Electrical and dielectric behaviors of dry-mixed CNT/UHMWPE nanocomposites. (March 2014)

• Record Type: Journal Article
• Authors: Al-Saleh, Mohammed H.; Jawad, Saadi Abdul; El Ghanem, Hasan M.
• Is Part Of: High performance polymers. Volume 26:Number 2(2014:Mar.)
• Page Start: 205
• Page End: 211
• Publication Date: 2014-03
• Subjects: Electrical percolation threshold -- impedance analysis -- DC conductivity -- polymer nanocomposite -- CNT -- UHMWPE; Polymerization -- Periodicals; Polymers -- Periodicals; 547.7
• DOI: 10.1177/0954008313507590
• Languages: English
• ISSNs: 0954-0083

Abstract

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 10 1 –10 5 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.