Abstract
The influence of solvent uptake (%) on the electrical resistivity S of ethylene propylene diene monomer rubber (EPDM)/acrylonitrile butadiene rubber (NBR) blends filled with different concentrations of high abrasion furnace carbon black has been studied. The effects of the EPDM/NBR weight ratio and carbon black content on the room temperature resistivity of the composites were elucidated in detail. The performance of these sensors depends on a number of parameters, including the geometry and concentration of the conductive component dispersed in the polymer. Direct current current–voltage I–V characteristics of the filled rubber blends were studied at room temperature. The current–voltage relationship can be expressed as I = AVB, where A and B are constants that show capability and property of electrical conduction respectively. The I–V curve can be divided into ohmic and non-ohmic regions. A number of important parameters, namely, Schottky and Poole–Frenkel effects, have been determined.
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