The influence of melt mixing on the stability of cellulose acetate and its carbon nanotube composites

Detalhes bibliográficos
Autor(a) principal: Lima, Ana Luísa Delgado
Data de Publicação: 2016
Outros Autores: Paiva, M. C., Machado, A. V.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/1822/51409
Resumo: Cellulose derivatives, such as cellulose acetate (CA), are commonly used due to their ease of processing. These polymers present interesting mechanical properties and biodegradability, but low thermal stability under melt processing conditions. Composites of carbon nanotubes (CNTs) and cellulose derivatives are expected to present enhanced properties, depending on the effect of nanotubes on polymer structure and thermal properties. This work aims to investigate the influence of melt mixing on the stability of CA and its CNT composites. Composites with 0 wt%, 0.1 wt% and 0.5 wt% CNTs, as received and functionalized with pyrrolidine groups, were prepared using a batch mixer and an extruder. Chain scission of CA occurred during processing, but the effect was considerably reduced in the presence of CNTs. The incorporation of small amounts of CNTs (with or without functionalization) decreased polymer degradation by thermomechanical effects induced during polymer processing.
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spelling The influence of melt mixing on the stability of cellulose acetate and its carbon nanotube compositesCarbon nanotubesFunctionalizationThermal propertiesDegradationEngenharia e Tecnologia::Engenharia dos MateriaisScience & TechnologyCellulose derivatives, such as cellulose acetate (CA), are commonly used due to their ease of processing. These polymers present interesting mechanical properties and biodegradability, but low thermal stability under melt processing conditions. Composites of carbon nanotubes (CNTs) and cellulose derivatives are expected to present enhanced properties, depending on the effect of nanotubes on polymer structure and thermal properties. This work aims to investigate the influence of melt mixing on the stability of CA and its CNT composites. Composites with 0 wt%, 0.1 wt% and 0.5 wt% CNTs, as received and functionalized with pyrrolidine groups, were prepared using a batch mixer and an extruder. Chain scission of CA occurred during processing, but the effect was considerably reduced in the presence of CNTs. The incorporation of small amounts of CNTs (with or without functionalization) decreased polymer degradation by thermomechanical effects induced during polymer processing.The authors acknowledge the Portuguese Foundation for Science and Technology (SFRH/ BD/81711/2011) and n-STeP – Nanostructured systems for Tailored Properties, with reference NORTE-07-0124- FEDER-000039, supported by the Programa Operacional Regional do Norte (ON.2).info:eu-repo/semantics/publishedVersionWalter de Gruyter GmbHUniversidade do MinhoLima, Ana Luísa DelgadoPaiva, M. C.Machado, A. V.20162016-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/51409eng2191-034010.1515/polyeng-2015-0388info: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:RCAAP2023-07-21T12:25:53Zoai:repositorium.sdum.uminho.pt:1822/51409Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:20:12.159023Repositório 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 The influence of melt mixing on the stability of cellulose acetate and its carbon nanotube composites
title The influence of melt mixing on the stability of cellulose acetate and its carbon nanotube composites
spellingShingle The influence of melt mixing on the stability of cellulose acetate and its carbon nanotube composites
Lima, Ana Luísa Delgado
Carbon nanotubes
Functionalization
Thermal properties
Degradation
Engenharia e Tecnologia::Engenharia dos Materiais
Science & Technology
title_short The influence of melt mixing on the stability of cellulose acetate and its carbon nanotube composites
title_full The influence of melt mixing on the stability of cellulose acetate and its carbon nanotube composites
title_fullStr The influence of melt mixing on the stability of cellulose acetate and its carbon nanotube composites
title_full_unstemmed The influence of melt mixing on the stability of cellulose acetate and its carbon nanotube composites
title_sort The influence of melt mixing on the stability of cellulose acetate and its carbon nanotube composites
author Lima, Ana Luísa Delgado
author_facet Lima, Ana Luísa Delgado
Paiva, M. C.
Machado, A. V.
author_role author
author2 Paiva, M. C.
Machado, A. V.
author2_role author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Lima, Ana Luísa Delgado
Paiva, M. C.
Machado, A. V.
dc.subject.por.fl_str_mv Carbon nanotubes
Functionalization
Thermal properties
Degradation
Engenharia e Tecnologia::Engenharia dos Materiais
Science & Technology
topic Carbon nanotubes
Functionalization
Thermal properties
Degradation
Engenharia e Tecnologia::Engenharia dos Materiais
Science & Technology
description Cellulose derivatives, such as cellulose acetate (CA), are commonly used due to their ease of processing. These polymers present interesting mechanical properties and biodegradability, but low thermal stability under melt processing conditions. Composites of carbon nanotubes (CNTs) and cellulose derivatives are expected to present enhanced properties, depending on the effect of nanotubes on polymer structure and thermal properties. This work aims to investigate the influence of melt mixing on the stability of CA and its CNT composites. Composites with 0 wt%, 0.1 wt% and 0.5 wt% CNTs, as received and functionalized with pyrrolidine groups, were prepared using a batch mixer and an extruder. Chain scission of CA occurred during processing, but the effect was considerably reduced in the presence of CNTs. The incorporation of small amounts of CNTs (with or without functionalization) decreased polymer degradation by thermomechanical effects induced during polymer processing.
publishDate 2016
dc.date.none.fl_str_mv 2016
2016-01-01T00:00:00Z
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/1822/51409
url http://hdl.handle.net/1822/51409
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 2191-0340
10.1515/polyeng-2015-0388
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 Walter de Gruyter GmbH
publisher.none.fl_str_mv Walter de Gruyter GmbH
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
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
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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
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