Temperature effects on the relaxation of poly(aniline) and poly(o-toluidine)

The temperature dependence of the relaxation of poly(aniline) (Pani) and poly (o-toluidine) (POT) in aqueous eutectics of H2SO4 and HClO4, in the temperature range 200 K < T < 300 K, was investigated. As the temperature decreased the anodic peak parameters, E p,a increased, ΔE1/2,a inc...

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Detalles Bibliográficos
Publicado: 2005
Materias:
Chemical relaxation
Current density
Diffusion
Free energy
Mathematical models
Oxidation
Reaction kinetics
Reduction
Sulfuric acid
Thermal effects
Anodic peak
Poly(aniline) (PANI)
Poly(o-toluidine) (POT)
Temperature dependence
Organic polymers
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00134651_v152_n3_pE75_Andrade
http://hdl.handle.net/20.500.12110/paper_00134651_v152_n3_pE75_Andrade
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00134651_v152_n3_pE75_Andrade
record_format dspace
spelling paper:paper_00134651_v152_n3_pE75_Andrade2023-06-08T14:35:42Z Temperature effects on the relaxation of poly(aniline) and poly(o-toluidine) Chemical relaxation Current density Diffusion Free energy Mathematical models Oxidation Reaction kinetics Reduction Sulfuric acid Thermal effects Anodic peak Poly(aniline) (PANI) Poly(o-toluidine) (POT) Temperature dependence Organic polymers The temperature dependence of the relaxation of poly(aniline) (Pani) and poly (o-toluidine) (POT) in aqueous eutectics of H2SO4 and HClO4, in the temperature range 200 K < T < 300 K, was investigated. As the temperature decreased the anodic peak parameters, E p,a increased, ΔE1/2,a increased, and jp, decreased. The data is interpreted qualitatively within the framework of the extended Feldberg's model, which takes into account the capacitive current contribution to the total current as well as the interaction between neighboring redox centers. The results agree with other experimental observations related to the relaxation of the polymer films. The temperature dependence of the change in the anodic peak parameters shows that the polymer relaxation decreases as the temperature is decreased. The relaxation can be explained through a kinetic process with a rate constant depending on the degree of advance of the reaction (Elovich kinetics). © 2005 The Electrochemical Society. All rights reserved. 2005 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00134651_v152_n3_pE75_Andrade http://hdl.handle.net/20.500.12110/paper_00134651_v152_n3_pE75_Andrade
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Chemical relaxation
Current density
Diffusion
Free energy
Mathematical models
Oxidation
Reaction kinetics
Reduction
Sulfuric acid
Thermal effects
Anodic peak
Poly(aniline) (PANI)
Poly(o-toluidine) (POT)
Temperature dependence
Organic polymers
spellingShingle Chemical relaxation
Current density
Diffusion
Free energy
Mathematical models
Oxidation
Reaction kinetics
Reduction
Sulfuric acid
Thermal effects
Anodic peak
Poly(aniline) (PANI)
Poly(o-toluidine) (POT)
Temperature dependence
Organic polymers
Temperature effects on the relaxation of poly(aniline) and poly(o-toluidine)
topic_facet Chemical relaxation
Current density
Diffusion
Free energy
Mathematical models
Oxidation
Reaction kinetics
Reduction
Sulfuric acid
Thermal effects
Anodic peak
Poly(aniline) (PANI)
Poly(o-toluidine) (POT)
Temperature dependence
Organic polymers
description The temperature dependence of the relaxation of poly(aniline) (Pani) and poly (o-toluidine) (POT) in aqueous eutectics of H2SO4 and HClO4, in the temperature range 200 K < T < 300 K, was investigated. As the temperature decreased the anodic peak parameters, E p,a increased, ΔE1/2,a increased, and jp, decreased. The data is interpreted qualitatively within the framework of the extended Feldberg's model, which takes into account the capacitive current contribution to the total current as well as the interaction between neighboring redox centers. The results agree with other experimental observations related to the relaxation of the polymer films. The temperature dependence of the change in the anodic peak parameters shows that the polymer relaxation decreases as the temperature is decreased. The relaxation can be explained through a kinetic process with a rate constant depending on the degree of advance of the reaction (Elovich kinetics). © 2005 The Electrochemical Society. All rights reserved.
title Temperature effects on the relaxation of poly(aniline) and poly(o-toluidine)
title_short Temperature effects on the relaxation of poly(aniline) and poly(o-toluidine)
title_full Temperature effects on the relaxation of poly(aniline) and poly(o-toluidine)
title_fullStr Temperature effects on the relaxation of poly(aniline) and poly(o-toluidine)
title_full_unstemmed Temperature effects on the relaxation of poly(aniline) and poly(o-toluidine)
title_sort temperature effects on the relaxation of poly(aniline) and poly(o-toluidine)
publishDate 2005
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00134651_v152_n3_pE75_Andrade
http://hdl.handle.net/20.500.12110/paper_00134651_v152_n3_pE75_Andrade
_version_ 1768546611234865152

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