Figure 5.

(a) Pressure drop of multilayered polypropylene (PP)/polystyrene (PS) samples and neat components in an in-line slit rheometer; (b) nominal viscosity of multilayer samples and harmonic average (solid lines) of the neat components, as measured by steady shear experiments with a rotational parallel-disk rheometer; (c) interfacial slip velocities of multilayers; and (d) SEM micrographs of 320-layer PP/PS multilayer samples after steady shear. Reproduced with permission from Ref. [53]. Copyright (2009) AIP Publishing.