Electrical and dielectric behaviors of dry-mixed CNT/UHMWPE nanocomposites

Carbon nanotube (CNT)/ultrahigh-molecular weight polyethylene (UHMWPE) nanocomposite with an electrical percolation threshold of only 0.1 wt% was prepared by simple dry mixing followed by compression molding. The nanocomposite microstructure, direct current and alternating current (AC) electrical co...

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Bibliographic Details
Published in:High performance polymers 2014-03, Vol.26 (2), p.205-211
Main Authors: Al-Saleh, Mohammed H., Jawad, Saadi Abdul, El Ghanem, Hasan M.
Format: Article
Language:English
Subjects:
Alternating current
Direct current
Frequency ranges
Microstructure
Nanocomposites
Nanostructure
Polyethylenes
Position (location)
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Summary:Carbon nanotube (CNT)/ultrahigh-molecular weight polyethylene (UHMWPE) nanocomposite with an electrical percolation threshold of only 0.1 wt% was prepared by simple dry mixing followed by compression molding. The nanocomposite microstructure, direct current and alternating current (AC) electrical conductivities, conduction mechanisms, and dielectric properties in the 101–105 Hz frequency range have been investigated. Due to the localization of the nanofiller at the surface of UHMWPE powder particles, a segregated microstructure within the polymer matrix was created. Nanocomposites filled with 0.125–0.5 wt% CNT were found to follow the typical universal dynamic response behavior, and the characteristic frequency was found to increase with the increase in CNT concentration. At CNT concentration ≥ 0.5 wt%, the AC conductivity was found to be frequency independent over the entire frequency range studied.
ISSN:0954-0083
1361-6412
DOI:10.1177/0954008313507590