Polymer Rheology

Calculate the flow rate of a polymer melt through a circular die of a capillary rheometer with a right angle entry when the recorded pressure is 25MPa, knowing that the flow rate through the same die at a pressure of 100MPa is 0.392cm3s1 (at the same temperature). State what assumptions are made and what additional information would be required to increase the confidence in the calculated flow rate. Data available Die: diameter =2mm; Die length =100mm Polymer melt: Consistency index =63.1kPas0.33 Power law index =0.33