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Y gamma = 0 for sigma = Y . ( 1 2 . 4 ) . ( 1 2 . 4 ) Problem
Ygamma for sigma Y
Problem
A CaCOfilled PP melt is found to obey the relationship given by Eq in
whichY is times Pa K is times Pa s and n at Ca Sketch the
viscosity versus shear rate curve. b Sketch velocity and shear stress distributions
in a long cylindrical tube through which this material is extruded. c What will the
pressure drop be when this material is extruded in a long flat film die cm wide,
cm thick, and cm long at a volumetric flow rate of cms at C
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