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Authors
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Muthu Lakshmi, R.T.S. ; Meier-Haack, J. ; Schlenstedt, K. ; Vogel, C. ; Choudhary, V. ; Varma, I.K.
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Title
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Sulphonated poly(ether ether ketone) copolymers: Synthesis, characterization and membrane properties
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Date
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30.08.2005
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Number
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13004
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Abstract
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Novel sulphonated poly(ether ether ketone) (PEEK) copolymers with controlled degree of sulphonation were synthesized by polycondensation reaction of varying ratios of silylated phenolphthalein, silylated biphenol, 5,5′-carbonyl-bis(2-fluoro benzene sulphonate) (sulphonated 4,4′-difluorobenzophenone) and 4,4′-difluorobenzophenone. The structure of the copolymers was confirmed by using ATR and <sup>1</sup>H NMR techniques. Molecular mass of these samples was determined by GPC. Thermal stability of the samples was evaluated using TGA technique. Methanol diffusion coefficients were in the range of 6.57 × 10<sup>−8</sup> to 2.5 × 10<sup>−6</sup> cm<sup>2</sup>/s. The proton conductivity of the membranes in the temperature range of 25–75 °C was found to be 10<sup>−5</sup> to 10<sup>−3</sup> S/cm.
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Publisher
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Journal of Membrane Science
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Wikidata
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Citation
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Journal of Membrane Science 261 (2005) 27-35
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DOI
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https://doi.org/10.1016/j.memsci.2005.03.007
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Tags
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