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- W1985376876 abstract "Abstract Sulfonated polystyrene-block-poly(ethyl-ran-propylene)-block-polystyrene ( S -polySEPS) was synthesized by sulfonation at the phenyl groups of polySEPS with the various concentrations of chlorosulfonic acid (CSA). The proton conductivity of the S -polySEPS films was ranged from 10 −2 to 10 −1 S/cm. In particular, the S -polySEPS film prepared with polySEPS/CSA (molar ratio, 1.0/1.0) has the best proton conductivity (1.36×10 −1 S/cm) and water uptake (68%) at 90 °C. Most of the S -polySEPS films have higher proton conductivity and water content than Nafion ® 117 at the considering temperature range. The IEC value of the films was improved with increasing the concentration of ionic groups. The TEM image shows that micro-phase separated channels were comprised of ionic-segments displayed within polySEPS matrix. The size of dark ionic channels was about 5–12 nm. The 1 H NMR and FT-IR analysis was used to verify the sulfonation of polySEPS. The TGA was carried out to investigate the thermal stability of the S -polySEPS films. The current density of the S -polySEPS film (1100 mA/cm 2 ) prepared with polySEPS/CSA (molar ratio, 1.0/1.0) was higher than that of the Nafion ® 117 (680 mA/cm 2 ) at 0.7 V." @default.
- W1985376876 created "2016-06-24" @default.
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- W1985376876 date "2013-10-01" @default.
- W1985376876 modified "2023-09-27" @default.
- W1985376876 title "Characterization of sulfonated polystyrene-block-poly(ethyl-ran-propylene)-block-polystyrene copolymer for proton exchange membranes (PEMs)" @default.
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- W1985376876 doi "https://doi.org/10.1016/j.memsci.2013.04.055" @default.
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