Quiz Lab 1
Melt Viscosity
1) Sketch a plot of log viscosity versus log shear rate for a polymer melt.
2) Indicate the power-law fluid regime and the location of the extrapolated zero shear rate viscosity.
3) Sketch a plot of log of the zero shear rate viscosity versus log of the molecular weight for a typical series of polymers.
4) Indicate the entanglement molecular weight on this plot and the two regimes of power-law scaling.
5) Sketch a plot of log viscosity versus 1/T (with T in Kelvin).
6) What does this plot indicate about viscosity?