Conductive behavior of composites composed of carbon black-filled ethylene-tetrafluoroethylene copolymer
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Over the past two decades, conductive polymer composites have been widely applied in the areas of electromagnetic/radio-frequency interference shielding, electrostatic discharge, conductive adhesives for die attachment in electronic packaging applications, and electroactive polymeric sensors in hand prostheses [1, 2], because of their unique electrical and mechanical properties, such as light weight, low cost, ease of processing, and corrosion resistance, in comparison with metals .
Conductive polymer composites exhibit some interesting features involving variations of resistivity with temperature [4, 5], mechanical stress [6, 7] or chemical environments [8, 9, 10, 11]. Conductive composites based on semicrystalline polymer show positive temperature coefficient (PTC) effect of resistivity around its melting point, which is quite attractive for the thermo-sensitive sensor applications. The PTC effect greatly depends on the properties of the matrix and the filler as well as on the...
KeywordsNegative Temperature Coefficient Dibutyl Phthalate Positive Temperature Coefficient Percolation Transition Conductive Polymer Composite
This research was supported by the National Basic Research Program of China (No. 2005CB623800) and Specialized Research Fund for the Doctoral Program of Higher Education (No. 20040335077).