5. The following table shows data from a flow study of a PS melt at 210°C in a capillary rheometer. a. Make a plot of log shear stress versus log shear rate. b. Calculate the value of the viscosity at 1 and 135 s', respectively. Shear Stress ,(10° dyn/cm') Shear Rate, 3.5 1.0 12.0 5.0 20.0 12.2 33.0 25.0 40.0 52.5 60.0 135.0 69.8 400.0

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