Abstract
Electric resistance of epoxy composite materials where thermally exfoliated graphite (TEG) with different dispersion degree and multi-walled carbon nanotubes (MWCNT) used as fillers has been investigated in the temperature range 77–300 K. The filler content was 5, 10 wt.%. It was shown that the behavior of the resistivity percolation curves of CMs depends on the structure of carbon fillers and becomes more linear with smaller size of particles (nanoTEG). The temperature dependences of electric resistance of CMs depend on the temperature changes of the electrical resistivity of carbon filler and contact resistance between filler particles and electroconductive network formed by fillers in CMs which change as a result of thermal expansion of composite.
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