Abstract
The morphology and ultimate properties of polymer blends depend on (1) polymer structure, (2) blend composition, (3) interfacial tension (which depends on structure and additives), (4) rheology, and (5) processing. Most polymer blends are immiscible giving rise to a coarse morphology, weak adhesion between phases, and in some cases poor mechanical properties. Rheology of immiscible polymer blends usually disobey the classical rules and needs to be studied with other theories specially designed for biphasic systems. Here, we discuss various theories developed over the years for immiscible polymer blends, especially dealing with the interfaces. Greatest challenge of the simple Palierne model in explaining the experimental results obtained for blends with special type of morphology can be dealt with the modified form developed.
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