Non-isothermal decomposition kinetics of conductive polyaniline and its derivatives
Autor(a) principal: | |
---|---|
Data de Publicação: | 2018 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/0104-1428.03116 http://hdl.handle.net/11449/188234 |
Resumo: | The non-isothermal decomposition kinetics of conductive polyaniline (PANI) and its derivatives, poly(o-methoxyaniline) (POMA) and poly(o-ethoxyaniline) (POEA), was investigated by thermogravimetric analysis (TGA), under inert and oxidative atmospheres, using Flynn-Wall-Ozawa's approach to assess the kinetic parameters of the decomposition process. The order of reaction was found to be dependent on the degree of conversion indicating that both the early and the later stages of polymer degradation were next the zero or pseudo zero order kinetics, whereas the intermediate stages follow a first order kinetics. The activation energy was found to be dependent on both the degree of conversion and PANI derivative. Activation energy values vary from 125 to 250 kJ/mol, to decompositions carried out under nitrogen, and 75 to 120 kJ/mol to oxidative atmosphere. Parent PANI presented the best thermal stability and suggesting that thermal stability is also influenced by derivatization and type of atmosphere used. |
id |
UNSP_c9229998b882e6b8f838ba206681ec6e |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/188234 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
Non-isothermal decomposition kinetics of conductive polyaniline and its derivativesFlynn-Wall-Ozawa's approachPANIPOEAPOMAThermal decompositionThe non-isothermal decomposition kinetics of conductive polyaniline (PANI) and its derivatives, poly(o-methoxyaniline) (POMA) and poly(o-ethoxyaniline) (POEA), was investigated by thermogravimetric analysis (TGA), under inert and oxidative atmospheres, using Flynn-Wall-Ozawa's approach to assess the kinetic parameters of the decomposition process. The order of reaction was found to be dependent on the degree of conversion indicating that both the early and the later stages of polymer degradation were next the zero or pseudo zero order kinetics, whereas the intermediate stages follow a first order kinetics. The activation energy was found to be dependent on both the degree of conversion and PANI derivative. Activation energy values vary from 125 to 250 kJ/mol, to decompositions carried out under nitrogen, and 75 to 120 kJ/mol to oxidative atmosphere. Parent PANI presented the best thermal stability and suggesting that thermal stability is also influenced by derivatization and type of atmosphere used.Universidade Federal Do Acre-UFAC Campus FlorestaDepartamento de Física e Química-DFQ Universidade Estadual Paulista júlio de Mesquita Filho-UNESP Campus de Ilha SolteiraLaboratório de Nanotecnologia para O Agronegócio-LNNA Centro Nacional de Pesquisa e Desenvolvimento de Instrumentacao Agropecuaria-CNPDIA Empresa Brasileira de Pesquisa Agropecuária-EMBRAPALaboratório de Materiais e Biossistemas-LAMAB Universidade Federal da Paraíba-UFPBDepartamento de Física e Química-DFQ Universidade Estadual Paulista júlio de Mesquita Filho-UNESP Campus de Ilha SolteiraUniversidade Federal Do Acre-UFACUniversidade Estadual Paulista (Unesp)Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)Universidade Federal da Paraíba (UFPB)Alves, William FerreiraMalmonge, José Antonio [UNESP]Mattoso, Luiz Henrique CapparelliDe Medeiros, Eliton Souto2019-10-06T16:01:36Z2019-10-06T16:01:36Z2018-08-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article285-292application/pdfhttp://dx.doi.org/10.1590/0104-1428.03116Polimeros, v. 28, n. 4, p. 285-292, 2018.1678-51690104-1428http://hdl.handle.net/11449/18823410.1590/0104-1428.03116S0104-142820180004002852-s2.0-85055173835S0104-14282018000400285.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPolimerosinfo:eu-repo/semantics/openAccess2024-07-10T14:07:11Zoai:repositorio.unesp.br:11449/188234Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T14:14:44.708647Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Non-isothermal decomposition kinetics of conductive polyaniline and its derivatives |
