| This research investigated four different properties (tensile modulus, torsional modulus, stiffness using a cantilever beam and complex melt viscosity) of blending systems of metallocene((m24, 24g/10min),(m34,34g/10min))-Zeigler Natta (z20,20g/10min) type polypropylenes of different melt flow rates. Various weight combinations were injection molded and then tested to identify the optimum combination exhibiting the best then-nomechanical properties according to ASTM protocols.; All blends containing z 20 and m 34, and the control resins, except the 25/75(m34+ z 20) exhibited a high tensile modulus.; Higher stiffness, using a cantilever beam, was recorded for z 20 and m 34 control and also for the blends containing z 20 and m 34.; The complex melt viscosity decreased with an increase in frequency. The m 24 and m 34 controls exhibited lower viscosity than all the blends and z 20.; All blends exhibited torsional modulus greater than 1E8 MPa up to 100°C. |
