Abstract
AbstractThe ultraviolet‐induced graft copolymerization of allyl methacrylate into poly(ethylene terephthalate) films and the subsequent sulfonation of the grafted film were performed to prepare a polymer electrolyte membrane (PEM). The sulfonation reaction occurred at the grafted chain under mild conditions; that is, the grafted film was easily transformed into a PEM. The mechanical, chemical, and thermal properties of the prepared PEM (i.e., the ion‐exchange capacity, water uptake, tensile strengths at different water uptakes and temperatures, stability in hydrogen peroxide solutions, and proton conductivity) were measured with titrimetric and gravimetric analyses; most were found to be better than those of Nafion. The maximum ion‐exchange capacity and proton conductivity of the PEM were observed to be 0.072 mmol/g and 0.0458 S/cm, respectively. Because this PEM is inexpensive to prepare with available raw materials and has the properties required for fuel cells, it could be an attractive and suitable device for use in fuel‐cell technology. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
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