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Dielectric, FTIR spectroscopic and atomic force microscopic studies on polypyrrole‐poly(acrylonitrile‐ co ‐vinyl acetate) composites
Author(s) -
Cetiner Suat,
Kalaoglu Fatma,
Karakas Hale,
Sarac A. Sezai
Publication year - 2011
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.21075
Subject(s) - materials science , polyacrylonitrile , polypyrrole , acrylonitrile , composite material , vinyl acetate , composite number , polymerization , dielectric , fourier transform infrared spectroscopy , conductivity , polymer chemistry , polymer , chemical engineering , copolymer , chemistry , optoelectronics , engineering
In this study, Poly(acrylonitrile‐ co ‐vinyl acetate) [P(AN‐ co ‐VAc)] composite films were fabricated by chemical polymerization of pyrrole (Py) with cerium(IV) (Ce(IV)) on P(AN‐ co ‐VAc) matrix. The effect of amount of Py and temperature on the composite film properties was studied in a frequency range starting from 0.05 Hz to 10 MHz and in a temperature range from 0 to 250°C. The electric modulus provides a good description of the dielectric relaxation of the conducting polymer composites. The atomic force microscopy images of the polypyrrole (PPy)‐P(AN‐co‐VAc) composites show the polymerization of Py on P(AN‐co‐VAc) matrix producing different sized grainy orientations resulting in higher conductivity values that increase with average grain size. The real [(ε′) or ε′(ω)] and imaginary [(ε″) or ε″(ω)] parts of the permittivity of PPy‐P(AN‐ co ‐VAc) composite were comparatively higher than PPy‐Polyacrylonitrile (PAN) and P(AN‐ co ‐VAc). It was also seen that the conductivity of PPy‐P(AN‐co‐VAc) composite was considerably higher than PPy‐PAN and P(AN‐co‐VAc) itself. POLYM. COMPOS., 2011. © 2011 Society of Plastics Engineers