Ellagic acid as stabilizer in the thermo-oxidative degradation of thermoplastic polyurethane
Autor(a) principal: | |
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Data de Publicação: | 2023 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10773/40510 |
Resumo: | Ellagic acid (EA) is a plant polyphenol with strong antioxidant properties. The stabilizing effect of EA on the thermo-oxidative degradation of the commercial thermoplastic poly(ester-ether urethane) (TPU) was studied for the first time and compared with effect of kraft lignin (KL), butylated hydroxytoluene (BHT) and pentaerythritol tetrakis (Irganox 1010). TPUs doped with antioxidants (ca. 20,000 ppm), were analysed for their oxidation induction time (OIT) at 200 °C and the oxidation onset temperature (OOT). The extent of TPU degradation with and without addition of antioxidants was studied by head space-gas chromatography-mass spectrometry (HS-GC-MS) at 200 °C under aerobic atmosphere. The highest stabilizing effect of EA was attributed primarily to its stronger antioxidant capacity when compared to KL and synthetic polyphenolic antioxidants (BHT and Irganox), which was corroborated by antiradical power studies with 2,2-diphenyl-1-picrylhydrazyl (DPPH). The analysis of the volatile products released under thermo-oxidative degradation showed the suppressive effect of EA on the thermally induced depolymerization of TPU occurring via homolysis. Furthermore, it has also been proposed that EA affects TPU degradation with the cleavage of urethane bonds in carbamates due to eventual coordination with the intermediate cyclic intramolecular transition complex involved in thermally induced depolymerization. Further studies in this area can prompt the performance improvements of TPU products, allowing them to be used in a wider range of durable goods applications. |
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Ellagic acid as stabilizer in the thermo-oxidative degradation of thermoplastic polyurethaneLigninEllagic acidThermoplastic polyurethaneAntioxidantThermo-oxidative degradationDPPHHS-GC/MSEllagic acid (EA) is a plant polyphenol with strong antioxidant properties. The stabilizing effect of EA on the thermo-oxidative degradation of the commercial thermoplastic poly(ester-ether urethane) (TPU) was studied for the first time and compared with effect of kraft lignin (KL), butylated hydroxytoluene (BHT) and pentaerythritol tetrakis (Irganox 1010). TPUs doped with antioxidants (ca. 20,000 ppm), were analysed for their oxidation induction time (OIT) at 200 °C and the oxidation onset temperature (OOT). The extent of TPU degradation with and without addition of antioxidants was studied by head space-gas chromatography-mass spectrometry (HS-GC-MS) at 200 °C under aerobic atmosphere. The highest stabilizing effect of EA was attributed primarily to its stronger antioxidant capacity when compared to KL and synthetic polyphenolic antioxidants (BHT and Irganox), which was corroborated by antiradical power studies with 2,2-diphenyl-1-picrylhydrazyl (DPPH). The analysis of the volatile products released under thermo-oxidative degradation showed the suppressive effect of EA on the thermally induced depolymerization of TPU occurring via homolysis. Furthermore, it has also been proposed that EA affects TPU degradation with the cleavage of urethane bonds in carbamates due to eventual coordination with the intermediate cyclic intramolecular transition complex involved in thermally induced depolymerization. Further studies in this area can prompt the performance improvements of TPU products, allowing them to be used in a wider range of durable goods applications.Elsevier2024-02-02T17:30:49Z2023-09-01T00:00:00Z2023-09info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/40510eng0141-391010.1016/j.polymdegradstab.2023.110456Gama, NunoEvtyugin, Dmitry D.Lourenço, AnaLopes, CéliaEvtuguin, Dmitry V.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-02-22T12:19:45Zoai:ria.ua.pt:10773/40510Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:10:37.518189Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Ellagic acid as stabilizer in the thermo-oxidative degradation of thermoplastic polyurethane |
title |
Ellagic acid as stabilizer in the thermo-oxidative degradation of thermoplastic polyurethane |
spellingShingle |
Ellagic acid as stabilizer in the thermo-oxidative degradation of thermoplastic polyurethane Gama, Nuno Lignin Ellagic acid Thermoplastic polyurethane Antioxidant Thermo-oxidative degradation DPPH HS-GC/MS |
title_short |
Ellagic acid as stabilizer in the thermo-oxidative degradation of thermoplastic polyurethane |
title_full |
Ellagic acid as stabilizer in the thermo-oxidative degradation of thermoplastic polyurethane |
title_fullStr |
Ellagic acid as stabilizer in the thermo-oxidative degradation of thermoplastic polyurethane |
title_full_unstemmed |
Ellagic acid as stabilizer in the thermo-oxidative degradation of thermoplastic polyurethane |
title_sort |
Ellagic acid as stabilizer in the thermo-oxidative degradation of thermoplastic polyurethane |
author |
Gama, Nuno |
author_facet |
Gama, Nuno Evtyugin, Dmitry D. Lourenço, Ana Lopes, Célia Evtuguin, Dmitry V. |
author_role |
author |
author2 |
Evtyugin, Dmitry D. Lourenço, Ana Lopes, Célia Evtuguin, Dmitry V. |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Gama, Nuno Evtyugin, Dmitry D. Lourenço, Ana Lopes, Célia Evtuguin, Dmitry V. |
dc.subject.por.fl_str_mv |
Lignin Ellagic acid Thermoplastic polyurethane Antioxidant Thermo-oxidative degradation DPPH HS-GC/MS |
topic |
Lignin Ellagic acid Thermoplastic polyurethane Antioxidant Thermo-oxidative degradation DPPH HS-GC/MS |
description |
Ellagic acid (EA) is a plant polyphenol with strong antioxidant properties. The stabilizing effect of EA on the thermo-oxidative degradation of the commercial thermoplastic poly(ester-ether urethane) (TPU) was studied for the first time and compared with effect of kraft lignin (KL), butylated hydroxytoluene (BHT) and pentaerythritol tetrakis (Irganox 1010). TPUs doped with antioxidants (ca. 20,000 ppm), were analysed for their oxidation induction time (OIT) at 200 °C and the oxidation onset temperature (OOT). The extent of TPU degradation with and without addition of antioxidants was studied by head space-gas chromatography-mass spectrometry (HS-GC-MS) at 200 °C under aerobic atmosphere. The highest stabilizing effect of EA was attributed primarily to its stronger antioxidant capacity when compared to KL and synthetic polyphenolic antioxidants (BHT and Irganox), which was corroborated by antiradical power studies with 2,2-diphenyl-1-picrylhydrazyl (DPPH). The analysis of the volatile products released under thermo-oxidative degradation showed the suppressive effect of EA on the thermally induced depolymerization of TPU occurring via homolysis. Furthermore, it has also been proposed that EA affects TPU degradation with the cleavage of urethane bonds in carbamates due to eventual coordination with the intermediate cyclic intramolecular transition complex involved in thermally induced depolymerization. Further studies in this area can prompt the performance improvements of TPU products, allowing them to be used in a wider range of durable goods applications. |
publishDate |
2023 |
dc.date.none.fl_str_mv |
2023-09-01T00:00:00Z 2023-09 2024-02-02T17:30:49Z |
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://hdl.handle.net/10773/40510 |
url |
http://hdl.handle.net/10773/40510 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0141-3910 10.1016/j.polymdegradstab.2023.110456 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799137757199597568 |