Prediction of heat build-up behaviour under high load by use of conventional viscoelastic results in carbon black filled hydrogenated nitrile rubber

Abstract

Viscoelastic and heat build-up (HBU) properties of hydrogenated acrylonitrile butadiene rubber filled with various loadings and characteristics of carbon black were determined using RPA2000 and Gabometer 4000 flexometer equipped with high load cell respectively. A correlation of the viscoelastic results measured routinely with the HBU results is drawn. Reinforcement mechanism is proposed as an interplay of hydrodynamic effect, filler transient network, molecular slippage and cross-link density. In addition, the HBU significantly increases with increasing carbon black loading and/or surface area, which is probably the result of hysteretic process. As a prediction of HBU under high load, the loss modulus is superior to the damping factor. © 2011 Institute of Materials, Minerals and Mining.