Authors: Montgomery T. Shaw
Because of its simplicity, the Cox-Merz rule has been widely applied by practitioners to the prediction of melt viscosity of polymer melts under processing conditions. In this work, the applicability of the Cox-Merz rule to a stable and simple melt (PDMS) was tested in the near-Newtonian region. Evidence was found that it did not apply exactly, suggesting that its use at high shear rates could be highly misleading.
Keywords: PDMS, Cox-Merz rule