A1 Journal article (refereed)
Evaluation of radiation stability of electron beam irradiated Nafion® and sulfonated poly(ether ether ketone) membranes (2022)

Pajuste, E., Reinholds, I., Vaivars, G., Antuzevičs, A., Avotiņa, L., Sprūģis, E., Rossi, M., Kettunen, H., Meri, R.M., & Kaparkalējs, R. (2022). Evaluation of radiation stability of electron beam irradiated Nafion® and sulfonated poly(ether ether ketone) membranes. Polymer Degradation and Stability, 200, Article 109970. https://doi.org/10.1016/j.polymdegradstab.2022.109970

JYU authors or editors

Publication details

All authors or editorsPajuste, E.; Reinholds, I.; Vaivars, G.; Antuzevičs, A.; Avotiņa, L.; Sprūģis, E.; Rossi, Mikko; Kettunen, Heikki; Meri, R.M.; Kaparkalējs, R.

Journal or seriesPolymer Degradation and Stability



Publication year2022

Publication date08/05/2022


Article number109970

PublisherElsevier Ltd.

Publication countryUnited Kingdom

Publication languageEnglish


Publication open accessOpenly available

Publication channel open accessPartially open access channel

Publication is parallel published (JYX)https://jyx.jyu.fi/handle/123456789/82532

Additional informationCorrigendum: Polymer Degradation and Stability. Volume 202, August 2022, 110008. https://doi.org/10.1016/j.polymdegradstab.2022.110008


Proton exchange membranes (PEM), which have been commonly used in fuel cells have raised interest for the application in harsh environments involving ionizing radiation. Therefore, radiation stability and ability to sustain their functionality under the radiation environment are of great interest. Within this study, electron beam irradiation in dose range from 50 to 500kGy was used to evaluate the effects of radiation on the physico-chemical and mechanical properties of two types of PEM: commercial Nafion®117 and sulfonated poly(ether-ether-ketone) (SPEEK) with high degree of sulfonation (DS = 0.75±0.5).

SPEEK membrane presented higher mechanical and thermal stability compared to that of Nafion® at doses up to 250 kGy, which was evidenced by infrared and electron paramagnetic resonance spectroscopy, thermal analysis, ion chromatography methods. Tensile tests at room temperature and dynamical mechanical analysis of irradiated membranes revealed improved strength, storage modulus at room and elevated temperatures (80°C) for irradiated SPEEK as compared to pristine PEM. For comparison Nafion® exhibited notable deterioration of mechanical properties including elongation at break due to the predominant oxidation and chain scission already at doses exceeding 50 kGy. The study indicated that SPEEK could be perspective replacement of traditional PEM for application in fuel cells exposed to ionising radiation.

Keywordsradiation physicsionising radiationfoils (films)polymersphysical properties

Free keywordsproton exchange membranes; electron beam; ionising radiation; degradation; crosslinking; thermomechanical properties

Contributing organizations

Ministry reportingYes

Reporting Year2022

JUFO rating1

Last updated on 2024-30-04 at 19:47