HYSTERESIS LOSS IN FILLED RUBBER VULCANIZATES AND ITS RELATIONSHIP WITH HEAT-GENERATION

A relationship between heat generation of filled rubber vulcanizates a nd hysteresis loss, specific heat, thermal conductivity, modulus, fill er loading, structure, and surface area of the filler, the temperature difference between application temperature and glass transition tempe rature, frequency, temperature difference between the wall and the env ironment, stress, and stroke amplitude were developed. Styrene-butadie ne rubber (SBR) and natural rubber (NR) vulcanizates were used that ha d variations of loading of carbon black, silica, resin and coupling ag ent, types of filler, level of curatives, and cure time. The derived e quation was verified with a set of a few unknown SBR and NR vulcanizat es, and also by varying the stress and stroke amplitudes in the heat g eneration experiment. (C) 1997 John Wiley & Sons, Inc.