Reprocessability of PHB in extrusion: ATR-FTIR, tensile tests and thermal studies
Autor(a) principal: | |
---|---|
Data de Publicação: | 2017 |
Outros Autores: | , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNIFESP |
Texto Completo: | https://repositorio.unifesp.br/handle/11600/54765 http://dx.doi.org/10.1590/0104-1428.2406 |
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. |
id |
UFSP_b20a270245563e0a5507cbb540085236 |
---|---|
oai_identifier_str |
oai:repositorio.unifesp.br:11600/54765 |
network_acronym_str |
UFSP |
network_name_str |
Repositório Institucional da UNIFESP |
repository_id_str |
3465 |
spelling |
Rivas, 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 Severino2020-07-17T14:02:22Z2020-07-17T14:02:22Z2017Polimeros-Ciencia E Tecnologia. Sao Carlos, v. 27, n. 2, p. 122-128, 2017.0104-1428https://repositorio.unifesp.br/handle/11600/54765http://dx.doi.org/10.1590/0104-1428.2406S0104-14282017000200122.pdfS0104-1428201700020012210.1590/0104-1428.2406WOS:000407389300005Mechanical 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.National Foundation for Science and Technology Development (CNPq)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 Science122-128engAssoc Brasil PolimerosPolimeros-Ciencia E TecnologiabiopolymerdegradationPHBrecyclingreprocessingReprocessability of PHB in extrusion: ATR-FTIR, tensile tests and thermal studiesinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleSao Carlos272info:eu-repo/semantics/openAccessreponame:Repositório Institucional da UNIFESPinstname:Universidade Federal de São Paulo (UNIFESP)instacron:UNIFESPORIGINALS0104-14282017000200122.pdfapplication/pdf1506157${dspace.ui.url}/bitstream/11600/54765/1/S0104-14282017000200122.pdfeff877e8c9a6fce9373355993132db04MD51open accessTEXTS0104-14282017000200122.pdf.txtS0104-14282017000200122.pdf.txtExtracted texttext/plain40576${dspace.ui.url}/bitstream/11600/54765/8/S0104-14282017000200122.pdf.txt37b5443b0a0fe02ca48e1d32e7d5773dMD58open accessTHUMBNAILS0104-14282017000200122.pdf.jpgS0104-14282017000200122.pdf.jpgIM Thumbnailimage/jpeg7061${dspace.ui.url}/bitstream/11600/54765/10/S0104-14282017000200122.pdf.jpge21615a50f5614143d9a09ec20d1fdedMD510open access11600/547652023-06-05 19:06:13.609open accessoai:repositorio.unifesp.br:11600/54765Repositório InstitucionalPUBhttp://www.repositorio.unifesp.br/oai/requestopendoar:34652023-06-05T22:06:13Repositório Institucional da UNIFESP - Universidade Federal de São Paulo (UNIFESP)false |
dc.title.en.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.eng.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.issued.fl_str_mv |
2017 |
dc.date.accessioned.fl_str_mv |
2020-07-17T14:02:22Z |
dc.date.available.fl_str_mv |
2020-07-17T14:02:22Z |
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.citation.fl_str_mv |
Polimeros-Ciencia E Tecnologia. Sao Carlos, v. 27, n. 2, p. 122-128, 2017. |
dc.identifier.uri.fl_str_mv |
https://repositorio.unifesp.br/handle/11600/54765 http://dx.doi.org/10.1590/0104-1428.2406 |
dc.identifier.issn.none.fl_str_mv |
0104-1428 |
dc.identifier.file.none.fl_str_mv |
S0104-14282017000200122.pdf |
dc.identifier.scielo.none.fl_str_mv |
S0104-14282017000200122 |
dc.identifier.doi.none.fl_str_mv |
10.1590/0104-1428.2406 |
dc.identifier.wos.none.fl_str_mv |
WOS:000407389300005 |
identifier_str_mv |
Polimeros-Ciencia E Tecnologia. Sao Carlos, v. 27, n. 2, p. 122-128, 2017. 0104-1428 S0104-14282017000200122.pdf S0104-14282017000200122 10.1590/0104-1428.2406 WOS:000407389300005 |
url |
https://repositorio.unifesp.br/handle/11600/54765 http://dx.doi.org/10.1590/0104-1428.2406 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.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 |
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 |
bitstream.url.fl_str_mv |
${dspace.ui.url}/bitstream/11600/54765/1/S0104-14282017000200122.pdf ${dspace.ui.url}/bitstream/11600/54765/8/S0104-14282017000200122.pdf.txt ${dspace.ui.url}/bitstream/11600/54765/10/S0104-14282017000200122.pdf.jpg |
bitstream.checksum.fl_str_mv |
eff877e8c9a6fce9373355993132db04 37b5443b0a0fe02ca48e1d32e7d5773d e21615a50f5614143d9a09ec20d1fded |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional da UNIFESP - Universidade Federal de São Paulo (UNIFESP) |
repository.mail.fl_str_mv |
|
_version_ |
1783460255553814528 |