Melt-mixed nanocomposites of SIS/MWCNT: rheological, electrical and structural behavior

Detalhes bibliográficos
Autor(a) principal: Ferreira,Ludimilla Barbosa
Data de Publicação: 2020
Outros Autores: Fernandes,Rayane de Souza, Bretas,Rosario Elida Suman, Santos,João Paulo Ferreira
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Polímeros (São Carlos. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282020000400404
Resumo: Abstract In this work, nanocomposites based on the triblock copolymer polystyrene-b-polyisoprene-b-polystyrene (SIS) thermoplastic elastomer filled with multiwall carbon nanotubes (MWCNT) were obtained by melt mixing. The nanocomposites were characterized by oscillatory rheometry, electrical resistivity, small angle x-ray scattering (SAXS) and transmission electron microscopy (TEM). The results showed that both, rheological and electrical percolation were achieved at MWCNT loadings between 1-3 vol.%. Rheological tests revealed that the insertion of MWCNT into SIS significantly enhanced the process of relaxation of SIS blocks. Resistivity measurements revealed that conductive nanocomposites were obtained at MWCNT loadings ~1.6 vol.%. The electrical resistivity decreased eleven orders of magnitude from neat SIS to SIS/ 5 vol.% MWCNT. Finally, SAXS and TEM showed that the melt mixing process and the presence of MWCNT hampered the self-assembly of SIS into well-ordered domains.
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spelling Melt-mixed nanocomposites of SIS/MWCNT: rheological, electrical and structural behaviorSISMWCNTrheological percolationelectrical percolationself-assemblyAbstract In this work, nanocomposites based on the triblock copolymer polystyrene-b-polyisoprene-b-polystyrene (SIS) thermoplastic elastomer filled with multiwall carbon nanotubes (MWCNT) were obtained by melt mixing. The nanocomposites were characterized by oscillatory rheometry, electrical resistivity, small angle x-ray scattering (SAXS) and transmission electron microscopy (TEM). The results showed that both, rheological and electrical percolation were achieved at MWCNT loadings between 1-3 vol.%. Rheological tests revealed that the insertion of MWCNT into SIS significantly enhanced the process of relaxation of SIS blocks. Resistivity measurements revealed that conductive nanocomposites were obtained at MWCNT loadings ~1.6 vol.%. The electrical resistivity decreased eleven orders of magnitude from neat SIS to SIS/ 5 vol.% MWCNT. Finally, SAXS and TEM showed that the melt mixing process and the presence of MWCNT hampered the self-assembly of SIS into well-ordered domains.Associação Brasileira de Polímeros2020-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282020000400404Polímeros v.30 n.4 2020reponame:Polímeros (São Carlos. Online)instname:Associação Brasileira de Polímeros (ABPol)instacron:ABPO10.1590/0104-1428.08220info:eu-repo/semantics/openAccessFerreira,Ludimilla BarbosaFernandes,Rayane de SouzaBretas,Rosario Elida SumanSantos,João Paulo Ferreiraeng2021-03-09T00:00:00Zoai:scielo:S0104-14282020000400404Revistahttp://www.scielo.br/pohttps://old.scielo.br/oai/scielo-oai.php||revista@abpol.org.br1678-51690104-1428opendoar:2021-03-09T00:00Polímeros (São Carlos. Online) - Associação Brasileira de Polímeros (ABPol)false
dc.title.none.fl_str_mv Melt-mixed nanocomposites of SIS/MWCNT: rheological, electrical and structural behavior
title Melt-mixed nanocomposites of SIS/MWCNT: rheological, electrical and structural behavior
spellingShingle Melt-mixed nanocomposites of SIS/MWCNT: rheological, electrical and structural behavior
Ferreira,Ludimilla Barbosa
SIS
MWCNT
rheological percolation
electrical percolation
self-assembly
title_short Melt-mixed nanocomposites of SIS/MWCNT: rheological, electrical and structural behavior
title_full Melt-mixed nanocomposites of SIS/MWCNT: rheological, electrical and structural behavior
title_fullStr Melt-mixed nanocomposites of SIS/MWCNT: rheological, electrical and structural behavior
title_full_unstemmed Melt-mixed nanocomposites of SIS/MWCNT: rheological, electrical and structural behavior
title_sort Melt-mixed nanocomposites of SIS/MWCNT: rheological, electrical and structural behavior
author Ferreira,Ludimilla Barbosa
author_facet Ferreira,Ludimilla Barbosa
Fernandes,Rayane de Souza
Bretas,Rosario Elida Suman
Santos,João Paulo Ferreira
author_role author
author2 Fernandes,Rayane de Souza
Bretas,Rosario Elida Suman
Santos,João Paulo Ferreira
author2_role author
author
author
dc.contributor.author.fl_str_mv Ferreira,Ludimilla Barbosa
Fernandes,Rayane de Souza
Bretas,Rosario Elida Suman
Santos,João Paulo Ferreira
dc.subject.por.fl_str_mv SIS
MWCNT
rheological percolation
electrical percolation
self-assembly
topic SIS
MWCNT
rheological percolation
electrical percolation
self-assembly
description Abstract In this work, nanocomposites based on the triblock copolymer polystyrene-b-polyisoprene-b-polystyrene (SIS) thermoplastic elastomer filled with multiwall carbon nanotubes (MWCNT) were obtained by melt mixing. The nanocomposites were characterized by oscillatory rheometry, electrical resistivity, small angle x-ray scattering (SAXS) and transmission electron microscopy (TEM). The results showed that both, rheological and electrical percolation were achieved at MWCNT loadings between 1-3 vol.%. Rheological tests revealed that the insertion of MWCNT into SIS significantly enhanced the process of relaxation of SIS blocks. Resistivity measurements revealed that conductive nanocomposites were obtained at MWCNT loadings ~1.6 vol.%. The electrical resistivity decreased eleven orders of magnitude from neat SIS to SIS/ 5 vol.% MWCNT. Finally, SAXS and TEM showed that the melt mixing process and the presence of MWCNT hampered the self-assembly of SIS into well-ordered domains.
publishDate 2020
dc.date.none.fl_str_mv 2020-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282020000400404
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282020000400404
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/0104-1428.08220
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Associação Brasileira de Polímeros
publisher.none.fl_str_mv Associação Brasileira de Polímeros
dc.source.none.fl_str_mv Polímeros v.30 n.4 2020
reponame:Polímeros (São Carlos. Online)
instname:Associação Brasileira de Polímeros (ABPol)
instacron:ABPO
instname_str Associação Brasileira de Polímeros (ABPol)
instacron_str ABPO
institution ABPO
reponame_str Polímeros (São Carlos. Online)
collection Polímeros (São Carlos. Online)
repository.name.fl_str_mv Polímeros (São Carlos. Online) - Associação Brasileira de Polímeros (ABPol)
repository.mail.fl_str_mv ||revista@abpol.org.br
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