Abstract
Sulfonated poly(ether ketone)s containing 3,5-dimethyl phthalazinone moieties (SPPEK-DMs) with different degrees of sulfonation (DS) were synthesized via direct polycondensation from 4-(3,5-dimethyl-4-hydroxyphenyl)-2,3-phthalazinone, 4,4′-difluorobenzophenone and 3,3′-disulfonate-4,4′-difluorobenzophenone. The chemical structure of SPPEK-DMs was characterized by FTIR and 1H-NMR. Thermal stability of SPPEK-DMs was characterized by the thermogravimetric analysis. The membranes prepared from SPPEK-DMs exhibited ion exchange capacities (IEC) ranging from 0.93 mmol·g−1 to 1.86 mmol·g−1. Water uptake, swelling, oxidative stability and methanol permeability of SPPEKDMs membranes were investigated. SPPEK-DMs membranes exhibited high oxidative stability. The methanol permeability values of SPPEK-DMs membranes were in the range 5.15 × 10−8–6.61 × 10−7 cm2·s−1, which was much lower than those of Nafion117. The proton conductivity of SPPEK-DM40 membranes was 1.1 × 10−2 S·cm−1 at 70°C.
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This work was financially supported by the Natural Science Foundation of Liaoning Province of China (No. 20041076).
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Zhang, Sh., Zhou, J. & Jian, Xg. Synthesis and properties of sulfonated poly(ether ketone)s containing 3,5-dimethyl phthalazinone moieties as proton exchange membrane materials. Chin J Polym Sci 30, 511–519 (2012). https://doi.org/10.1007/s10118-012-1129-z
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DOI: https://doi.org/10.1007/s10118-012-1129-z