Studies on the dielectric properties of olive pomace grains reinforced polymer matrix composites



Abstract. In this work, the polyester polymer matrix filled with olive-pomace grains was investigated by means of dielectric spectroscopy in the frequency range 10 KHz –1MHz and temperature from 300 K to 400 K. A numerical Kramers-Kronig transformation allowed the calculation of dielectric losses from the measured dielectric constant. The obtained relaxation processes were attributed to the orientation polarization imputed to the presence of polar water molecules in the pomace grains and to the accumulation of charges at the pomace grains/polyester interfaces. The analysis of the temperature dependence of the relaxation time using the Arrhenius equation shows the existence of two activation energies which are attributed to contributions of different relaxation processes.

Biocomposites, Dielectric Relaxation, Kramers-Kronig Relation

Published online 12/10/2016, 5 pages
Copyright © 2016 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: L. KREIT, Z. SAMIR, M.E. ACHOUR, A. OUERIAGLI, A. OUTZOURHIT, L.C. COSTA, M. MABROUKI, ‘Studies on the dielectric properties of olive pomace grains reinforced polymer matrix composites’, Materials Research Proceedings, Vol. 1, pp 238-242, 2016

The article was published as article 59 of the book Dielectric Materials and Applications

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