Degradation kinetics and lifetime prediction for polystyrene/nanocellulose nanocomposites
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1007/s10973-020-10316-7 http://hdl.handle.net/11449/205423 |
Resumo: | Cellulose nanofibers (CNFs) and cellulose nanocrystals (CNCs) were incorporated into polystyrene (PS), and thermal stability and lifetime prediction of the nanocomposites were investigated for variable filler content (0.25, 0.50 and 1% w/w). Thermogravimetric analysis (TG) was carried out at four different heating rates (5, 10, 20 and 40 °C min−1) in a non-isothermal condition, and the degradation kinetics was studied based on Friedman and Flynn–Wall–Ozawa (FWO) methods. The same thermal degradation behavior was observed for all samples in the studied range of reinforcement content. For both reinforcements (CNFs and CNCs), Friedman and FWO results showed no dependence of the activation energy on conversion degree. A single-step degradation mechanism was observed for all samples (A → B degradation model), and the kinetic studies indicated an autocatalytic reaction model with a good fitting of the curves. Lifetime prediction based on kinetic analysis was successfully applied. Lastly, nanocellulose morphology influenced nanocomposite lifetime prediction, which became more stable over time, maintaining almost 100% of the mass for 10 years exposed at 30–120 °C. |
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Degradation kinetics and lifetime prediction for polystyrene/nanocellulose nanocompositesKineticsLifetime predictionNanocelluloseNanocompositesPolystyreneThermal behaviorCellulose nanofibers (CNFs) and cellulose nanocrystals (CNCs) were incorporated into polystyrene (PS), and thermal stability and lifetime prediction of the nanocomposites were investigated for variable filler content (0.25, 0.50 and 1% w/w). Thermogravimetric analysis (TG) was carried out at four different heating rates (5, 10, 20 and 40 °C min−1) in a non-isothermal condition, and the degradation kinetics was studied based on Friedman and Flynn–Wall–Ozawa (FWO) methods. The same thermal degradation behavior was observed for all samples in the studied range of reinforcement content. For both reinforcements (CNFs and CNCs), Friedman and FWO results showed no dependence of the activation energy on conversion degree. A single-step degradation mechanism was observed for all samples (A → B degradation model), and the kinetic studies indicated an autocatalytic reaction model with a good fitting of the curves. Lifetime prediction based on kinetic analysis was successfully applied. Lastly, nanocellulose morphology influenced nanocomposite lifetime prediction, which became more stable over time, maintaining almost 100% of the mass for 10 years exposed at 30–120 °C.Postgraduate Program in Engineering of Processes and Technologies (PGEPROTEC) Universidade Caxias do Sul (UCS), Rua Francisco Getúlio Vargas, 1130Fatigue and Aeronautical Material Research Group Department of Materials and Technology School of Engineering Universidade Estadual Paulista (UNESP), Av. Dr. Ariberto Pereira da Cunha, 333Postgraduate Program in Mining Metallurgical and Materials Engineering (PPGE3M) Federal University of Rio Grande do SulFatigue and Aeronautical Material Research Group Department of Materials and Technology School of Engineering Universidade Estadual Paulista (UNESP), Av. Dr. Ariberto Pereira da Cunha, 333Universidade Caxias do Sul (UCS)Universidade Estadual Paulista (Unesp)Federal University of Rio Grande do SulNeves, Roberta MottaOrnaghi, Heitor Luiz [UNESP]Ornaghi, Felipe Gustavo [UNESP]Amico, Sandro CamposZattera, Ademir José2021-06-25T10:15:03Z2021-06-25T10:15:03Z2020-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1007/s10973-020-10316-7Journal of Thermal Analysis and Calorimetry.1588-29261388-6150http://hdl.handle.net/11449/20542310.1007/s10973-020-10316-72-s2.0-85094949111Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Thermal Analysis and Calorimetryinfo:eu-repo/semantics/openAccess2021-10-23T14:26:31Zoai:repositorio.unesp.br:11449/205423Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T14:26:31Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Degradation kinetics and lifetime prediction for polystyrene/nanocellulose nanocomposites |
