Temperature Influence on Dielectric Response of LDPE-TiO2 Nanocomposite

Abstract

The influence of the temperature variation on the dielectric behavior of low density polyethylene (LDPE) - TiO2 nanocomposite was studied in this work. The dielectric spectra of the real and imaginary parts of the complex permittivity were measured for unfilled LDPE and nanodielectric samples, in the range 10-2–106 Hz and at temperatures between 300 K and 350 K. Three main loss peaks, found to dominate the spectrum of the imaginary permittivity of the nanodielectric, and emphasizing three relaxation processes, were analyzed using a Havriliak-Negami (HN) model. The temperature influence on these relaxations and the activation energies for the processes involved are also discussed in the paper.