The above observation suggests that this particular PP/EOC TPVs do
not follow the Cox–Merz model. It may be mainly due to the principle
of operation of different experiments. In the oscillatory flow,
the dispersed phase only oscillate in certain amplitude range without
deforming the dispersed phase, because the selected strain (5%
strain amplitude) is in the linear viscoelastic region and very low to
disturb the dispersed phase. Although in case of TPVs, the crosslinked
rubber particles undergo less deformation and quick recovery.
But in capillary shear flow, the crosslinked EOC phase deform
in the direction of shear flow. Hence the flow behavior is determined
by both the viscous flow (flow characteristics of PP) and
recoverable elastic deformation (degree of crossliking in EOC
phase). In other words, it can be resolved that in oscillatory shear
flow the shear deformation is comparatively lower than that of
the steady shear flow.