A continuous ramp at 25 C was applied and the apparent viscosity was measured as a function of shear rate over the 0.01e100 s1 range for 5 min. Two replicates of each flow curve were run with samples prepared on different days. All the curves were adjusted to the Ostwald model: h ¼ KY_ n 1
Where h is the apparent viscosity, K is the consistency index,gamma dot is the shear rate and n is the flow index.