Abstract
X-ray photoelectron spectroscopic measurements were made on complexes obtained from sulfonated polystyrene (SPS) and poly(styrene- co-4-vinylpyridine) (PSVP). The Nls spectrum of PSVP shows the existence of a single nitrogen environment. Two different nitrogen environments are discernible in the Nls spectra of the complexes, indicating that some of the pyridine units have been protonated. The S2p peak of SPS in the complex is shifted to a lower binding energy upon complexation with PSVP, indicating the existence of sulfonate ion. About 60% of the sulfonic acid groups in the complexes is ionized.
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