Abstract
Low-density polyethylene (LDPE)/ZnO composites were prepared using melt mixing process. ZnO powder with size of 44 nm was used as reinforcing particle. The electron beam irradiation effects on the dielectric behaviour of a polymer nanocomposite dielectric made of low density polyethylene filled with nanoparticles of ZnO were studied. The dielectric constant and dielectric loss values were determined by dielectric spectroscopy over a frequency range of 100 KHz–5 MHz on plane samples of the tested nanodielectrics. The influence of filler concentration, between 2 and 8 wt.%, and the irradiation effects on the dielectric properties are also discussed in the paper.
Highlights
The blending of polymer and inorganic fillers is an adaptable method to prepare composites with enhanced performances
The dielectric constant and dielectric loss values were determined by dielectric spectroscopy (DS) over a frequency range of 100 KHz–5 MHz before and after irradiation
The influence of the filler content (Figure 6 SEM images of nano-ZnO-low-density polyethylene (LDPE) composites showing uniform distribution of particles) on the real part and the complex relative permittivity of the irradiated and unirradiated samples is depicted in Figures 7 and 8
Summary
The blending of polymer and inorganic fillers is an adaptable method to prepare composites with enhanced performances. The electrical properties of this insulating polymer can be altered by adding conductive particles such as carbon nanotube [1,2,3], metallic filler [4, 5], and ZnO [6]. The low-density polyethylene (LDPE) is one of the best polymer matrices because it is a thermoplastic widely used for electrical industry sector [8]. The ZnO nanoparticles have conductivity much higher than LDPE, so the dielectric properties and conductivities of LDPE/ZnO composites are expected to alter with the ZnO additions. The nanophase in LDPE under electron beam irradiation provides new information on the changes in dielectric properties. The influence of the electron beam irradiation on the dielectric behaviour of low-density polyethylene (LDPE) filled with nanoparticles of ZnO is analysed. The dielectric constant and dielectric loss values were determined by dielectric spectroscopy (DS) over a frequency range of 100 KHz–5 MHz before and after irradiation
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