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Anisotropy of electrical conductivity and structure in polymer‐carbon fiber composite materials
Author(s) -
Nascimento J. Fernandes,
Ezquerra T. A.,
BaltàCalleja F. J.,
Seferis J. C.
Publication year - 1995
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.750160202
Subject(s) - materials science , composite material , anisotropy , electrical resistivity and conductivity , conductivity , microstructure , composite number , fiber , polyimide , perpendicular , thermal conduction , electrode , optics , layer (electronics) , geometry , engineering , chemistry , physics , electrical engineering , mathematics
Electrical conductivity for polyether and polyimide‐carbon fiber composites was measured using different fiber types. The microstructure was characterized by X‐ray diffraction methods. D.C. conductivity measurements were carried out in directions perpendicular, parallel, and at varying angles to the fiber axis. The influence of the distance between electrodes on the conductivity was examined. The dependence of the frequency and the temperature upon conductivity has been, likewise, investigated. Experimental results support the concept of a conduction mechanism in the composites occurring in the carbon fibers, which built up a highly interconnected conducting network. It is also shown that the high degree of fiber orientation is consistent with the conspicuous anisotropic behavior of the electrical conductivity.