Reprocessability of PHB in extrusion: ATR-FTIR, tensile tests and thermal studies
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , , , , , , |
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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Repositório Institucional da UNIFESP |
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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 |
_version_ |
1814268270706950144 |