Abstract
Polymer properties can be experimentally tailored by adding small amounts of different fillers, but they are expensive with respect to the classical polymer materials. This paper has been studied the enhancement and controlling of electric and dielectric properties of low-density polyethylene (LDPE) polymer materials by cost-fewer nanoparticles. Certain percentages of clay and fumed silica nanoparticles have been enhanced electric and dielectric properties of low-density polyethylene nanocomposite. Dielectric spectroscopy has been measured the electric and dielectric properties of low-density polyethylene with and without nanofillers at various frequencies (10Hz-100kHz) and temperatures (20°C, 40°C and 60°C). Also, it has been investigated the optimum percentages of nanofillers with respect to nanofillers type, filler concentration and temperature for enhancing electric and dielectric characterization of low-density polyethylene. Experimental measurements have been carried out on dielectric breakdown strength of new polyethylene nanocomposites materials under variant electric fields (uniform, and non-uniform) and variant temperatures. It has been specified the effective nanofillers factors on dielectric breakdown strength of polyethylene nanocomposites materials.
Highlights
Polymer nanocomposites have attracted wide interest with regard to enhancing polymer properties and extending their utility in recent years
The nanocomposite material which the nanofillers are evenly distributed in the polymer material attracts attention as an insulating material because the properties of the original material can be drastically improved by adding a few percent of nanofillers
The distribution of nanoparticles within the polymer matrix has been detected by using scanning electron microscope (SEM) as shown in Fig. 1, that illustrates Clay/Low-density polyethylene (LDPE) nanocomposites and Fumed silica/LDPE nanocomposites illustrate penetration of nanoparticles inside low-density polyethylene
Summary
Polymer nanocomposites have attracted wide interest with regard to enhancing polymer properties and extending their utility in recent years. The nanocomposite material which the nanofillers are evenly distributed in the polymer material attracts attention as an insulating material because the properties of the original material can be drastically improved by adding a few percent of nanofillers. Electrical insulating polymers are usually modified with inorganic fillers to improve electrical, mechanical, thermal properties. Inorganic fillers are dispersed non-uniformly in the polymer matrix, and the irregular interfaces are usually electrically weak spots. It is well known that electrical properties of insulating polymer composites depend strongly on their microstructures. The size and shape of the fillers, the dispersion of the fillers, the filler-filler, filler-matrix interactions including interfacial strain, directly affect the electrical properties of composites [1], [2], [3], [4], [5], [6], [7], [8], [9], [10], [11]
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