Reprocessability of PHB in extrusion: ATR-FTIR, tensile tests and thermal studies

Detalhes bibliográficos
Autor(a) principal: Rivas, Leonardo Fabio
Data de Publicação: 2017
Outros Autores: Casarin, Suzan Aline, Nepomuceno, Neymara Cavalcante, Alencar, Marie Isabele, Marcondes Agnelli, Jose Augusto, de Medeiros, Eliton Souto, Wanderley Neto, Alcides de Oliveira, de Oliveira, Mauricio Pinheiro [UNIFESP], de Medeiros, Antonio Marcos, Ferreira e Santos, Amelia Severino
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNIFESP
Texto Completo: http://dx.doi.org/10.1590/0104-1428.2406
https://repositorio.unifesp.br/handle/11600/54765
Resumo: Mechanical recycling of biodegradable plastics has to be encouraged, since the consumption of energy and raw materials can be reduced towards a sustainable development in plastics materials. In this study, the evolution of thermal and mechanical properties, as well as structural changes of poly(hydroxybutyrate) (PHB) up to three extrusion cycles were investigated. Results indicated a significant reduction in mechanical properties already at the second extrusion cycle, with a reduction above 50% in the third cycle. An increase in the crystallinity index was observed due to chemicrystallization process during degradation by chain scission. On the other hand, significant changes in the chemical structure or in thermal stability of PHB cannot be detected by Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analyses (TGA), respectively.
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spelling Reprocessability of PHB in extrusion: ATR-FTIR, tensile tests and thermal studiesbiopolymerdegradationPHBrecyclingreprocessingMechanical recycling of biodegradable plastics has to be encouraged, since the consumption of energy and raw materials can be reduced towards a sustainable development in plastics materials. In this study, the evolution of thermal and mechanical properties, as well as structural changes of poly(hydroxybutyrate) (PHB) up to three extrusion cycles were investigated. Results indicated a significant reduction in mechanical properties already at the second extrusion cycle, with a reduction above 50% in the third cycle. An increase in the crystallinity index was observed due to chemicrystallization process during degradation by chain scission. On the other hand, significant changes in the chemical structure or in thermal stability of PHB cannot be detected by Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analyses (TGA), respectively.Univ Fed Rio Grande Norte UFRN, Dept Mat Engn DEMat, Natal, RN, BrazilUniv Fed Sao Carlos UFSCar, Dept Mat Engn DEMa, Sao Carlos, SP, BrazilUniv Fed Paraiba UFPB, Dept Mat Engn DEMAT, Joao Pessoa, Paraiba, BrazilUniv Fed Rio Grande Norte UFRN, Dept Chem DQ, Natal, RN, BrazilUniv Fed Sao Paulo UNIFESP, Inst Sci & Technol ICT, Sao Jose Dos Campos, SP, BrazilUniv Fed Sao Paulo UNIFESP, Inst Sci & Technol ICT, Sao Jose Dos Campos, SP, BrazilWeb of ScienceNational Foundation for Science and Technology Development (CNPq)Assoc Brasil Polimeros2020-07-17T14:02:22Z2020-07-17T14:02:22Z2017info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion122-128application/pdfhttp://dx.doi.org/10.1590/0104-1428.2406Polimeros-Ciencia E Tecnologia. Sao Carlos, v. 27, n. 2, p. 122-128, 2017.10.1590/0104-1428.2406S0104-14282017000200122.pdf0104-1428S0104-14282017000200122https://repositorio.unifesp.br/handle/11600/54765WOS:000407389300005engPolimeros-Ciencia E TecnologiaSao Carlosinfo:eu-repo/semantics/openAccessRivas, Leonardo FabioCasarin, Suzan AlineNepomuceno, Neymara CavalcanteAlencar, Marie IsabeleMarcondes Agnelli, Jose Augustode Medeiros, Eliton SoutoWanderley Neto, Alcides de Oliveirade Oliveira, Mauricio Pinheiro [UNIFESP]de Medeiros, Antonio MarcosFerreira e Santos, Amelia Severinoreponame:Repositório Institucional da UNIFESPinstname:Universidade Federal de São Paulo (UNIFESP)instacron:UNIFESP2024-08-02T01:07:30Zoai:repositorio.unifesp.br/:11600/54765Repositório InstitucionalPUBhttp://www.repositorio.unifesp.br/oai/requestbiblioteca.csp@unifesp.bropendoar:34652024-08-02T01:07:30Repositório Institucional da UNIFESP - Universidade Federal de São Paulo (UNIFESP)false
dc.title.none.fl_str_mv Reprocessability of PHB in extrusion: ATR-FTIR, tensile tests and thermal studies
