Summary
The constant deformation fatigue test was found to affect the electrical properties of 70 FEF/SBR vulcanizates. The conductivity of 70 FEF/SBR sample is so sensitive to the value of strain amplitude and the number of cycles. When the specimens were subjected to a large number of rapidly repeating strain cycles, the transverse conductivity, σT, shows an initial rapid fall with increasing number of cycles, probably due to carbon structure breakdown. This is followed by dynamic equilibrium, where the conductivity remains almost constant over the temperature range 30–85 °C.
The equilibrium state between destruction and reconstruction of carbon black aggregates has been detected for all strains of certain values of strain cycles (1.2 × l05, 4.7 × 104, 4.7 × 104, and 1.7 × 104 cycles for 50%, 75%, 100%, and 130% strains, respectively).
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Amin, M., Nasr, G.M., Hassan, H.H. et al. Investigation on the dependence of the electrical conductivity of FEF/SBR vulcanizates on the cyclic strain. Polymer Bulletin 22, 413–420 (1989). https://doi.org/10.1007/BF00263081
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DOI: https://doi.org/10.1007/BF00263081