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Sulfonation of PEEK-WC powder (a glassy poly-ether ether ketone) has been performed at 80°C for 3h using H 2 SO 4 conc. (96%). The degree of sulfonation varied from 15 to 40%, depending on the reaction time. The sulfonated polymers (S-PEEK-WC) were used to prepare dense membranes for possible fuel cell application. In particular, two membranes were prepared by solvent evaporation technique,...
A method for the sulfonation of PEEK-WC, a glassy poly(ether ether ketone) with sulphuric acid is presented. Depending on the reaction time, polymers with ion exchange capacity (IEC) from 0.30 to 0.76 meqH+/g are obtained, as determined by titration with NaOH solutions. The thermal properties of the polymers were studied by differential scanning calorimetry, showing that the glass transition temperature...
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