Abstract
Thermal stability, hydration and mechanical properties of thermally cross-linked Sulfonated Aromatic Polymers (SAP) with high ionic exchange capacity (IEC) were measured and compared to untreated samples. The formation of cross-linking greatly stabilizes SAP in terms of thermal, mechanical, and hydrolytic degradation: they can resist in water even at a temperature of 145 °C with improved mechanical properties. Acid-base titration and FTIR spectra consistently indicate that SAP microstructure stabilization is related to cross-linking of the polymer chains by SO2 bridges, which is promoted by temperature.
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Maranesi, B., Pasquini, L., Khadhraoui, M. et al. Proton-Conducting Cross-Linked Sulfonated Aromatic Polymers for Fuel Cells Application. MRS Online Proceedings Library 1384, 11 (2011). https://doi.org/10.1557/opl.2012.439
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DOI: https://doi.org/10.1557/opl.2012.439