Mechanical properties of perfluoro sulfonated acids: The role of temperature and solute activity
作者： Qiao Zhao , Jay Benziger
DOI: 10.1002/POLB.23284
关键词:
摘要: Water sorption and mechanical properties of perfluoro sulfonated acids (PFSAs), Aquivion Nafion, are compared under environmentally controlled conditions from 25 to 120 degrees C water activities 00.95. Under dry Nafion have thermal transitions at 60 95 C, respectively, where the elastic modulus decreases rapidly with increasing temperature. Below their transition temperatures plasticizes both PFSAs; moduli decrease activity. Above stiffens polymers; activity 0 0.01 increases by a factor >10. Plasticization stiffening reversible changing constant The in PFSAs is suggested result clustering ionic groups. higher temperature for reduce risk membrane thinning failure due creep. (c) 2013 Wiley Periodicals, Inc. J. Polym. Sci. Part B: Phys. 2013, 51, 915925
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