Measurement of Dielectric Properties of Low-Density Polyethylene Nanocomposites Using “Sub-Hertz” Dielectric Spectroscopy
Abstract: Recently, many
studies have been conducted on the dielectric properties of Low-Density Polyethylene
(LDPE) nanocomposites and produced different results. However, the composition
of LDPEpolymer and boron nitride (BN) as nanofiller has neither been well
understood nor producing a convenient result. Similarly, the dielectric
spectroscopy measured at “sub–hertz” frequency has been of little interest among
researchers since it is often influenced by “conduction-like” effect. This
research identified the dielectric properties of LDPE nanocomposites filled
with hexagonal boron nitride (h-BN) nanofillers byusing dielectric spectroscopy
technique. The dielectric loss and relative permittivity for three different
filler concentrations were investigated under “sub-hertz” frequency ranges at
room temperature. The cylindrical electrode with guard ring configuration was
used to conduct the experiment, in accordance to the ASTM D150 standard. The
results revealed that 5 wt% filled polymer has lower loss tangent and
permittivity compared to the unfilled polymer, due to the strong interaction
between nano-particle and the polymer. This strong interaction is believed to
limit the movement of the polymer chain. The decrease in loss tangent also
indicates lower quasi-DC at low frequency. However, further increase in the
filler loading has recorded an increment in the value of permittivity and loss
tangent. This higher effective permittivity is mainly due to the influence of
the filler permittivity
Keywords: permittivity,
tangent delta, low density polyethylene (LDPE), boron nitride (BN) nanofillers,
dielectric spectroscopy
Author: Mohammad Syamim
Mohammad Basri, Lailatul Akmal Abdul Rauf, Mohd Hafizi Ahmad
Journal Code: jptkomputergg170056
