Artículos de revistas
Effect of natural rubber latex on the conducting state of polyaniline blends determined by Raman spectroscopy
Fecha
2003-10-01Registro en:
Journal of Raman Spectroscopy. Chichester: John Wiley & Sons Ltd, v. 34, n. 10, p. 831-836, 2003.
0377-0486
10.1002/jrs.1060
WOS:000186376900014
6475585105456744
7607651111619269
0000-0001-8001-301X
Autor
Universidade Estadual Paulista (Unesp)
Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
Institución
Resumen
Blends possessing the elastomeric properties of natural rubber (NR) and the conducting properties of conducting polymer (polyaniline, PANI) were obtained, which are promising for further application in deformation sensors. Blends containing 20% (v/v) of PANI in 80% of NR latex were fabricated by casting in the form of free-standing films and treated either with HCl or with corona discharge, which lead PANI to its conducting state (doping process). Characterization was carried out by Raman spectroscopy, d.c. conductivity and thermogravimetric analysis. Evidence for chemical interaction between PANI and NR was observed, which allowed the conclusion that the NR latex itself is able partially to induce both the primary doping of PANI (by protonation) and the secondary doping of PANI (by changing the chain conformation). Further improvement in the primary doping could be obtained for the blends either by corona discharge or by exposing them to HCl the electrical conductivity reached in the blends was dependent on the doping conditions used, as observed by Raman scattering. Copyright (C) 2003 John Wiley Sons, Ltd.