Rheology of compatibilized immiscible viscoelastic polymer blends

Rheological behavior of a PS/PE model viscoelastic immiscible blend compati bilized by two types of interfacial modifiers was investigated. Dynamic, st eady shear, and transient experiments were performed to probe the effect of the interfacial modification on the rheological behavior of the blend. Whi le the effect was relatively small in dynamic and steady shear experiments, significant signature of the presence of the copolymer was observed in tra nsient experiments after start up of shear flow. The magnitude of the departure from Doi-Otha theory (worked out for non-com patibilized blends) was valuated.