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      Doping of 2-Cl-PANI/PVC films by exposure to UV, γ-rays and e-beams

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      Author(s)
      Sevil, U. A.
      Güven, O.
      Birer, Ö.
      Süzer, Ş.
      Date
      2000
      Source Title
      Synthetic Metals
      Print ISSN
      0379-6779
      Publisher
      Elsevier Sequoia SA, Lausanne, Switzerland
      Volume
      110
      Issue
      3
      Pages
      175 - 179
      Language
      English
      Type
      Article
      Item Usage Stats
      191
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      178
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      Abstract
      2-Chloro-polyaniline (2-Cl-PANI) is chemically prepared in its non-conducting (Emeraldine Base, EB) form and dissolved together with polyvinylchloride (PVC) in THF for casting into thin (10-50 μm) composite films. The electrical conductivity of these films increases by more than four orders of magnitude (from 10-6 to 10-2 S/cm) when they are exposed to UV, γ-rays and e-beams. This is attributed to the dehydrochlorination (loss of HCl) of PVC by exposure to energetic particles and subsequent doping of the 2-Cl-PANI (i.e., conversion to Emeraldine Salt, ES) by the in-situ-created HCl. The doped films can also be returned to their undoped form by further exposure to NH3 vapours. The UV (or other particles)-induced doping/NH3 undoping cycles can be repeated several times until almost total dehydrochlorination of the PVC matrix. UV-Vis-NIR, Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopic (XPS) techniques are employed to follow the changes in the composite films upon doping by exposure to these energetic particles.
      Keywords
      Ammonia
      Conductive plastics
      Doping (additives)
      Electric conductivity of solids
      Electron beams
      Fourier transform infrared spectroscopy
      Gamma ray production
      Plastic films
      Polyvinyl chlorides
      Thin films
      Ultraviolet radiation
      X ray photoelectron spectroscopy
      Dehydrochlorination
      Polyanilines
      Conductive films
      Permalink
      http://hdl.handle.net/11693/25057
      Published Version (Please cite this version)
      http://dx.doi.org/10.1016/S0379-6779(99)00266-0
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