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- W2014026436 abstract "Polymer electrolyte membrane (PEM) fuel cells can provide alternatively sourced energy, but current PEMs lose performance under certain conditions. The current work examines composition, structure and properties of poly (ethylene glycol)-aromatic polyimide-ionic liquid systems for PEM applications, as poly (ethylene glycol) (PEG) is an ion conductor and polyimides are stable. To evaluate polymer interactions, different PEG concentrations (0–50% by weight) and different PEG molecular weights (990–6000 g/mole) were examined. Characterization techniques included Fourier transform infrared spectroscopy, thermal gravimetric analysis, differential scanning calorimetry, small-angle x-ray scattering, electrochemical impedance spectroscopy and cyclic voltammetry. By increasing the PEG amount, PEG domains and polymer flexibility are increased, which increases conductivity by two to three orders of magnitude. By increasing PEG molecular weight, PEG segmental motion and PEG-polyimide interface quality are decreased, which decreases conductivity by a factor of two. The maximum conductivity was 64 mS/cm at 80 °C and 70 %RH." @default.
- W2014026436 created "2016-06-24" @default.
- W2014026436 creator A5039478299 @default.
- W2014026436 creator A5039986400 @default.
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- W2014026436 date "2014-12-01" @default.
- W2014026436 modified "2023-10-16" @default.
- W2014026436 title "Impacts of polymer–polymer interactions and interfaces on the structure and conductivity of PEG-containing polyimides doped with ionic liquid" @default.
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- W2014026436 doi "https://doi.org/10.1016/j.polymer.2014.10.075" @default.
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