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

被引：39
作者：
Al-Saleh, Mohammed H. [1 ]
Jawad, Saadi Abdul [2 ]
El Ghanem, Hasan M. [3 ]
机构：
[1] Jordan Univ Sci & Technol, Dept Chem Engn, Irbid 22110, Jordan
[2] Hashemite Univ, Dept Phys, Zarqa, Jordan
[3] Jordan Univ Sci & Technol, Dept Phys, Irbid 22110, Jordan
来源：
HIGH PERFORMANCE POLYMERS | 2014年 / 26卷 / 02期
关键词：
CNT; DC conductivity; UHMWPE; Electrical percolation threshold; impedance analysis; polymer nanocomposite; MOLECULAR-WEIGHT POLYETHYLENE; NANOTUBE-POLYMER COMPOSITES; IN-SITU POLYMERIZATION; CARBON NANOTUBES; MECHANICAL-PROPERTIES; ALTERNATING-CURRENT; CNT/ABS NANOCOMPOSITES; PERCOLATION-THRESHOLD; AC CONDUCTIVITY; DISPERSION;
D O I：
10.1177/0954008313507590
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
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.
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页码：205 / 211
页数：7
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