomenological theory, the hysteresi s loss at high strain (greater than 100%) of nonlinear viscoelastic ma terials has been quantified in terms of material parameters. The theor y incorporates both experimental and analytical parameters. The experi mental results for natural rubber (NR) and styrene-butadiene rubber (S BR) vulcanizates having variations of loading of carbon black, silica, clay, resin and curatives are in good accord with the theoretical pre dictions.