In the present research the rheological properties of polymer melt composed of (polypropylene- polycarbonate ) unfilled_ filled with different amounts of Iraqi carbon black (2 – 7) wt% was studied. Single screw extruder was used for development of these blends . The rheological behaviour of these blends was investigated by using rotational concentric type rheometer .
The rheological properties shear rate( ( , apparent viscosity (a), dynamic viscosity(ή ), shear stress (τ) and angular frequency (ω),shearing flow at various temperatures ( 220 ˚C, 240˚C and 260 ˚C) were studied and found to be increase with increasing the amount of filler and decrease with increasing temperature. The flow curves were determined in the range of shear rate from about (10 to10 2 ) s-1. The activation energy was also measured, the values of activation energy varied from(11.939 to 20.892) KJ/Mole for different formation.