Structure–properties relationship in single polymer composites based on polyamide 6 prepared by in-mold anionic polymerization

Detalhes bibliográficos
Autor(a) principal: Dencheva, Nadya Vasileva
Data de Publicação: 2013
Outros Autores: Denchev, Z., Pouzada, A. S., Sampaio, Ana Sofia, Rocha, A. M.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/1822/25079
Resumo: Single polymer composites (SPCs) based on polyamide 6 (PA6) were prepared by in-mold activated anionic ring-opening polymerization (AAROP) of capro- lactam in the presence of PA6 textile fibers. The influence of the reinforcing fibers content, their surface treatment, as well as of the temperature of AAROP upon the morphol- ogy, crystalline structure, and mechanical properties of the resulting SPCs was followed. The presence of oriented transcrystalline layer (TCL) on the surface of the rein- forcing fibers was demonstrated by means of microscopy methods. Its orientation and polymorph structure were determined by synchrotron wide-angle X-ray scattering. Studies on the mechanical behavior in tension of the SPCs showed a well-expressed growth of the stress at break (70–80 %) and deformation at break (up to 150–190 %) in composites with 15–20 wt% of reinforcements. The best mechanical properties were found in SPCs whose rein- forcing fibers were solvent-pretreated prior to AAROP in order to remove the original finish. In these samples a stronger adhesion at the fiber/matrix interface was proved by scanning electron microscopy of cryofractured samples. This effect was related to a thinner TCL in which the α-to-γ polymorph transition is impeded.
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spelling Structure–properties relationship in single polymer composites based on polyamide 6 prepared by in-mold anionic polymerizationAnionic polymerizationSingle-polymer compositesMechanical propertiesPolymorph transitions in polyamidesX-ray scatteringStructure-properties relationshipScience & TechnologySingle polymer composites (SPCs) based on polyamide 6 (PA6) were prepared by in-mold activated anionic ring-opening polymerization (AAROP) of capro- lactam in the presence of PA6 textile fibers. The influence of the reinforcing fibers content, their surface treatment, as well as of the temperature of AAROP upon the morphol- ogy, crystalline structure, and mechanical properties of the resulting SPCs was followed. The presence of oriented transcrystalline layer (TCL) on the surface of the rein- forcing fibers was demonstrated by means of microscopy methods. Its orientation and polymorph structure were determined by synchrotron wide-angle X-ray scattering. Studies on the mechanical behavior in tension of the SPCs showed a well-expressed growth of the stress at break (70–80 %) and deformation at break (up to 150–190 %) in composites with 15–20 wt% of reinforcements. The best mechanical properties were found in SPCs whose rein- forcing fibers were solvent-pretreated prior to AAROP in order to remove the original finish. In these samples a stronger adhesion at the fiber/matrix interface was proved by scanning electron microscopy of cryofractured samples. This effect was related to a thinner TCL in which the α-to-γ polymorph transition is impeded.Strategic Project LA 25-2011-2012 financed by Fundação para a Ciência e a Tecnologia (FCT) - PortugalHASYLAB at DESY (Grant Number II-07- 011EC)FCT post-doctoral award SFRH/BPD/45252/2008, co-financed by QREN-POPH program of EU.SpringerUniversidade do MinhoDencheva, Nadya VasilevaDenchev, Z.Pouzada, A. S.Sampaio, Ana SofiaRocha, A. M.20132013-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/25079eng0022-246110.1007/s10853-013-7546-8http://link.springer.com/article/10.1007/s10853-013-7546-8info: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:RCAAP2023-07-21T12:49:17Zoai:repositorium.sdum.uminho.pt:1822/25079Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:47:43.201666Repositório 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 Structure–properties relationship in single polymer composites based on polyamide 6 prepared by in-mold anionic polymerization
title Structure–properties relationship in single polymer composites based on polyamide 6 prepared by in-mold anionic polymerization
spellingShingle Structure–properties relationship in single polymer composites based on polyamide 6 prepared by in-mold anionic polymerization
Dencheva, Nadya Vasileva
Anionic polymerization
Single-polymer composites
Mechanical properties
Polymorph transitions in polyamides
X-ray scattering
Structure-properties relationship
Science & Technology
title_short Structure–properties relationship in single polymer composites based on polyamide 6 prepared by in-mold anionic polymerization
title_full Structure–properties relationship in single polymer composites based on polyamide 6 prepared by in-mold anionic polymerization
title_fullStr Structure–properties relationship in single polymer composites based on polyamide 6 prepared by in-mold anionic polymerization
title_full_unstemmed Structure–properties relationship in single polymer composites based on polyamide 6 prepared by in-mold anionic polymerization
title_sort Structure–properties relationship in single polymer composites based on polyamide 6 prepared by in-mold anionic polymerization
author Dencheva, Nadya Vasileva
author_facet Dencheva, Nadya Vasileva
Denchev, Z.
Pouzada, A. S.
Sampaio, Ana Sofia
Rocha, A. M.
author_role author
author2 Denchev, Z.
Pouzada, A. S.
Sampaio, Ana Sofia
Rocha, A. M.
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Dencheva, Nadya Vasileva
Denchev, Z.
Pouzada, A. S.
Sampaio, Ana Sofia
Rocha, A. M.
dc.subject.por.fl_str_mv Anionic polymerization
Single-polymer composites
Mechanical properties
Polymorph transitions in polyamides
X-ray scattering
Structure-properties relationship
Science & Technology
topic Anionic polymerization
Single-polymer composites
Mechanical properties
Polymorph transitions in polyamides
X-ray scattering
Structure-properties relationship
Science & Technology
description Single polymer composites (SPCs) based on polyamide 6 (PA6) were prepared by in-mold activated anionic ring-opening polymerization (AAROP) of capro- lactam in the presence of PA6 textile fibers. The influence of the reinforcing fibers content, their surface treatment, as well as of the temperature of AAROP upon the morphol- ogy, crystalline structure, and mechanical properties of the resulting SPCs was followed. The presence of oriented transcrystalline layer (TCL) on the surface of the rein- forcing fibers was demonstrated by means of microscopy methods. Its orientation and polymorph structure were determined by synchrotron wide-angle X-ray scattering. Studies on the mechanical behavior in tension of the SPCs showed a well-expressed growth of the stress at break (70–80 %) and deformation at break (up to 150–190 %) in composites with 15–20 wt% of reinforcements. The best mechanical properties were found in SPCs whose rein- forcing fibers were solvent-pretreated prior to AAROP in order to remove the original finish. In these samples a stronger adhesion at the fiber/matrix interface was proved by scanning electron microscopy of cryofractured samples. This effect was related to a thinner TCL in which the α-to-γ polymorph transition is impeded.
publishDate 2013
dc.date.none.fl_str_mv 2013
2013-01-01T00:00:00Z
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/1822/25079
url http://hdl.handle.net/1822/25079
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 0022-2461
10.1007/s10853-013-7546-8
http://link.springer.com/article/10.1007/s10853-013-7546-8
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dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
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