Evaluating Non-linear Viscoelastic Effects Using Normal Force Measurements on a Rotational Rheometer
Application Note Apr 28, 2015
Malvern Instruments Limited
The non-linear viscoelastic behavior of a non-Newtonian material can be determined by measuring the normal force as a function of shear rate shear rate using a cone-plate measuring system. The first normal stress difference and first normal stress coefficient which are equivalent to the shear stress and shear viscosity respectively can also be calculated.