From spherical micelles to hexagonally packed cylinders: the cure cycle determines nanostructures generated in block copolymer/ epoxy blends

Autores
Romeo, Hernan Esteban; Zucchi, Ileana Alicia; Rico, Maite; Hoppe, Cristina Elena; Williams, Roberto Juan Jose
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Block copolymer (BCP)/epoxy blends have been intensively investigated during the past decade. Macrophase separation of the BCP in the cured thermoset is avoided by selecting one block that is initially immiscible or that phase separates early in the polymerization and another block that remains miscible up to high conversions. But the quality of the thermoset as a solvent of the miscible block varies along the cure cycle with both conversion and temperature. It shifts from a good solvent to a poor solvent, and eventually to a nonsolvent, by increasing conversion mainly due to the increase in the average molar mass before gelation and the cross-link density after gelation. It also changes with temperature due to the corresponding variation of the interaction parameter. Therefore, for a constant BCP concentration different nanostructures might be accessed and fixed by changing the cure cycle. This can be of interest to modulate final properties of the material (e.g., toughness, transparency, etc.). The selected system to prove this concept was a solution of 20 wt % PS-b-PMMA (Mn = 67 100, ΦPS = 0.69) in a stoichiometric mixture of diglycidyl ether of bisphenol A (DGEBA) and 4,4′- methylenebis(2,6-diethylaniline) (MDEA). Generated nanostructures varied with the selected cure cycle from a dispersion of spherical micelles to a dual morphology consisting of domains of hexagonally packed cylinders and regions with a dispersion of spherical micelles. This produced changes in transparency and in dynamic-mechanical properties of the resulting nanocomposites.
Fil: Romeo, Hernan Esteban. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigación en Ciencia y Tecnología de Materiales (i); Argentina. Universidad Nacional de Mar del Plata. Facultad de Ingenieria; Argentina
Fil: Zucchi, Ileana Alicia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigación en Ciencia y Tecnología de Materiales (i); Argentina. Universidad Nacional de Mar del Plata. Facultad de Ingenieria; Argentina
Fil: Rico, Maite. Universidad da Coruña; España
Fil: Hoppe, Cristina Elena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigación en Ciencia y Tecnología de Materiales (i); Argentina. Universidad Nacional de Mar del Plata. Facultad de Ingenieria; Argentina
Fil: Williams, Roberto Juan Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigación en Ciencia y Tecnología de Materiales (i); Argentina. Universidad Nacional de Mar del Plata. Facultad de Ingenieria; Argentina
Materia
Epoxy
Block Copolymer
Micelles
Nanoestructures
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/2651
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/2651
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling From spherical micelles to hexagonally packed cylinders: the cure cycle determines nanostructures generated in block copolymer/ epoxy blendsRomeo, Hernan EstebanZucchi, Ileana AliciaRico, MaiteHoppe, Cristina ElenaWilliams, Roberto Juan JoseEpoxyBlock CopolymerMicellesNanoestructureshttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1https://purl.org/becyt/ford/2.10https://purl.org/becyt/ford/2Block copolymer (BCP)/epoxy blends have been intensively investigated during the past decade. Macrophase separation of the BCP in the cured thermoset is avoided by selecting one block that is initially immiscible or that phase separates early in the polymerization and another block that remains miscible up to high conversions. But the quality of the thermoset as a solvent of the miscible block varies along the cure cycle with both conversion and temperature. It shifts from a good solvent to a poor solvent, and eventually to a nonsolvent, by increasing conversion mainly due to the increase in the average molar mass before gelation and the cross-link density after gelation. It also changes with temperature due to the corresponding variation of the interaction parameter. Therefore, for a constant BCP concentration different nanostructures might be accessed and fixed by changing the cure cycle. This can be of interest to modulate final properties of the material (e.g., toughness, transparency, etc.). The selected system to prove this concept was a solution of 20 wt % PS-b-PMMA (Mn = 67 100, ΦPS = 0.69) in a stoichiometric mixture of diglycidyl ether of bisphenol A (DGEBA) and 4,4′- methylenebis(2,6-diethylaniline) (MDEA). Generated nanostructures varied with the selected cure cycle from a dispersion of spherical micelles to a dual morphology consisting of domains of hexagonally packed cylinders and regions with a dispersion of spherical micelles. This produced changes in transparency and in dynamic-mechanical properties of the resulting nanocomposites.Fil: Romeo, Hernan Esteban. