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Investigation of electropolymerized polypyrrole composite film: Characterization and application to gas sensors
Author(s) -
Bhat N. V.,
Gadre A. P.,
Bambole V. A.
Publication year - 2003
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.11641
Subject(s) - polypyrrole , materials science , scanning electron microscope , composite number , composite material , conductive polymer , conductivity , infrared spectroscopy , chemical engineering , analytical chemistry (journal) , polymer chemistry , polymer , chemistry , polymerization , organic chemistry , engineering
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