High ionic exchange capacity polyphenylsulfone (SPPSU) and polyethersulfone (SPES) cross-linked by annealing treatment: Thermal stability, hydration level and mechanical properties

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 sulfonated polyphenylsulfone (SPPSU) in terms...

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Bibliographic Details
Published inJournal of membrane science Vol. 354; no. 1; pp. 134 - 141
Main Authors Di Vona, M.L., Sgreccia, E., Tamilvanan, M., Khadhraoui, M., Chassigneux, C., Knauth, P.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.05.2010
Subjects
Aromatic polymer
PEM fuel cells
Polymer electrolyte
Swelling
Water uptake
Water uptake
Polymer electrolyte
PEM fuel cells
Swelling
Aromatic polymer
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Summary: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 sulfonated polyphenylsulfone (SPPSU) in terms of thermal, mechanical, and hydrolytic degradation: it can resist in water even at a temperature of 145 °C with improved mechanical properties, while TGA experiments demonstrate that SPPSU membranes are stable well above 200 °C. Sulfonated polyethersulfone (SPES) membranes show, instead, a hydrolytic instability.
ISSN:0376-7388
1873-3123
DOI:10.1016/j.memsci.2010.02.058