Dependence of electrical properties of polyethylene nanocomposites on aspect ratio of carbon nanotubes

Low density polyethylene nanocomposites filled with carbon nanotubes (CNT) having three different aspect ratios have been prepared by melt mixing technique. The effects of CNT loading, its aspect ratio, and frequency of electric field on electrical and dielectric properties of the nanocomposites hav...

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Bibliographic Details
Published in:Polymer composites 2013-04, Vol.34 (4), p.494-499
Main Authors: Rahaman, Mostafizur, Thomas, Selvin P., Hussein, Ibnelwaleed A., De, S.K.
Format: Article
Language:English
Subjects:
Alternating current
Applied sciences
Aspect ratio
Carbon nanotubes
Composites
Density
Dielectric constant
Electrical resistivity
Exact sciences and technology
Forms of application and semi-finished materials
Nanocomposites
Polyethylenes
Polymer industry, paints, wood
Technology of polymers
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Summary:Low density polyethylene nanocomposites filled with carbon nanotubes (CNT) having three different aspect ratios have been prepared by melt mixing technique. The effects of CNT loading, its aspect ratio, and frequency of electric field on electrical and dielectric properties of the nanocomposites have been investigated. DC and AC electrical resistivity are found to decrease with the increase in CNT loading in the composites, while the dielectric constant and loss increase with the increase in CNT loading in the composites. AC electrical resistivity, dielectric constant, and dielectric loss decrease with the increase in frequency. Furthermore, the electrical resistivity decreases with the increase in aspect ratio of CNT, whereas the dielectric constant and loss increase with the increase in aspect ratio of CNT. While probable mechanisms for electrical conduction have been proposed, dielectric results have been explained by considering CNT as nanocapacitors. POLYM. COMPOS., 2013. © 2013 Society of Plastics Engineers
ISSN:0272-8397
1548-0569
DOI:10.1002/pc.22447