Study of Carbon Black Structures in Rubber

Abstract The effect of carbon-black structures in rubber were studied using dynamic testing techniques. The aspects studied were the effects of the degree of vulcanization and the degree of dispersion on dynamic modulus and loss. Relationships were established between electrical conductivity and dynamic modulus, and between the maximum dynamic viscosity and the carbon-black modulus changes on oscillation. Finally, use was made of carbon-black/paraffin-oil mixtures as model materials in order to explain the effect of carbon-black structures on the modulus enhancement of carbon-black-loaded vulcanizates.