title Reprocessability of PHB in extrusion: ATR-FTIR, tensile tests and thermal studies
spellingShingle Reprocessability of PHB in extrusion: ATR-FTIR, tensile tests and thermal studies
Rivas, Leonardo Fabio
biopolymer
degradation
PHB
recycling
reprocessing
title_short Reprocessability of PHB in extrusion: ATR-FTIR, tensile tests and thermal studies
title_full Reprocessability of PHB in extrusion: ATR-FTIR, tensile tests and thermal studies
title_fullStr Reprocessability of PHB in extrusion: ATR-FTIR, tensile tests and thermal studies
title_full_unstemmed Reprocessability of PHB in extrusion: ATR-FTIR, tensile tests and thermal studies
title_sort Reprocessability of PHB in extrusion: ATR-FTIR, tensile tests and thermal studies
author Rivas, Leonardo Fabio
author_facet Rivas, Leonardo Fabio
Casarin, Suzan Aline
Nepomuceno, Neymara Cavalcante
Alencar, Marie Isabele
Marcondes Agnelli, Jose Augusto
de Medeiros, Eliton Souto
Wanderley Neto, Alcides de Oliveira
de Oliveira, Mauricio Pinheiro [UNIFESP]
de Medeiros, Antonio Marcos
Ferreira e Santos, Amelia Severino
author_role author
author2 Casarin, Suzan Aline
Nepomuceno, Neymara Cavalcante
Alencar, Marie Isabele
Marcondes Agnelli, Jose Augusto
de Medeiros, Eliton Souto
Wanderley Neto, Alcides de Oliveira
de Oliveira, Mauricio Pinheiro [UNIFESP]
de Medeiros, Antonio Marcos
Ferreira e Santos, Amelia Severino
author2_role author
author
author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Rivas, Leonardo Fabio
Casarin, Suzan Aline
Nepomuceno, Neymara Cavalcante
Alencar, Marie Isabele
Marcondes Agnelli, Jose Augusto
de Medeiros, Eliton Souto
Wanderley Neto, Alcides de Oliveira
de Oliveira, Mauricio Pinheiro [UNIFESP]
de Medeiros, Antonio Marcos
Ferreira e Santos, Amelia Severino
dc.subject.por.fl_str_mv biopolymer
degradation
PHB
recycling
reprocessing
topic biopolymer
degradation
PHB
recycling
reprocessing
description Mechanical recycling of biodegradable plastics has to be encouraged, since the consumption of energy and raw materials can be reduced towards a sustainable development in plastics materials. In this study, the evolution of thermal and mechanical properties, as well as structural changes of poly(hydroxybutyrate) (PHB) up to three extrusion cycles were investigated. Results indicated a significant reduction in mechanical properties already at the second extrusion cycle, with a reduction above 50% in the third cycle. An increase in the crystallinity index was observed due to chemicrystallization process during degradation by chain scission. On the other hand, significant changes in the chemical structure or in thermal stability of PHB cannot be detected by Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analyses (TGA), respectively.
publishDate 2017
dc.date.none.fl_str_mv 2017
2020-07-17T14:02:22Z
2020-07-17T14:02:22Z
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1590/0104-1428.2406
Polimeros-Ciencia E Tecnologia. Sao Carlos, v. 27, n. 2, p. 122-128, 2017.
10.1590/0104-1428.2406
S0104-14282017000200122.pdf
0104-1428
S0104-14282017000200122
https://repositorio.unifesp.br/handle/11600/54765
WOS:000407389300005
url http://dx.doi.org/10.1590/0104-1428.2406
https://repositorio.unifesp.br/handle/11600/54765
identifier_str_mv Polimeros-Ciencia E Tecnologia. Sao Carlos, v. 27, n. 2, p. 122-128, 2017.
10.1590/0104-1428.2406
S0104-14282017000200122.pdf
0104-1428
S0104-14282017000200122
WOS:000407389300005
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Polimeros-Ciencia E Tecnologia
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 122-128
application/pdf
dc.coverage.none.fl_str_mv Sao Carlos
dc.publisher.none.fl_str_mv Assoc Brasil Polimeros
publisher.none.fl_str_mv Assoc Brasil Polimeros
dc.source.none.fl_str_mv reponame:Repositório Institucional da UNIFESP
instname:Universidade Federal de São Paulo (UNIFESP)
instacron:UNIFESP
instname_str Universidade Federal de São Paulo (UNIFESP)
instacron_str UNIFESP
institution UNIFESP
reponame_str Repositório Institucional da UNIFESP
collection Repositório Institucional da UNIFESP
repository.name.fl_str_mv Repositório Institucional da UNIFESP - Universidade Federal de São Paulo (UNIFESP)
repository.mail.fl_str_mv biblioteca.csp@unifesp.br
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