Nanostructure and mechanical properties studied during dynamical straining of microfibrillar reinforced HDPE/PA blends
Autor(a) principal: | |
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Data de Publicação: | 2010 |
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/1822/13463 |
Resumo: | Oriented polymer blends based on high-density polyethylene (HDPE) are strained until failure. Twodimensional (2D) small-angle X-ray scattering patterns monitor the nanostructure evolution. Data evaluation methods for high-precision determination of macroscopic mechanical and nanoscopic structure parameters are presented. The hardest materials exhibit a very inhomogeneous nanodomain structure. During straining their domains appear to be wedged together and inhibit transverse contraction on the nanometer scale. Further components are polyamides (PA6, PA12) (20–30%) and as compatibilizer Yparex® 8102 (YP) (0–10%). Some HDPE/PA6 blends are additionally loaded with nanoclays (Nanomer® or Cloisite®). Blending of HDPE with PA12 causes no synergistic effect. In the absence of nanoclay, PA6 and HDPE form a heterogeneous nanostructure with high Young’s modulus. After addition of YP a more homogeneous scaffold structure is observed in which some of the PA6 microfibrils and HDPE crystallites appear to be rigidly connected, but the modulus has decreased. Both kinds of nanoclay induce a transition from a structure without transverse correlation among the microfibrils into a macrolattice with 3D correlations among HDPE domains from neighboring microfibrils. For extensions between 0.7% and 3.5% the scattering entities with 3D correlation exhibit transverse elongation instead of transverse contraction. The process is interpreted as overcoming a correlation barrier executed by the crystallites in an evasion-upon-approaching mechanism. During continued straining the 3D correlation is reduced or removed. |
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Nanostructure and mechanical properties studied during dynamical straining of microfibrillar reinforced HDPE/PA blendsBlendsClayDrawingNanocompositesStructure-property relationsSAXSScience & TechnologyOriented polymer blends based on high-density polyethylene (HDPE) are strained until failure. Twodimensional (2D) small-angle X-ray scattering patterns monitor the nanostructure evolution. Data evaluation methods for high-precision determination of macroscopic mechanical and nanoscopic structure parameters are presented. The hardest materials exhibit a very inhomogeneous nanodomain structure. During straining their domains appear to be wedged together and inhibit transverse contraction on the nanometer scale. Further components are polyamides (PA6, PA12) (20–30%) and as compatibilizer Yparex® 8102 (YP) (0–10%). Some HDPE/PA6 blends are additionally loaded with nanoclays (Nanomer® or Cloisite®). Blending of HDPE with PA12 causes no synergistic effect. In the absence of nanoclay, PA6 and HDPE form a heterogeneous nanostructure with high Young’s modulus. After addition of YP a more homogeneous scaffold structure is observed in which some of the PA6 microfibrils and HDPE crystallites appear to be rigidly connected, but the modulus has decreased. Both kinds of nanoclay induce a transition from a structure without transverse correlation among the microfibrils into a macrolattice with 3D correlations among HDPE domains from neighboring microfibrils. For extensions between 0.7% and 3.5% the scattering entities with 3D correlation exhibit transverse elongation instead of transverse contraction. The process is interpreted as overcoming a correlation barrier executed by the crystallites in an evasion-upon-approaching mechanism. During continued straining the 3D correlation is reduced or removed.SFRH/BSAB/812/2008WileyUniversidade do MinhoDenchev, Z.Dencheva, Nadya VasilevaFunari, S. S.Motovilin, M.Schubert, TomStribeck, N.2010-022010-02-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/13463eng0887-626610.1002/polb.21853http://onlinelibrary.wiley.com/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:RCAAP2023-07-21T12:48:45Zoai:repositorium.sdum.uminho.pt:1822/13463Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:47:05.020059Repositório 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 |
Nanostructure and mechanical properties studied during dynamical straining of microfibrillar reinforced HDPE/PA blends |
title |
Nanostructure and mechanical properties studied during dynamical straining of microfibrillar reinforced HDPE/PA blends |
spellingShingle |
Nanostructure and mechanical properties studied during dynamical straining of microfibrillar reinforced HDPE/PA blends Denchev, Z. Blends Clay Drawing Nanocomposites Structure-property relations SAXS Science & Technology |
title_short |
Nanostructure and mechanical properties studied during dynamical straining of microfibrillar reinforced HDPE/PA blends |
title_full |
Nanostructure and mechanical properties studied during dynamical straining of microfibrillar reinforced HDPE/PA blends |
title_fullStr |
Nanostructure and mechanical properties studied during dynamical straining of microfibrillar reinforced HDPE/PA blends |
title_full_unstemmed |
Nanostructure and mechanical properties studied during dynamical straining of microfibrillar reinforced HDPE/PA blends |
title_sort |
Nanostructure and mechanical properties studied during dynamical straining of microfibrillar reinforced HDPE/PA blends |
author |
Denchev, Z. |
author_facet |
Denchev, Z. Dencheva, Nadya Vasileva Funari, S. S. Motovilin, M. Schubert, Tom Stribeck, N. |
author_role |
author |
author2 |
Dencheva, Nadya Vasileva Funari, S. S. Motovilin, M. Schubert, Tom Stribeck, N. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Denchev, Z. Dencheva, Nadya Vasileva Funari, S. S. Motovilin, M. Schubert, Tom Stribeck, N. |
dc.subject.por.fl_str_mv |
Blends Clay Drawing Nanocomposites Structure-property relations SAXS Science & Technology |
topic |
Blends Clay Drawing Nanocomposites Structure-property relations SAXS Science & Technology |
description |
Oriented polymer blends based on high-density polyethylene (HDPE) are strained until failure. Twodimensional (2D) small-angle X-ray scattering patterns monitor the nanostructure evolution. Data evaluation methods for high-precision determination of macroscopic mechanical and nanoscopic structure parameters are presented. The hardest materials exhibit a very inhomogeneous nanodomain structure. During straining their domains appear to be wedged together and inhibit transverse contraction on the nanometer scale. Further components are polyamides (PA6, PA12) (20–30%) and as compatibilizer Yparex® 8102 (YP) (0–10%). Some HDPE/PA6 blends are additionally loaded with nanoclays (Nanomer® or Cloisite®). Blending of HDPE with PA12 causes no synergistic effect. In the absence of nanoclay, PA6 and HDPE form a heterogeneous nanostructure with high Young’s modulus. After addition of YP a more homogeneous scaffold structure is observed in which some of the PA6 microfibrils and HDPE crystallites appear to be rigidly connected, but the modulus has decreased. Both kinds of nanoclay induce a transition from a structure without transverse correlation among the microfibrils into a macrolattice with 3D correlations among HDPE domains from neighboring microfibrils. For extensions between 0.7% and 3.5% the scattering entities with 3D correlation exhibit transverse elongation instead of transverse contraction. The process is interpreted as overcoming a correlation barrier executed by the crystallites in an evasion-upon-approaching mechanism. During continued straining the 3D correlation is reduced or removed. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-02 2010-02-01T00:00:00Z |
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/1822/13463 |
url |
http://hdl.handle.net/1822/13463 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0887-6266 10.1002/polb.21853 http://onlinelibrary.wiley.com/ |
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 |
Wiley |
publisher.none.fl_str_mv |
Wiley |
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 |
instacron_str |
RCAAP |
institution |
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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1799133042311168000 |