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dc.contributor.author
Romeo, Hernan Esteban
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Zucchi, Ileana Alicia
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Rico, Maite
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Hoppe, Cristina Elena
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Williams, Roberto Juan Jose
dc.date.available
2016-02-03T15:11:24Z
dc.date.issued
2013-06-04
dc.identifier.citation
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
dc.identifier.issn
0024-9297
dc.identifier.uri
http://hdl.handle.net/11336/3986
dc.description.abstract
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.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Chemical Society
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Block Copolymers
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Nanostructures
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Epoxy Resins
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Spherical Micelles
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Nano-materiales
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Nanotecnología
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INGENIERÍAS Y TECNOLOGÍAS
dc.title
From spherical micelles to hexagonally packed cylinders: the cure cycle determines nanostructures generated in block copolymer/epoxy blends
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-03-30 10:35:44.97925-03
dc.journal.volume
46
dc.journal.number
12
dc.journal.pagination
4854-4861
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Washington
dc.description.fil
Fil: Romeo, Hernan Esteban. Universidad Nacional de Mar del Plata. Facultad de Ingeniería; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigación en Ciencia y Tecnología de Materiales (i); Argentina
dc.description.fil
Fil: Zucchi, Ileana Alicia. Universidad Nacional de Mar del Plata. Facultad de Ingeniería; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigación en Ciencia y Tecnología de Materiales (i); Argentina
dc.description.fil
Fil: Rico, Maite. Universidad da Coruña; España
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Fil: Hoppe, Cristina Elena. Universidad Nacional de Mar del Plata. Facultad de Ingeniería; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigación en Ciencia y Tecnología de Materiales (i); Argentina
dc.description.fil
Fil: Williams, Roberto Juan Jose. Universidad Nacional de Mar del Plata. Facultad de Ingeniería; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigación en Ciencia y Tecnología de Materiales (i); Argentina
dc.journal.title
Macromolecules
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/10.1021/ma400778s
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info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1021/ma400778s
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info:eu-repo/semantics/altIdentifier/url/http://pubs.acs.org/doi/abs/10.1021/ma400778s