Reinforced Ethylene Propyline Diene Terpolymer, EPDM, and Nitrile
Butadiene Rubber, NBR, were mixed with different concentrations of
asodicarbonamide, ADC/K, as a foaming agent to obtain EPDM and NBR
rubber foams. The investigated foams were subjected to electrical, A.C. and
D.C, measurements. Electrical conduction mechanisms were studied. Poole-
Frenkel and Schottky conduction mechanisms were detected. The dielectric
permittivity and loss were found sensitive to oscillating field. It was found that
the increase of foaming agent content affects markedly all the electrical
parameters.