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Influence of Temperature and Humidity on the Mechanical Properties of Nafion® 117 Polymer Electrolyte Membrane


Bauer, Felix ; Denneler, Stefan ; Willert-Porada, Monika:
Influence of Temperature and Humidity on the Mechanical Properties of Nafion® 117 Polymer Electrolyte Membrane.
In: Journal of Polymer Science Part B: Polymer Physics. Bd. 43 (2005) Heft 7 . - S. 786-795.
ISSN 1099-0488
DOI: https://doi.org/10.1002/polb.20367


Link zum Volltext (externe URL): Volltext


The dynamic mechanical properties of Nafion 117 have been measured in-plane parallel and perpendicular to the lamination direction in a specially designed humidity cell, which allows measurement of the stiffness and mechanic loss under fuel cell relevant temperature and humidity conditions (50-100% relative humidity, 30-120 °C). The results obtained at different temperature--humidity conditions are compared with the mechanical behavior of the dry as well as the membrane saturated with liquid water. Different regimes of change in mechanical properties were found, although in general water acts as a plasticizer in Nafion. At elevated temperatures it stiffens the membrane by stabilizing the network of hydrophilic clusters. An intermediate increase of mechanical strength at very low humidity levels is attributed to an enforcement by formation of hydrates and hydrogen bridge bonds between vicinal sulfonic acid groups. This increase is significant for the protonated state of the membrane and disappears after ion exchange. © 2005 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 43: 786-795, 2005

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Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Keywords: Nafion; dynamic mechanical analysis; Fuel cell; glass transition; ionomers; Mechanical properties
Institutionen der Universität: Fakultäten > Fakultät für Ingenieurwissenschaften > Ehemalige Professoren > Lehrstuhl Werkstoffverarbeitung - Univ.-Prof. Dr. Monika Willert-Porada
Profilfelder > Advanced Fields > Polymer- und Kolloidforschung
Fakultäten > Fakultät für Ingenieurwissenschaften
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Werkstoffverarbeitung
Profilfelder > Advanced Fields
Fakultäten > Fakultät für Ingenieurwissenschaften > Ehemalige Professoren
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 500 Naturwissenschaften
600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Eingestellt am: 04 Mai 2015 12:27
Letzte Änderung: 04 Mai 2015 12:27
URI: https://eref.uni-bayreuth.de/id/eprint/11239