Phase Continuity in IPNs

IPN s have two continuous networks. In the case of latex IPN s, each particle ideally is composed of two network molecules. In bulk-prepared materials, the two networks are often presumed to be continuous on a 

This chapter concerns a diverse group of polymeric blends whose constituents may be either compatible or incompatible with each other. While the blends discussed in Chapter 3 are of interest because of their high impact strengths, the materials covered in this chapter are of interest because of a variety of other physical properties. 

a series of incompatible systems is discussed, including blends of different elastomers, two-component fibers and films, blends having paperlike characteristics, two-component membranes having highly ordered structures, and wood. Next, some aspects of the flow behavior of blends are considered, with emphasis on the effects of flow on morphology. Finally, the behavior of compatible blends, including isomorphic composition, is described. 

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This review will examine the morphological features of sequential IPN s, starting with transmission electron microscopy (TEM) and modulus, and continuing on with SAXS, and SANS. Dual phase continuity in IPN s will be explored, with emphasis placed on splnodal decomposition in IPN systems. 

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