Nanocomposites of high density
polyethylene (HDPE) reinforced with
hybrid fillers of polyaniline coated
multiwalled carbon nanotube (MWNT), and
carbon black (CB) were developed aiming
at enhancing the electrical conductivity of
the composites. The electrical properties such
as volume resistivity, impedance, and
conductance have been measured as a
function of filler volume concentration (%),
frequency and voltage. The electrical
property such as volume resistivity depends
on the concentration of fillers. This is due to
the formation of a continuous conducting
network throughout the polymer matrix with
increase in the conducting filler. This kind of
variation is referred as Maxwell-Wagner
effect. The resistance of the prepared
PANI/c-MWNT/CB/HDPE nanocomposites
is found to be ohmic. It was shown that
adding CB in PANI/c-MWCNTs
composites can enhance the electrical
properties of the nanocomposites: a low
percolation threshold was achieved with 0.25
wt% CNTs and 20 wt% of CB/HDPE. CB
enhanced the ductility of the nanocomposites,
confirming the synergic effect of CB as
effective multi-functional filler.
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