Abstract
Infrared spectroscopy is being applied to gain new insights into structural properties of fuel cell membrane materials and to aid in determinations of membrane water content. In the area of structure elucidation, two-dimensional (2D) correlation methods are being adapted in the analysis of spectral data sets collected during water uptake into fluorinated ionomer materials. Synchronous 2D correlation plots assist in the resolution of spectral regions complicated by overlapping bands and indicate distinctions in transformations centered within hydrophilic relative to more hydrophobic ionomer domains. Asynchronous 2D correlation plots reveal relationships in the dynamics of side chain and backbone motions that accompany changes in membrane hydration state.
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