Blends of acrylonitrile butadiene/ethylene-propylene diene monomer (NBR/EPDM) loaded with different ratios of N-326(HAF)/N-774(SRF) carbon black fillers were prepared. The effects of both blends and N-326/N-774 black ratios on the electrical resistivity were studied. The changes of the electrical resistivity of 50NBR/50EPDM rubber blend during compression were investigated. Based on the shell structure theory, the experimental results were explained from the view that external pressure induces the creation and annihilation of effective conductive paths, leading to the changes in the resistivity of blends.
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