Stress relaxation behavior of EPDM seals in polymer electrolyte membrane fuel cell environment

• Published in: International journal of hydrogen energy Vol. 37; no. 18; pp. 13478 - 13483
• Main Authors: Cui, Tong, Chao, Y.J., Van Zee, J.W.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.09.2012; Elsevier
• Subjects: Alternative fuels. Production and utilization; Applied sciences; Electrolytes; Energy; EPDM; Exact sciences and technology; Fuels; Hydrogen; Service life estimation; Stress relaxation; Time temperature superposition; Stress relaxation; Service life estimation; EPDM; Time temperature superposition; Polymer electrolytes; Hydrogen; Ethylene; Temperature effect; Membrane; Seal; Fuel cell
• ISSN: 0360-3199; 1879-3487
• DOI: 10.1016/j.ijhydene.2012.06.098

Polymer electrolyte membrane fuel cell (PEMFC) is a promising power source. Sealing around the perimeter of the cell is required to prevent the gases/liquids inside the cell from leaking. Polymers are usually used as the seal or gasket materials. The viscoelastic property of polymers can induce stress relaxation of the seal under constant strain. The stress relaxation behavior of ethylene propylene diene monomer (EPDM) rubber, a potential candidate seal in PEMFC, is studied in this paper. The effect of temperature, applied strain, and environmental exposure on stress relaxation behavior of EPDM is investigated. Using time–temperature superposition, master curves are constructed to estimate the service life of this material used as seals in PEMFC. ► Stress relaxation of EPDM seal for PEMFC application is investigated. ► Effect of temperature, applied strain, and environmental exposure on stress relaxation behavior is investigated. ► Using time–temperature superposition, service life of this material used as seals in PEMFC is estimated.