Physically and Chemically Cross-Linked Poly{[(maleic anhydride)-alt-styrene]-co-(2-acrylamido-2-methyl-1-propanesulfonic acid)}/Poly(ethylene glycol) Proton-Exchange Membranes
Yılser G. Devrim
Department of Chemical Engineering, Faculty of Engineering, Hacettepe University, Beytepe, 06800 Ankara, Turkey
Search for more papers by this authorZakir Rzaev
Department of Chemical Engineering, Faculty of Engineering, Hacettepe University, Beytepe, 06800 Ankara, Turkey
Search for more papers by this authorCorresponding Author
Erhan Pişkin
Department of Chemical Engineering, Faculty of Engineering, Hacettepe University, Beytepe, 06800 Ankara, Turkey
Department of Chemical Engineering, Faculty of Engineering, Hacettepe University, Beytepe, 06800 Ankara, Turkey. Fax: +90 312 299 2124Search for more papers by this authorYılser G. Devrim
Department of Chemical Engineering, Faculty of Engineering, Hacettepe University, Beytepe, 06800 Ankara, Turkey
Search for more papers by this authorZakir Rzaev
Department of Chemical Engineering, Faculty of Engineering, Hacettepe University, Beytepe, 06800 Ankara, Turkey
Search for more papers by this authorCorresponding Author
Erhan Pişkin
Department of Chemical Engineering, Faculty of Engineering, Hacettepe University, Beytepe, 06800 Ankara, Turkey
Department of Chemical Engineering, Faculty of Engineering, Hacettepe University, Beytepe, 06800 Ankara, Turkey. Fax: +90 312 299 2124Search for more papers by this authorAbstract
Novel proton exchange membranes were solvent-cast from DMF solutions of the terpolymers poly[(MA-alt-S)-co-AMPS], containing hydrophobic phenyl and reactive hydrophilic carboxylic and organo-sulfonic acid fragments with different compositions, and PEGs with different molecular weights and amounts. These membranes were formed as a result of physical (via H-bonding) and chemical (via PEG) cross-linking. The structures of membranes were confirmed by FT-IR and 1H- and 13C NMR spectroscopy. Mechanical and thermal properties, swellability, and proton conductivity of these membranes were significantly affected both by the chemical composition of the terpolymers (mainly the AMPS content) and also the cross-linker (PEG) molecular weight and content in the final form of the membranes. It was concluded that the membranes prepared by using the terpolymer with an AMPS content of 36.84 mol-% and PEG with a molecular weight of 1 450 and with an initial PEG content of 30 wt.-% are the most suitable ones for fuel cell applications.
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