Effect of Reprocessing on the Rheological, Electrical, and Mechanical Properties of Polypropylene/Carbon Nanotube Composites

Schematic representation of the active cell for resistivity measurement

Melt shear viscosity curves for PP/MWCNT composites with 5 wt.%. (a) PP/MWCNT with 5 wt.% (R₀) and (b) PP/MWCNT with 5 wt.% (R₁).

Dependence of melt shear viscosity on temperature for an apparent shear rate of 1000 s⁻¹. (a) PP/MWCNT (R₀) and (b) PP/MWCNT (R₁).

Relationship between apparent shear viscosity and MWCNTs at 200 °C. (a) PP/MWCNT (R₀) and (b) PP/MWCNT (R₁).

Melt shear viscosity for: (a) virgin and (b) reprocessed PP/MWCNT composites. (a) PP/MWCNT with 5 wt.% (R₀) and (b) PP/MWCNT with 5 wt.% (R₁).

Comparison between resistivity of virgin and reprocessed PP/MWCNT composites

DC electrical conductivity as a function of MWCNT weight percentage

Stress–strain curves for reprocessed PP/MWCNT composite at 50 mm/min

Master curves for PP/MWCNT composites with: (a) 1 wt.% and (b) 5 wt.%

Stress–strain curves for PP/MWCNT composites with: (a) 1 wt.% and (b) 5 wt.% at 50 mm/min

Effect of reprocessing and MWCNT weight percentage on the mechanical properties of PP/MWCNT composites at 50 mm/min

Effect of variables on the mechanical properties of reprocessed PP/MWCNT composites

SEM image for PP/MWCNT with 1 wt.%: (a) powder from mechanical recycling and (b) injection-molded sample after first reprocessing cycle

SEM image for PP/MWCNT with 5 wt.%: (a) powder from mechanical recycling and (b) injection-molded sample after first reprocessing cycle

Resistivity of: (a) virgin and (b) reprocessed PP/MWCNT composites