Zero-shear viscosity worked examples

Problem 3.4(b) (Worked Example) Suppose you now mold a 1-cm-diameter spherical ball of 1,4-polyisoprene and place it on a flat surface at 25 °C and find that the time for it to sag to 90% of its original height is 10 minutes. Now you place the polyisoprene in a rheometer at 25°C to measure its viscosity, but the viscosity is too high to measure accurately, so you raise the temperature to lOO C and measure a zero-shear viscosity of 10 P. Use this information and that in Problem 3.4(a) to determine the viscosity of the gel in Problem 3.4(a), given that the gel density is = 3g/cm ... 

Problem 6.1 (Worked Example) Estimate the zero-shear viscosity of a suspension of hard spheres 100 nm in diameter at a volume fraction of [Pg.318]

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