Experimental research on moulding of graphene/PEKK composite powder by spark plasma sintering technology

Polymer composite materials have good mechanical properties and resistance to heat, impact and corrosion. They have been widely used in aviation, aerospace, automotive, military and other fields. Choosing a suitable material moulding process is a key to improve the quality of polymer composite products. This study takes the in situ polymer graphene/polyether ketone ketone (PEKK) composite powder prepared in a laboratory as the research object and uses spark plasma sintering equipment to conduct powder moulding processing. After the graphene/PEKK composite powder is formed by spark plasma sintering, its electrical conductivity exceeds 0.164 S/m. The factors affecting moulding quality, including heating experience, heating time, force experience and force time affecting electrical conductivity, are experimentally analysed. The distribution of graphene in the matrix was observed using a scanning electron microscope to determine the influence of graphene distribution in the matrix on the electrical conductivity.