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Analysis of Conducting Poly( o ‐methoxyaniline) Blends by Impedance Spectroscopy
Author(s) -
Machado Wagner S.,
Moreira José C.,
Onmori Roberto K.,
Wang Shu H.,
Soares Demétrio A. W.
Publication year - 2006
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200651318
Subject(s) - materials science , dielectric spectroscopy , capacitance , lcr meter , dielectric , analytical chemistry (journal) , casting , sulfonic acid , conductivity , electrical impedance , polymer chemistry , relaxation (psychology) , dimethylformamide , polymer blend , morphology (biology) , optical microscope , conductive polymer , chemical engineering , composite material , polymer , scanning electron microscope , chemistry , solvent , organic chemistry , electrochemistry , optoelectronics , engineering , copolymer , biology , genetics , psychology , social psychology , electrode , electrical engineering
Impedance measurements were carried out in flexible, conducting and semi crystalline films obtained by casting poly( p ‐hydroxystyrene)‐ b ‐polyisoprene (PHS‐ b ‐IR) and p ‐toluene sulfonic acid (TSA)‐doped poly( o ‐methoxyaniline) (POMTS) mixtures from N,N‐dimethylformamide solutions. The measures ac were made in LCR Meter HP4284A equipment, in the range 10 2 –10 6 Hz. The results were analyzed using a program in LabView platform for the attainment of the impedance arcs to obtain the conducting blends parameters. The obtained results had allowed evaluating some characteristics of studied conducting POMTS blends as conductivity ac , dielectric relaxation time, and capacitance. Analysis by optical microscopy (OM) allowed the observation of quasi‐spherical particles dispersed morphology for blends with 5 to 50‐wt% of POMTS. However, this morphology was not observed for blends presenting more than 50% of POMTS.