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Electric Modulus Spectroscopic Studies of the Dielectric Properties of Carbon Nanotubes/Epoxy Polymer Composite Materials |
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| Authors: | S Boukheir Z Samir R Belhimria L Kreit N Éber |
| Institution: | 1. Laboratoire LN2E, Faculté des Sciences, Université Cadi Ayyad, Marrakech, Morocco;2. Laboratoire LASTID, Faculté des Sciences, Université Ibn Tofail, Kénitra, Morocco;3. Laboratoire LASTID, Faculté des Sciences, Université Ibn Tofail, Kénitra, Morocco;4. Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences, Budapest, Hungary |
| Abstract: | The electrical properties of epoxy polymer/carbon nanotubes composites were characterized using impedance spectroscopy in the frequency range between 1 Hz and 10 MHz and temperature range between 25°C and 105°C. We report the analysis of the experimental data using the electric modulus formalisms to understand the dielectric relaxation mechanisms. The variation of the real and imaginary parts of the electric modulus versus frequency and temperature were suggestive of two relaxation processes, associated with dipolar relaxation and CNT-polymer interfaces. The Havriliak-Negami model of dielectric relaxation was used for modelling the relaxation processes, extracting the relaxation parameters. |
| Keywords: | Carbon nanotubes dielectric relaxation electric modulus electrical properties havriliak-negami model impedance spectroscopy |