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigación en Ciencia y Tecnología de Materiales (i); Argentina. Universidad Nacional de Mar del Plata. Facultad de Ingenieria; ArgentinaFil: Zucchi, Ileana Alicia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigación en Ciencia y Tecnología de Materiales (i); Argentina. Universidad Nacional de Mar del Plata. Facultad de Ingenieria; ArgentinaFil: Rico, Maite. Universidad da Coruña; EspañaFil: Hoppe, Cristina Elena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigación en Ciencia y Tecnología de Materiales (i); Argentina. Universidad Nacional de Mar del Plata. Facultad de Ingenieria; ArgentinaFil: Williams, Roberto Juan Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigación en Ciencia y Tecnología de Materiales (i); Argentina. Universidad Nacional de Mar del Plata. Facultad de Ingenieria; ArgentinaAmerican Chemical Society2013-06-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/2651Romeo, Hernan Esteban; Zucchi, Ileana Alicia; Rico, Maite; Hoppe, Cristina Elena; Williams, Roberto Juan Jose; From spherical micelles to hexagonally packed cylinders: the cure cycle determines nanostructures generated in block copolymer/ epoxy blends; American Chemical Society; Macromolecules; 46; 12; 4-6-2013; 4854-48610024-9297enginfo:eu-repo/semantics/altIdentifier/doi/10.1021/ma400778sinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:03:33Zoai:ri.conicet.gov.ar:11336/2651instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 10:03:33.275CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv From spherical micelles to hexagonally packed cylinders: the cure cycle determines nanostructures generated in block copolymer/ epoxy blends
title From spherical micelles to hexagonally packed cylinders: the cure cycle determines nanostructures generated in block copolymer/ epoxy blends
spellingShingle From spherical micelles to hexagonally packed cylinders: the cure cycle determines nanostructures generated in block copolymer/ epoxy blends
Romeo, Hernan Esteban
Epoxy
Block Copolymer
Micelles
Nanoestructures
title_short From spherical micelles to hexagonally packed cylinders: the cure cycle determines nanostructures generated in block copolymer/ epoxy blends
title_full From spherical micelles to hexagonally packed cylinders: the cure cycle determines nanostructures generated in block copolymer/ epoxy blends
title_fullStr From spherical micelles to hexagonally packed cylinders: the cure cycle determines nanostructures generated in block copolymer/ epoxy blends
title_full_unstemmed From spherical micelles to hexagonally packed cylinders: the cure cycle determines nanostructures generated in block copolymer/ epoxy blends
title_sort From spherical micelles to hexagonally packed cylinders: the cure cycle determines nanostructures generated in block copolymer/ epoxy blends
dc.creator.none.fl_str_mv Romeo, Hernan Esteban
Zucchi, Ileana Alicia
Rico, Maite
Hoppe, Cristina Elena
Williams, Roberto Juan Jose
author Romeo, Hernan Esteban
author_facet Romeo, Hernan Esteban
Zucchi, Ileana Alicia
Rico, Maite
Hoppe, Cristina Elena
Williams, Roberto Juan Jose
author_role author
author2 Zucchi, Ileana Alicia
Rico, Maite
Hoppe, Cristina Elena
Williams, Roberto Juan Jose
author2_role author
author
author
author
dc.subject.none.fl_str_mv Epoxy
Block Copolymer
Micelles
Nanoestructures
topic Epoxy
Block Copolymer
Micelles
Nanoestructures
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
https://purl.org/becyt/ford/2.10
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Block copolymer (BCP)/epoxy blends have been intensively investigated during the past decade. Macrophase separation of the BCP in the cured thermoset is avoided by selecting one block that is initially immiscible or that phase separates early in the polymerization and another block that remains miscible up to high conversions. But the quality of the thermoset as a solvent of the miscible block varies along the cure cycle with both conversion and temperature. It shifts from a good solvent to a poor solvent, and eventually to a nonsolvent, by increasing conversion mainly due to the increase in the average molar mass before gelation and the cross-link density after gelation. It also changes with temperature due to the corresponding variation of the interaction parameter. Therefore, for a constant BCP concentration different nanostructures might be accessed and fixed by changing the cure cycle. This can be of interest to modulate final properties of the material (e.g., toughness, transparency, etc.). The selected system to prove this concept was a solution of 20 wt % PS-b-PMMA (Mn = 67 100, ΦPS = 0.69) in a stoichiometric mixture of diglycidyl ether of bisphenol A (DGEBA) and 4,4′- methylenebis(2,6-diethylaniline) (MDEA). Generated nanostructures varied with the selected cure cycle from a dispersion of spherical micelles to a dual morphology consisting of domains of hexagonally packed cylinders and regions with a dispersion of spherical micelles. This produced changes in transparency and in dynamic-mechanical properties of the resulting nanocomposites.
