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Electrically conductive, melt‐processed polyaniline/EVA blends
Author(s) -
Barra Guilherme M. O.,
Leyva Maria Elena,
Soares Bluma G.,
Mattoso L. H.,
Sens Marcio
Publication year - 2001
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.1830
Subject(s) - polyaniline , materials science , sulfonic acid , polymer blend , copolymer , conductive polymer , ethylene vinyl acetate , scanning electron microscope , polymer chemistry , composite material , conductivity , electrical resistivity and conductivity , x ray photoelectron spectroscopy , chemical engineering , polymer , chemistry , polymerization , electrical engineering , engineering
Mechanical blends of ethylene–vinyl acetate copolymer and polyaniline doped with dodecyl benzene sulfonic acid (PAni–DBSA) were prepared in a two‐roll mill at 50°C and in a Haake internal mixer at 150°C. The effects of the blend composition and processing conditions on the electrical conductivity and mechanical properties were investigated. These blends exhibited high levels of electrical conductivity at a small amount of PAni complex. Blends prepared in a two‐roll mill displayed conductivity values as high as 1 S/cm and a higher protonation degree than the pure PAni–DBSA, as indicated by X‐ray photoelectron spectroscopy. Two different insulator–conductor transition points were observed in these blends. The mechanical performance decreased as the amount of PAni–DBSA increased, indicating blend incompatibility and a plasticizing effect of the DBSA. The morphology of the blends were studied by scanning electron microscopy. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 114–123, 2001