Investigation of electropolymerized polypyrrole composite film: Characterization and application to gas sensors

Polypyrrole–Polymethylmethacrylate (PMMA + PPy) composite films were prepared electrochemically by means of codeposition at constant potential. The films were characterized by using Infrared spectroscopy, wide-angle X-ray diffraction analysis, and scanning electron microscopy. The appearance of standard and some new absorption bands for PPy and PMMA confirms the composite formation. The mechanical properties of the conducting PMMA+ PPy films were studied and found to be improved with respect to the control PPy films. The electrical conductivity of the PMMA + PPy film was measured by using standard four- and two-probe methods. The conductivity of the films was found to depend on the pyrrole content. These conducting composites were further used as gas sensors by observing the change in the current when exposed to ammonia gas. The film gives a fast and reproducible response towards ammonia gas. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 88:22–29, 2003

[1]  H. Schreiber,et al.  IR‐spektroskopische untersuchungen zur taktizität von polymethylmethacrylat , 1960 .

[2]  B. Tieke,et al.  Conducting polypyrrole-polyimide composite films , 1990 .

[3]  Keu-Hong Kim,et al.  The Chemical and Physical Properties of Electrochemically Prepared Polyindole Hexafluorophosphate (PIPF6) , 1992 .

[4]  A. Pron,et al.  Transport properties in polypyrrole–PVA composites: Evidence for hopping conduction , 1992 .

[5]  R. Waltman,et al.  Electrochemical synthesis of electrically conducting polymers from aromatic compounds , 1983 .

[6]  A. Hillman.  Polymer Modified Electrodes: Preparation and Characterisation , 1987 .

[7]  Philip N. Bartlett,et al.  Electrochemical sensors: theory and experiment , 1986 .

[8]  S. Borman.  Biosensors: potentiometric and amperometric. , 1987, Analytical chemistry.

[9]  G. Street,et al.  Conducting polymers: a review of recent work , 1981 .

[10]  Keu-Hong Kim,et al.  The chemical and physical properties of electrochemically prepared polyaniline hexafluorophosphate (PAPF6) , 1992 .

[11]  Jack E. Fernandez,et al.  Conducting polymer blends : polypyrrole and poly(vinyl methyl ketone) , 1992 .

[12]  Chungsik Kim,et al.  Polymerization mechanism and physicochemical properties of electrochemically prepared polyindole tetrafluoroborate , 1992 .

[13]  R. Murray,et al.  An Ion Gate Membrane: Electrochemical Control of Ion Permeability through a Membrane with an Embedded Electrode , 1982 .

[14]  R. L. Elsenbaumer,et al.  Structural basis for semiconducting and metallic polymer dopant systems , 1982 .

[15]  M. Krounbi,et al.  The chemical and physical properties of pyrrole‐based conducting polymers: The oxidation of neutral polypyrrole , 1983 .

[16]  R. Waltman,et al.  Conductive composties form poly(vinyl chloride) and polypyrrole , 1984 .

[17]  J. A. Logan,et al.  Electrochemistry of conducting polypyrrole films , 1981 .

[18]  T. Tamamura,et al.  Electrochemical polymerization of pyrrole on polymer-coated electrodes , 1984 .

[19]  G. Street,et al.  Conductive composites from polyvinyl alcohol and polypyrrole , 1984 .

[20]  Levent Toppare,et al.  Conducting polymer blends: polythiophene and polypyrrole blends with polystyrene and poly(bisphenol A carbonate) , 1990 .

[21]  H. Rhee,et al.  A study of polyindole perchlorate (PIP) prepared by electropolymerization , 1992 .

[22]  A. Geri,et al.  Molecular organisation of electrochemically prepared conducting polypyrrole films , 1987 .

[23]  S. Kong,et al.  The properties of electrochemically prepared Polyindole Perchlorate (PIP) , 1992 .