Hopping conduction on PAni/PSS blends

Hopping conduction on PAni/PSS blends

Author Rubinger, C. P. L. Google Scholar
Costa, L. C. Google Scholar
Faez, R. Autor UNIFESP Google Scholar
Martins, C. R. Google Scholar
Rubinger, R. M. Google Scholar
Institution Univ Aveiro
Universidade Federal de São Paulo (UNIFESP)
Universidade Federal de Pernambuco (UFPE)
Univ Fed Itajuba
Abstract Conducting blends of polyaniline (PAni) and sulfonated polystyrene (PSS) were obtained by in situ polymerization. We prepared PAni/PSS blends with molar ratio of 1:2 and PSS sulfonated at the degrees of 13, 21 and 30 mol%. the blends were investigated by d.c. conductivity and scanning electron microscopy (SEM). Increasing sulfonation degree increases the conductivity and the miscibility of the blends was observed by SEM. the electrical conductivity of blends was evaluated from 100 to 300 K. We show that three-dimensional variable range hopping is observed. From the hopping parameter we obtained the mean hopping distance, the density of active centers and the energy associated with it. the hopping distance was compared to the mean distance of sulfonic groups of the PSS, indicating that interchain 3D variable range hopping is dominant at low temperatures. (C) 2008 Elsevier B.V. All rights reserved.
Keywords Polyaniline
Sulfonated polystyrene
VRH
Language English
Sponsor FCT
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Grant number FCT: 34868/2007
FCT: 34541/2007
CNPq: 300378/2003-3
FAPESP: 02/13821-8
Date 2009-03-01
Published in Synthetic Metals. Lausanne: Elsevier Science Sa, v. 159, n. 5-6, p. 523-527, 2009.
ISSN 0379-6779 (Sherpa/Romeo, impact factor)
Publisher Elsevier B.V.
Extent 523-527
Origin http://dx.doi.org/10.1016/j.synthmet.2008.11.012
Access rights Closed access
Type Article
Web of Science ID WOS:000265814500029
URI http://repositorio.unifesp.br/handle/11600/31363

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