Characterization and Properties of the Plasma Polymer Films prepared from Carbon Dioxide and 1,3-Butadiene

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  • Shoji Atsumu
    Bio-Nano Electronics Research Center, Toyo University
  • Nakamura Kenji
    Department of Applied Chemistry, Faculty of Engineering, Toyo University
  • Nishiyama Satoko
    Bio-Nano Electronics Research Center, Toyo University
  • Kumar D. Sakthi
    REDS Group, Saitama Small Enterprise Promotion Corporation
  • Murato Katsuto
    Department of Applied Chemistry, Faculty of Engineering, Toyo University
  • Nakagawa Yuichi
    Department of Applied Chemistry, Faculty of Engineering, Toyo University
  • Noguchi Hiromichi
    Department of Applied Chemistry, Faculty of Engineering, Toyo University
  • Kashiwagi Kunihiro
    Department of Applied Chemistry, Faculty of Engineering, Toyo University
  • Yoshida Yasuhiko
    Department of Applied Chemistry, Faculty of Engineering, Toyo University REDS Group, Saitama Small Enterprise Promotion Corporation
  • Ishii Shigeru
    Department of Applied Chemistry, Faculty of Engineering, Toyo University

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We prepared plasma-polymerized thin films from a mixed gas of carbon dioxide and 1,3-butadiene. Their XPS and FT-IR spectra revealed that hydrophilic groups such as hydroxyl, carboxyl and carbonyl groups existed in the thin films. The content of the C-H carbons gradually decreased with increase in the plasma output power or the CO2/butadiene flow rate ratio, while the amounts of carbonyl and carboxyl carbons increased correspondingly. In addition, coating of the plasma-polymerized CO2/butadiene thin film on a polytetrafluoroethylene substrate was found to enhance the adhesion strength when the surface-modified substrate was bonded to a steel plate with an α-cyanoacrylate adhesive. These superior adhesion properties of the plasma-polymerized thin films formed on the substrates indicate that the oxygen-containing functional groups formed at the film surface play a major role in increasing the adhesion strength.

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