Effects of thermal process conditions on crystallinity and mechanical properties in material extrusion additive manufacturing of discontinuous carbon fibre reinforced polyphenylene sulphide composites

This study investigates the thermal behaviour of discontinuous carbon fibre reinforced polyphenylene sulphide (CF/PPS), additively manufactured by material extrusion, with a focus on effects process conditions degree crystallinity, oxidation crosslinking and mechanical properties CF/PPS from filament fabrication, extrusion to annealing treatment. The screw parameters are optimised performing analysis fabricated filaments. effect reactions crystallinity in determining printed samples is illustrated investigating influence printing conditions. Furthermore, treatment semi-crystalline (PPS) studied measuring viscoelasticity behaviours. Results demonstrate that flexural composites at elevated processing temperatures determined between PPS chains. These enhance crystallisation polymers acting as nucleating agent first but negatively affect higher because detrimental polymer inter-chain bonding. maximum strength reached 164.65 MPa when an temperature 280°C, 320°C, 130°C for 6 h. By adjusting conditions, can be designed, controlled tailored.