Os processos redox da polianilina dopada secundariamente e dopada primariamente pré-aquecidas (150 o C, 6-12 horas) foram investigados pela espectroscopia Raman ressonante in-situ. Os espectros Raman do polímero dopado secundariamente mostram uma maior dependência com o aumento do potencial do que o polímero dopado primariamente pré-aquecido. Estes diferentes comportamentos foram atribuídos à presença de diferentes graus de ligações cruzadas nos polímeros. A presença de diferentes quantidades de ligações cruzadas foi confirmada por análise termogravimétrica, espectroscopia UV-vis e voltametria cíclica.The redox processes of secondarily doped and the pre-heated primarily doped polyaniline (150 o C, 6-12 h) were investigated by in-situ resonance Raman spectroscopy. Raman spectra of secondarily doped polymer is more dependent on potential than those observed in the pre-heated primarily doped polymer. These different behaviors were attributed to the presence of different degree of crosslinking in the polymers. The presence of different amounts of crosslinking was confirmed by thermogravimetric analysis, UV-vis spectroscopy and cyclic voltammetry.
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