Factors affecting electrical conductivity of carbon black-loaded rubber. I. Effect of milling conditions and thermal-oxidative aging on electrical conductivity of haf carbon black-loaded styrene–butadiene rubber

Styrene–butadiene rubber (SBR-1502) loaded with 50 phr carbon black (HAF) was prepared. The electrical conductivity of rubber vulcanizates was measured. It was found that milling conditions have a marked effect on the temperature dependence of the electrical conductivity σ(T) of test samples. In this case, the resistivity of prepared samples increases with remilling and has a minimum value on the σ(T) curve. Thermal-oxidative aging of such vulcanizates decreases the conductivity of the prepared samples.