This research work aimed at developing, by twinscrew extrusion process, electrically conductive sheets for proton exchange membrane fuel cell (PEMFC) bipolar plates. For this, a series of highly conductive blends were carefully formulated from a co-continuous mixture of polythylene terephthalate (PET)/polyvinylidene fluoride (PVDF) and high specific surface area carbon black (CB) and graphite (GR) conductive additives. Several major factors, such as CB/GR content, PVDF/PET composition and morphology, and also PET crystallinity were shown to have remarkable effects on these three main properties.

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