title |
Degradation kinetics and lifetime prediction for polystyrene/nanocellulose nanocomposites |
spellingShingle |
Degradation kinetics and lifetime prediction for polystyrene/nanocellulose nanocomposites Neves, Roberta Motta Kinetics Lifetime prediction Nanocellulose Nanocomposites Polystyrene Thermal behavior |
title_short |
Degradation kinetics and lifetime prediction for polystyrene/nanocellulose nanocomposites |
title_full |
Degradation kinetics and lifetime prediction for polystyrene/nanocellulose nanocomposites |
title_fullStr |
Degradation kinetics and lifetime prediction for polystyrene/nanocellulose nanocomposites |
title_full_unstemmed |
Degradation kinetics and lifetime prediction for polystyrene/nanocellulose nanocomposites |
title_sort |
Degradation kinetics and lifetime prediction for polystyrene/nanocellulose nanocomposites |
author |
Neves, Roberta Motta |
author_facet |
Neves, Roberta Motta Ornaghi, Heitor Luiz [UNESP] Ornaghi, Felipe Gustavo [UNESP] Amico, Sandro Campos Zattera, Ademir José |
author_role |
author |
author2 |
Ornaghi, Heitor Luiz [UNESP] Ornaghi, Felipe Gustavo [UNESP] Amico, Sandro Campos Zattera, Ademir José |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade Caxias do Sul (UCS) Universidade Estadual Paulista (Unesp) Federal University of Rio Grande do Sul |
dc.contributor.author.fl_str_mv |
Neves, Roberta Motta Ornaghi, Heitor Luiz [UNESP] Ornaghi, Felipe Gustavo [UNESP] Amico, Sandro Campos Zattera, Ademir José |
dc.subject.por.fl_str_mv |
Kinetics Lifetime prediction Nanocellulose Nanocomposites Polystyrene Thermal behavior |
topic |
Kinetics Lifetime prediction Nanocellulose Nanocomposites Polystyrene Thermal behavior |
description |
Cellulose nanofibers (CNFs) and cellulose nanocrystals (CNCs) were incorporated into polystyrene (PS), and thermal stability and lifetime prediction of the nanocomposites were investigated for variable filler content (0.25, 0.50 and 1% w/w). Thermogravimetric analysis (TG) was carried out at four different heating rates (5, 10, 20 and 40 °C min−1) in a non-isothermal condition, and the degradation kinetics was studied based on Friedman and Flynn–Wall–Ozawa (FWO) methods. The same thermal degradation behavior was observed for all samples in the studied range of reinforcement content. For both reinforcements (CNFs and CNCs), Friedman and FWO results showed no dependence of the activation energy on conversion degree. A single-step degradation mechanism was observed for all samples (A → B degradation model), and the kinetic studies indicated an autocatalytic reaction model with a good fitting of the curves. Lifetime prediction based on kinetic analysis was successfully applied. Lastly, nanocellulose morphology influenced nanocomposite lifetime prediction, which became more stable over time, maintaining almost 100% of the mass for 10 years exposed at 30–120 °C. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-01-01 2021-06-25T10:15:03Z 2021-06-25T10:15:03Z |
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/10.1007/s10973-020-10316-7 Journal of Thermal Analysis and Calorimetry. 1588-2926 1388-6150 http://hdl.handle.net/11449/205423 10.1007/s10973-020-10316-7 2-s2.0-85094949111 |
url |
http://dx.doi.org/10.1007/s10973-020-10316-7 http://hdl.handle.net/11449/205423 |
identifier_str_mv |
Journal of Thermal Analysis and Calorimetry. 1588-2926 1388-6150 10.1007/s10973-020-10316-7 2-s2.0-85094949111 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Thermal Analysis and Calorimetry |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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_ |
1803046031694233600 |