An instrument for environmental control of vapor pressure and temperature for tensile creep and other mechanical property measurements

P. W. Majsztrik, Andrew Bruce Bocarsly, Jay Burton Benziger

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

An instrument for measuring the creep response of a material maintained under a controlled environment of temperature and vapor pressure is described. The temperature range of the instrument is 20-250°C while the range of vapor pressure is 0-1 atm. Data are presented for tests conducted on this instrument with Nafion®, a perfluorinated ionomer developed by DuPont and used as a membrane in polymer exchange membrane fuel cells, over a range of temperature and water vapor pressure. The data are useful for predicting long-term, creep behavior of the material in the fuel cell environment as well as providing insight to molecular level interactions in the material as a function of temperature and hydration. Measurements including dynamic and equilibrium strain due to water uptake as well as elastic modulus are described. The main features of the instrument are presented along with experimental methodology and analysis of results. The adaptation of the instrument to other mechanical tests is briefly described.

Original languageEnglish (US)
Article number103904
JournalReview of Scientific Instruments
Volume78
Issue number10
DOIs
StatePublished - Nov 19 2007

All Science Journal Classification (ASJC) codes

  • Instrumentation

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