Polarization of LLDPE/HNT and HDPE/HNT blends in AC electric field

Abstract

Halloysite nanotubes (HNT) represent a type of aluminosilicate clay of natural origin with nanotubular structure. HNT have been started to use in many industrial fields, including the application in the electrical engineering. This paper is focused on the determination of dielectric properties of pure halloysite nanotubes, as well as, a polyethylene (LLDPE and HDPE) based HNT nanocomposite (blends). Individual samples in each series had contained different amount of HNT filler. The impact of the HNT content and the impact of the type of polyethylene on the dielectric properties were observed and evaluated. Measurements were carried out under the AC field via a broadband dielectric spectroscopy. Dielectric properties were evaluated through real and imaginary parts of the complex relative permittivity. Results are displayed as surface visualizations of frequency and temperature dependence. The relaxation times of selected relaxation processes were analyzed according to the theory of relaxation polarization.