RHEOLOGICAL MODELS OF RUBBER CARBON-BLACK COMPOUNDS - LOW INTERACTIONVISCOELASTIC MODELS AND HIGH INTERACTION THIXOTROPIC PLASTIC VISCOELASTIC MODELS

The rheological behavior of a gum elastomer (natural rubber) and its c arbon black compounds is represented in terms of a series of interrela ted models. A distinction is made between those compounds with low int eraction (large particles or low loadings of small particles) and thos e with high interaction (large loadings of small particles). The low i nteraction compounds are treated as viscoelastic materials with filler loading modified properties. The high interaction compounds are repre sented as 'thixotropic-plastic-viscoelastic' materials. The basic non- linear viscoelastic model used in this paper is that due to Bogue, but other non-linear viscoelastic formulations could be used.