Structural characterization and electrical properties of carbon nanotubes/epoxy polymer composites |
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| Authors: | Sofia Boukheir Adél Len János Füzi Viktor Kenderesi Mohammed Essaid Achour Nándor Éber Luis Cadillon Costa Amane Oueriagli Abdelkader Outzourhit |
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| Affiliation: | 1. Physics Department, Faculté des Sciences, Laboratoire LPSCM, Marrakech, Morocco;2. Physics Department, Laboratoire LASTID, Faculté des Sciences, Université Ibn Tofail, Kénitra, Morocco;3. Complex Fluids Department and Neutron Spectroscopy Department, Institute for Solid State Physics and Optics Wigner Research Centre for Physics Hungarian Academy of Sciences, Budapest, Hungary;4. Civil Engineering Department and Automation Department, Faculty of Engineering and Information Technology, University of Pécs, Pécs, Hungary;5. I3N and Physics Department, University of Aveiro, Aveiro, Portugal |
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| Abstract: | The purpose of this study is to identify the relationship between the electrical and structural characteristics of multiwalled carbon nanotubes dispersed into the polymer matrix of a resin. In a first step, the composites were characterized by small‐angle neutron scattering, which provide information about the bulk dispersion of nanotubes in the matrix and form three‐dimensional networks with a surface fractal behavior. In the second step, a dielectric and electrical study was carried out in the frequency range between 1 Hz and 10 MHz at room temperature. We have found that the electric and dielectric behavior of these composites can be described by Jonscher's universal dielectric response. We show that the critical exponents describing the concentration dependence of the conductivity and the dielectric constant, obtained in the vicinity of the percolation threshold, are in good agreement with the theoretical values. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134, 44514. |
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| Keywords: | electrical properties fractal structure impedance spectroscopy percolation small angle neutron scattering |
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