Journal
CHEMICAL PHYSICS LETTERS
Volume 438, Issue 4-6, Pages 196-202Publisher
ELSEVIER
DOI: 10.1016/j.cplett.2007.02.076
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Four systems of conductive filler/polyvinylidene fluoride (PVDF) composites were prepared. Abnormal electrical behaviors as functions of temperature and microstructure were analyzed. Results show the carbon black (CB)/PVDF composites present a lower percolation threshold than other metallic filler/PVDF composites. The crystallinity of PVDF is diminished in the order of fillers, CB, Ni, Zn and W. The Ni/PVDF composites exhibit the maximum positive temperature coefficient intensity, whereas the transition temperature is independent of the kind of fillers. The non-uniform distribution of fillers is observed since they aggregate in amorphous regions of PVDF and form a network of conductive chains. (c) 2007 Elsevier B.V. All rights reserved.
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