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Plasma-induced, solid-state polymerization of N-isopropylacrylamide

Authors

  • Alper Unver,

    1. Department of Chemistry, Middle East Technical University, 06531 Ankara, Turkey
    Current affiliation:
    1. Ilko Argem A. Ş., Hacettepe Üniversitesi, Teknokent 2. Ar-Ge Binası Kat: 1 No: 15 Beytepe, Ankara, Turkey
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  • Guneri Akovali

    Corresponding author
    1. Department of Chemistry, Middle East Technical University, 06531 Ankara, Turkey
    • Department of Chemistry, Middle East Technical University, 06531 Ankara, Turkey
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Abstract

The radio-frequency plasma-initiated polymerization of N-isopropylacrylamide (NIPAM) in the solid state was performed. The isolated linear polymer was characterized by 13C-NMR, 1H-NMR, and Fourier transform infrared spectroscopy, and the effects of selected operational plasma parameters (discharge power and time) on the conversion rates were studied. Reversible transitions at the volume-phase-transition temperatures of the swelled poly(N-isopropylacrylamide) hydrogels were investigated by differential scanning calorimetry. The surface morphologies before and after plasma treatment were followed by scanning electron microscopy. With the obtained X-ray diffraction results, we propose a solid-state plasma polymerization mechanism for the NIPAM. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010

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