Title

Creep And Stress-Rupture Of Nafion® Membranes Under Controlled Environment

Keywords

Creep; Fuel cell; Nafion®; Stress-rupture; Time-dependent failure; Time-temperature-hydration parameter

Abstract

Nafion® as a polymer shows time-dependent behavior including creep and relaxation. Application of this material in automotive fuel cells and targeted lifetimes require consideration of time-dependent failure of Nafion® in fuel cell design. In this work, creep tests for Nafion® were conducted in a controlled environment at different hydrations and temperatures. Stress-rupture curves for Nafion® were obtained for different hydrations (RH = 5%, 50% and 90%) at room temperature and also for two different temperatures (25 °C & 80 °C) at 50% relative humidity. Time-dependent failure was observed for all these conditions regardless of temperature and hydration level (state of water in Nafion®). Ionic forces created by cross linkings (by introducing water to membrane) do not seem to prevent disentanglements of the chains since there is no change in rate of time-dependent failure results. A time-hydration/temperature equivalence method (Sherby-Dorn) is suggested as a method to use short-term test data to estimate rupture times for other conditions. © 2010 Elsevier Ltd. All rights reserved.

Publication Date

7-1-2010

Publication Title

Mechanics of Materials

Volume

42

Issue

7

Number of Pages

678-685

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.mechmat.2010.04.005

Socpus ID

77955715433 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/77955715433

This document is currently not available here.

Share

COinS