Abstract
The effect of different doses of 60Co gamma rays on the electrical conductivity of 100 FEF/SBR samples loaded with different concentrations of sulphur has been studied. It was found that samples containing 1.0 and 1.5 phr of sulphur show a remarkable increase in their electrical conductivity upon irradiation while those that contained 0.5 and 5 phr of sulphur have anomalous behaviour in electrical conductivity γ-dose dependence. The degradation by irradiation takes place for samples containing 0.5 and 5 phr of sulphur at around 8 and 30 kGray, respectively. The variation of the conduction mechanisms through these composites upon irradiation was also discussed.
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