Abstract
Two experimental devices have been developed to optimize conductive polymer composite (CPC) formulation. CPCs are used for self-regulated heating applications and thus it is important to determine both their electrical and thermal properties as a function of temperature. Electrical conductivity was determined from extruded tapes for two diphasic thermoplastic CPCs rather different in structure and nature: poly(butylene terephthalate)/poly(ethylene-co-ethyl acrylate)-carbon black and poly(butylene terephthalate)/poly(amide12-b-tetramethyleneglycol)-carbon black. In one case heat is provided by an oven whereas in the second it is self-generated by the CPC, this latter technique allowing thermal conductivity measurement. Although different in principle, the two techniques gave conductivity values in good agreement and the self-regulation effect was evidenced.
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