Fil: Romeo, Hernan Esteban. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigación en Ciencia y Tecnología de Materiales (i); Argentina. Universidad Nacional de Mar del Plata. Facultad de Ingenieria; Argentina
Fil: Zucchi, Ileana Alicia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigación en Ciencia y Tecnología de Materiales (i); Argentina. Universidad Nacional de Mar del Plata. Facultad de Ingenieria; Argentina
Fil: Rico, Maite. Universidad da Coruña; España
Fil: Hoppe, Cristina Elena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigación en Ciencia y Tecnología de Materiales (i); Argentina. Universidad Nacional de Mar del Plata. Facultad de Ingenieria; Argentina
Fil: Williams, Roberto Juan Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigación en Ciencia y Tecnología de Materiales (i); Argentina. Universidad Nacional de Mar del Plata. Facultad de Ingenieria; Argentina
description Block copolymer (BCP)/epoxy blends have been intensively investigated during the past decade. Macrophase separation of the BCP in the cured thermoset is avoided by selecting one block that is initially immiscible or that phase separates early in the polymerization and another block that remains miscible up to high conversions. But the quality of the thermoset as a solvent of the miscible block varies along the cure cycle with both conversion and temperature. It shifts from a good solvent to a poor solvent, and eventually to a nonsolvent, by increasing conversion mainly due to the increase in the average molar mass before gelation and the cross-link density after gelation. It also changes with temperature due to the corresponding variation of the interaction parameter. Therefore, for a constant BCP concentration different nanostructures might be accessed and fixed by changing the cure cycle. This can be of interest to modulate final properties of the material (e.g., toughness, transparency, etc.). The selected system to prove this concept was a solution of 20 wt % PS-b-PMMA (Mn = 67 100, ΦPS = 0.69) in a stoichiometric mixture of diglycidyl ether of bisphenol A (DGEBA) and 4,4′- methylenebis(2,6-diethylaniline) (MDEA). Generated nanostructures varied with the selected cure cycle from a dispersion of spherical micelles to a dual morphology consisting of domains of hexagonally packed cylinders and regions with a dispersion of spherical micelles. This produced changes in transparency and in dynamic-mechanical properties of the resulting nanocomposites.
publishDate 2013
dc.date.none.fl_str_mv 2013-06-04
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/2651
Romeo, Hernan Esteban; Zucchi, Ileana Alicia; Rico, Maite; Hoppe, Cristina Elena; Williams, Roberto Juan Jose; From spherical micelles to hexagonally packed cylinders: the cure cycle determines nanostructures generated in block copolymer/ epoxy blends; American Chemical Society; Macromolecules; 46; 12; 4-6-2013; 4854-4861
0024-9297
url http://hdl.handle.net/11336/2651
identifier_str_mv Romeo, Hernan Esteban; Zucchi, Ileana Alicia; Rico, Maite; Hoppe, Cristina Elena; Williams, Roberto Juan Jose; From spherical micelles to hexagonally packed cylinders: the cure cycle determines nanostructures generated in block copolymer/ epoxy blends; American Chemical Society; Macromolecules; 46; 12; 4-6-2013; 4854-4861
0024-9297
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1021/ma400778s
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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