Applied Microscopy

Korean Society of Microscopy (한국현미경학회)
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Investigations of Temperature Effect on the Conduction Mechanism of Electrical Conductivity of Copolymer/Carbon Black Composite

  • El Hasnaoui, M. (LASTID Laboratory, Physics Department, Faculty of Sciences, Ibn-Tofail University) ;
  • Kreit, L. (LASTID Laboratory, Physics Department, Faculty of Sciences, Ibn-Tofail University) ;
  • Costa, L.C. (I3N and Physics Department, University of Aveiro) ;
  • Achour, M.E. (LASTID Laboratory, Physics Department, Faculty of Sciences, Ibn-Tofail University)
  • Received : 2017.07.30
  • Accepted : 2017.08.11
  • Published : 2017.09.30
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Abstract

This study deals the prediction of temperature effect on low-frequency dispersion of alternating current (AC) conductivity spectra of composite materials based on copolymer reinforced with carbon black (CB) particles. A sample of ethylene butylacrylate loaded with 13% of CB particles were prepared and investigated using the impedance spectroscopy representation in the frequency range from 40 Hz to 0.1 MHz and temperature range from $20^{\circ}C$ to $125^{\circ}C$. The dielectric constant, ${\varepsilon}^{\prime}$, and dielectric losses, ${\varepsilon}^{{\prime}{\prime}}$, were found to decrease with increasing frequency. The frequency dependence of the AC conductivity follows the universal power law with a large deviation in the high frequency region, the positive temperature coefficient in resistivity effect has been observed below the melting temperature which makes this composite potentially remarkable for industrial applications.

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References

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