Mechanical properties of proton-conducting sulfonated aromatic polymer membranes: Stress-strain tests and dynamical analysis

被引:85
作者
Sgreccia, E. [1 ,2 ]
Chailan, J. -F. [3 ]
Khadhraoui, M. [2 ]
Di Vona, M. L. [1 ]
Knauth, P. [2 ]
机构
[1] Univ Roma Tor Vergata, Dip Sci Tecnol Chim, Rome, Italy
[2] Univ Aix Marseille 1, CNRS, UMR 6264, Lab Chim Provence,Ctr St Jerome, Marseille, France
[3] Univ Toulon Var, MAPIEM EA 3834, Toulon, France
关键词
PEM fuel cells; Polymer electrolytes; Thermomechanical properties; DMA; POLY(ETHER ETHER KETONE); FUEL-CELL APPLICATIONS; ELECTROLYTE MEMBRANE; WATER-UPTAKE; EXCHANGE MEMBRANES; RELATIVE-HUMIDITY; HYBRID MEMBRANES; TEMPERATURE; TRANSPORT; FILMS;
D O I
10.1016/j.jpowsour.2009.09.061
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The mechanical properties of sulfonated aromatic polymers (SAPs: SPEEK and SPPSU) are studied by tensile stress-strain tests and dynamic mechanical analysis (DMA). The elastic moduli are generally above 1 GPa with tensile strength between 25 and 80 MPa and elongation at rupture between 7 and 50%. These properties are consistent with polymers below their glass transition temperature. The glass transition and elastic moduli are strongly increased by thermal treatments of the SAP membranes, due to formation of cross-links between macromolecules. The cross-linking is observed "in situ" during DMA experiments on thermally untreated SPPSU. These data show that previously neglected SAPS might become very interesting PEM fuel cell membranes, if previously thermally treated. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码:7770 / 7775
页数:6
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