Abstract
AbstractIn this study we are interested in the effect of concentration and temperature on the electrical resistivity of butyl rubber (IIR) loaded with two types of carbon black, (namely, high abrasion furnace black (HAF), and fast extrusion furnace black (FEF)). It was found that the conductivity at low carbon black concentrations is mainly achieved by thermal activation of carriers. Tunneling mechanism at low termperature followed by thermal activation at relatively high temperature is found to be predominant for moderate concentrations for both carbon blacks. The metal‐like behaviour which was observed in highly loaded compounds was attributed to both, the thermal expansion of the tunneling paths between carbon‐carbon agglomerates and the breakdown of carbon agglomerates with temperature.
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