Abstract
Synchrotron SAXS was used to characterize the morphology of an amorphous ionomer-compatibilized polyester/polyamide blend. This technique was shown to provide very useful information regarding the size of the dispersed domains, the structure of the phase-separated morphology, and the thickness of the blend interface. Two blend series that were investigated include a binary system (polyamide/ionomer) with varying ion contents of the polyester ionomer and a ternary blend (polyamide/polyester/ionomer) with increased loading of an ionomer compatibilizer. The incorporation of ionic functionality, by varying either ion content or ionomer loading, has a significant impact on the sizes of the dispersed domains with both blend systems showing a trend toward smaller domain sizes with an increase in the concentration of ionic functionality. In addition, the 50/50 blend series indicates that the ionic incorporation also leads to a shift in the morphology to a more elongated, cocontinuous structure. While the ionic fu...
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