Effect of Processing Method on Mechanical Properties of PC/ABS-MWCNT Nanocomposites



Summary: Nanocomposites of commercial PC/ABS matrix filled with multi-walled carbon nanotubes (MWCNT) suspended in ethyl alcohol were compounded on twin-screw co-rotating extruder and subsequently injection molded varying injection speed and temperature. Optical microscopy (OM) and scanning electron microscopy (SEM) were used to characterize the morphology of nanocomposites. A presence of fine agglomerates of carbon nanotubes was observed. The elastic modulus and stress at yield point increased with MWCNT content for all nanocomposites. However, higher values of yield stress were obtained for lower injection velocities, due to more homogeneous dispersion at mild injection molding conditions.