Journal
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
Volume 43, Issue 23, Pages 3413-3420Publisher
WILEY
DOI: 10.1002/polb.20648
Keywords
blends; electron microscopy; interfaces; SAXS; SEM; solid-state shear pulverization
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Studies of immiscible blend compatibilization often involve laborious microscopy methods to characterize changes in the particle size distribution with time in the melt. Here we explore a simple alternative approach based on Porod scattering from the two-phase structure. Although micron-sized particles in immiscible polymer blends are too large to be fully characterized by small-angle scattering, Porod scattering measurements of the interfacial area combined with knowledge of the blend volume fraction allows determination of an average particle diameter from a single scattering measurement. This technique is illustrated in experiments monitoring coarsening of particle size in polystyrene/poly(methyl methacrylate) blends prepared either by melt blending or solid-state shear pulverization. (c) 2005 Wiley Periodicals, Inc.
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