title |
Non-isothermal decomposition kinetics of conductive polyaniline and its derivatives |
spellingShingle |
Non-isothermal decomposition kinetics of conductive polyaniline and its derivatives Non-isothermal decomposition kinetics of conductive polyaniline and its derivatives Alves, William Ferreira Flynn-Wall-Ozawa's approach PANI POEA POMA Thermal decomposition Alves, William Ferreira Flynn-Wall-Ozawa's approach PANI POEA POMA Thermal decomposition |
title_short |
Non-isothermal decomposition kinetics of conductive polyaniline and its derivatives |
title_full |
Non-isothermal decomposition kinetics of conductive polyaniline and its derivatives |
title_fullStr |
Non-isothermal decomposition kinetics of conductive polyaniline and its derivatives Non-isothermal decomposition kinetics of conductive polyaniline and its derivatives |
title_full_unstemmed |
Non-isothermal decomposition kinetics of conductive polyaniline and its derivatives Non-isothermal decomposition kinetics of conductive polyaniline and its derivatives |
title_sort |
Non-isothermal decomposition kinetics of conductive polyaniline and its derivatives |
author |
Alves, William Ferreira |
author_facet |
Alves, William Ferreira Alves, William Ferreira Malmonge, José Antonio [UNESP] Mattoso, Luiz Henrique Capparelli De Medeiros, Eliton Souto Malmonge, José Antonio [UNESP] Mattoso, Luiz Henrique Capparelli De Medeiros, Eliton Souto |
author_role |
author |
author2 |
Malmonge, José Antonio [UNESP] Mattoso, Luiz Henrique Capparelli De Medeiros, Eliton Souto |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal Do Acre-UFAC Universidade Estadual Paulista (Unesp) Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) Universidade Federal da Paraíba (UFPB) |
dc.contributor.author.fl_str_mv |
Alves, William Ferreira Malmonge, José Antonio [UNESP] Mattoso, Luiz Henrique Capparelli De Medeiros, Eliton Souto |
dc.subject.por.fl_str_mv |
Flynn-Wall-Ozawa's approach PANI POEA POMA Thermal decomposition |
topic |
Flynn-Wall-Ozawa's approach PANI POEA POMA Thermal decomposition |
description |
The non-isothermal decomposition kinetics of conductive polyaniline (PANI) and its derivatives, poly(o-methoxyaniline) (POMA) and poly(o-ethoxyaniline) (POEA), was investigated by thermogravimetric analysis (TGA), under inert and oxidative atmospheres, using Flynn-Wall-Ozawa's approach to assess the kinetic parameters of the decomposition process. The order of reaction was found to be dependent on the degree of conversion indicating that both the early and the later stages of polymer degradation were next the zero or pseudo zero order kinetics, whereas the intermediate stages follow a first order kinetics. The activation energy was found to be dependent on both the degree of conversion and PANI derivative. Activation energy values vary from 125 to 250 kJ/mol, to decompositions carried out under nitrogen, and 75 to 120 kJ/mol to oxidative atmosphere. Parent PANI presented the best thermal stability and suggesting that thermal stability is also influenced by derivatization and type of atmosphere used. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-08-01 2019-10-06T16:01:36Z 2019-10-06T16:01:36Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1590/0104-1428.03116 Polimeros, v. 28, n. 4, p. 285-292, 2018. 1678-5169 0104-1428 http://hdl.handle.net/11449/188234 10.1590/0104-1428.03116 S0104-14282018000400285 2-s2.0-85055173835 S0104-14282018000400285.pdf |
url |
http://dx.doi.org/10.1590/0104-1428.03116 http://hdl.handle.net/11449/188234 |
identifier_str_mv |
Polimeros, v. 28, n. 4, p. 285-292, 2018. 1678-5169 0104-1428 10.1590/0104-1428.03116 S0104-14282018000400285 2-s2.0-85055173835 S0104-14282018000400285.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Polimeros |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
285-292 application/pdf |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1822180785886593025 |
dc.identifier.doi.none.fl_str_mv |
10.1590/0104-1428.03116 |