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      Characterization of denture acrylic resin surfaces modified by glow discharges

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      Author(s)
      Süzer, Ş.
      Özden, N.
      Akaltan, F.
      Akovali, G.
      Date
      1997
      Source Title
      Applied Spectroscopy
      Print ISSN
      0003-7028
      Publisher
      Sage Publications, Inc.
      Volume
      51
      Issue
      11
      Pages
      1741 - 1744
      Language
      English
      Type
      Article
      Item Usage Stats
      196
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      204
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      Abstract
      Resin samples prepared by compression molding using a poly (methyl methacrylate) (PMMA) denture base material were exposed to radio-frequency (rf) glow discharges to improve the wettability of the material. Fourier transform infrared (FT-IR) reflectance, X-ray photoelectron spectroscopy (XPS), and contact-angle measurements have been employed to characterize the changes introduced by the glow discharge plasma. FT-IR measurements cannot detect any modification. XPS reveals an increase in the O/C atomic ratio. Contact angles of the plasma-treated samples are always lower when compared with untreated ones. The increased O atomic concentration is attributed to formation of -COH groups on the surface during plasma treatment. The O/C atomic ratio decreases upon heating the samples in vacuum to 100 °C for 1-2 min and exposing the samples to liquid CH2Cl2 for 1-2 min. Exposure to distilled water for prolonged periods causes a slight decrease during the initial 1-20 days but levels off to a constant value up to a period of 60 days. Plasma treatment seems to offer a durable increase in the wettability for these materials left in air or distilled water.
      Keywords
      Plasma modification
      PMMA
      XPS
      Chemical modification
      Contact angle
      Glow discharges
      Plasma applications
      Polymethyl methacrylates
      Wetting
      X ray photoelectron spectroscopy
      Denture base materials
      Dental composites
      Permalink
      http://hdl.handle.net/11693/25587
      Published Version (Please cite this version)
      http://doi.org/10.1366/0003702971939451
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      • Department of Chemistry 707
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