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The conducting behavior and stability of conducting polymer composites
Author(s) -
Chen X. B.,
Issi JP.,
Devaux J.,
Billaud D.
Publication year - 1995
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760350802
Subject(s) - materials science , composite material , composite number , percolation threshold , polystyrene , polypyrrole , percolation (cognitive psychology) , electrical resistivity and conductivity , conductivity , polymer , percolation theory , annealing (glass) , polyethylene , thermal stability , epoxy , polymerization , chemical engineering , chemistry , engineering , neuroscience , electrical engineering , biology
Results of measurements of the electrical conductivity of low density polyethylene/polypyrrole and polystyrene/polypyrrole composites are reported. It is observed that the electrical conductivity of the composite vs. concentration follows the power law predicted by the percolation theory. The manufacturing process influences the homogeneity of the composite at microscopic scale and thus the percolation threshold. Annealing studies show that the stability of the electrical conductivity of the composite is related to the thermal expansion of the polymers and the relaxation of the polymer chains. The decrease of the electrical conductivity of the composite is attributed to the interruption of the percolation path.