Abstract
The relationship between morphology and resistivity–temperature behavior of carbon black (CB) filled isotactic polypropylene/high density polyethylene (iPP/HDPE) composites was investigated. The positive temperature coefficient intensity for all composites studied in this paper was lower than one and the negative temperature coefficient (NTC) effect was obvious. The factors influencing resistivity–temperature behavior include the CB contents, types of the polymer matrices and their composition, which determine the phase morphology and thus the conductive network. The types of iPP and HDPE influenced the NTC effect, while the morphology of the composites mainly influenced the initial volume resistivity of the composites.
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