Melt-mixed nanocomposites of SIS/MWCNT: rheological, electrical and structural behavior
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , |
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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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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1754212591280848896 |