caa a22 4500 44582817X CHVBK 20180317145305.0 cr unu---uuuuu 170323e20110401xx s 000 0 eng 10.1007/s10854-010-0146-3 doi (NATIONALLICENCE)springer-10.1007/s10854-010-0146-3 Electrical properties of the DGEBA/PANI-Ag composites [Elektronische Daten] [Maria Leyva, Filiberto Garcia, Alvaro de Queiroz, Demétrio Soares] The metallopolymer polyaniline-silver (PANI-Ag) was synthesized and used as conductive filler in crosslinked diglycidyl ether of bisphenol A (DGEBA) epoxy network. The hybrid organic/inorganic PANI-Ag powders were successfully synthesized via in situ chemical oxidation of polyaniline-emeraldine base (PANI-EB) by the capped Ag+ on the polyaniline-emeraldine base (PANI-EB) surface. The UV-Vis and FT-IR spectra confirmed the pernigraniline structure (PN) of PANI in the hybrid PANI-Ag. The PANI-Ag dispersion in epoxidic matrix was analyzed by optical microscopy (OM). The images analysis from OM showed that the particle agglomerate size of the metallopolymer increased with increasing PANI-Ag concentration in the DGEBA composite, owing to the aggregation effect. The dc conductivity and impedance spectroscopy of the DGEBA/PANI-Ag composite was measured at different PANI-Ag concentrations in the DGEBA network. The electrical dc conductivity of the PANI-Ag was 35.1Scm−1 and was dependent of the PANI-Ag concentration in DGEBA matrix. The real and imaginary part of impedance complex measurements indicates a strong interfacial polarization at low frequency for both PANI-Ag and DGEBA/PANI-Ag, respectively. The imaginary part of impedance complex Im(Z) data decrease with the PANI-Ag hybrid concentration in the frequencies range of 102-106Hz. The dependence of the Im(Z) on the frequency exhibited a relaxation process in both, PANI-Ag and DGEBA/PANI-Ag composite with 10phr of PANI-Ag powder. Springer Science+Business Media, LLC, 2010 Leyva Maria Departamento de Física e Química, Instituto de Ciências Exatas, Universidade Federal de Itajubá (UNIFEI), Av. BPS, 1303, Bairro Pinheirinho, CEP 37500-903, Itajubá, MG, Brazil aut Garcia Filiberto Departamento de Física e Química, Instituto de Ciências Exatas, Universidade Federal de Itajubá (UNIFEI), Av. BPS, 1303, Bairro Pinheirinho, CEP 37500-903, Itajubá, MG, Brazil aut de Queiroz Alvaro Departamento de Física e Química, Instituto de Ciências Exatas, Universidade Federal de Itajubá (UNIFEI), Av. BPS, 1303, Bairro Pinheirinho, CEP 37500-903, Itajubá, MG, Brazil aut Soares Demétrio Departamento de Física e Química, Instituto de Ciências Exatas, Universidade Federal de Itajubá (UNIFEI), Av. BPS, 1303, Bairro Pinheirinho, CEP 37500-903, Itajubá, MG, Brazil aut Journal of Materials Science: Materials in Electronics Springer US; http://www.springer-ny.com 22/4(2011-04-01), 376-383 0957-4522 22:4<376 2011 22 10854 https://doi.org/10.1007/s10854-010-0146-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10854-010-0146-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Leyva Maria Departamento de Física e Química, Instituto de Ciências Exatas, Universidade Federal de Itajubá (UNIFEI), Av. BPS, 1303, Bairro Pinheirinho, CEP 37500-903, Itajubá, MG, Brazil aut NATIONALLICENCE 700 1- Garcia Filiberto Departamento de Física e Química, Instituto de Ciências Exatas, Universidade Federal de Itajubá (UNIFEI), Av. BPS, 1303, Bairro Pinheirinho, CEP 37500-903, Itajubá, MG, Brazil aut NATIONALLICENCE 700 1- de Queiroz Alvaro Departamento de Física e Química, Instituto de Ciências Exatas, Universidade Federal de Itajubá (UNIFEI), Av. BPS, 1303, Bairro Pinheirinho, CEP 37500-903, Itajubá, MG, Brazil aut NATIONALLICENCE 700 1- Soares Demétrio Departamento de Física e Química, Instituto de Ciências Exatas, Universidade Federal de Itajubá (UNIFEI), Av. BPS, 1303, Bairro Pinheirinho, CEP 37500-903, Itajubá, MG, Brazil aut NATIONALLICENCE 773 0- Journal of Materials Science: Materials in Electronics Springer US; http://www.springer-ny.com 22/4(2011-04-01), 376-383 0957-4522 22:4<376 2011 22 10854 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer