Highly anisotropic nanocellular polymers based on tri-phasic blends of PMMA with two nucleating agents

One strategy to produce nanocellular polymers is the use of nucleating species to promote nucleation. Whereas two-phase systems are widely studied, tri-phasic blends with two nucleating agents are uncommonly investigated. In this work, nanocellular polymers are obtained using tri-phasic blends of po...

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Autores: Bernardo García, Victoria, Martín de León, Judit, Rodríguez Pérez, Miguel Ángel
Tipo de recurso: artículo
Estado:Versión borrador
Fecha de publicación:2019
País:España
Institución:Universidad de Valladolid
Repositorio:UVaDOC. Repositorio Documental de la Universidad de Valladolid
OAI Identifier:oai:uvadoc.uva.es:10324/40706
Acceso en línea:https://doi.org/10.1016/j.matlet.2019.126587
http://uvadoc.uva.es/handle/10324/40706
Access Level:acceso abierto
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spelling Highly anisotropic nanocellular polymers based on tri-phasic blends of PMMA with two nucleating agentsBernardo García, VictoriaMartín de León, JuditRodríguez Pérez, Miguel ÁngelOne strategy to produce nanocellular polymers is the use of nucleating species to promote nucleation. Whereas two-phase systems are widely studied, tri-phasic blends with two nucleating agents are uncommonly investigated. In this work, nanocellular polymers are obtained using tri-phasic blends of polymethylmethacrylate (PMMA) with two nucleating agents: needle-like sepiolites and a polymethylmethacrylate-polybutylacrylate-polymethylmethacrylate (MAM) block copolymer. Blends of PMMA with different concentrations of MAM and a fixed amount of sepiolites are produced by extrusion. Results show that at low MAM contents (1 wt%), the nucleation is a combination of the action of the two additives, but the addition of sepiolites induces the appearance of anisotropic structures. Meanwhile, at high MAM concentrations (10 wt%), MAM nanostructuration controls the nucleation and sepiolites increase the anisotropy. The alignment of the MAM micelles and the sepiolites in the extrusion direction promotes coalescence in this direction, leading to highly anisotropic nanocellular structures. Mean cell sizes of 100–300 nm and an average anisotropy ratio of 2.77 are obtained thanks to the combined effect of MAM and sepiolites.2019info:eu-repo/semantics/articleinfo:eu-repo/semantics/draftapplication/pdfhttps://doi.org/10.1016/j.matlet.2019.126587http://uvadoc.uva.es/handle/10324/40706reponame:UVaDOC. Repositorio Documental de la Universidad de Valladolidinstname:Universidad de ValladolidEspañolinfo:eu-repo/semantics/openAccessoai:uvadoc.uva.es:10324/407062026-06-13T12:44:47Z
dc.title.none.fl_str_mv Highly anisotropic nanocellular polymers based on tri-phasic blends of PMMA with two nucleating agents
title Highly anisotropic nanocellular polymers based on tri-phasic blends of PMMA with two nucleating agents
spellingShingle Highly anisotropic nanocellular polymers based on tri-phasic blends of PMMA with two nucleating agents
Bernardo García, Victoria
title_short Highly anisotropic nanocellular polymers based on tri-phasic blends of PMMA with two nucleating agents
title_full Highly anisotropic nanocellular polymers based on tri-phasic blends of PMMA with two nucleating agents
title_fullStr Highly anisotropic nanocellular polymers based on tri-phasic blends of PMMA with two nucleating agents
title_full_unstemmed Highly anisotropic nanocellular polymers based on tri-phasic blends of PMMA with two nucleating agents
title_sort Highly anisotropic nanocellular polymers based on tri-phasic blends of PMMA with two nucleating agents
dc.creator.none.fl_str_mv Bernardo García, Victoria
Martín de León, Judit
Rodríguez Pérez, Miguel Ángel
author Bernardo García, Victoria
author_facet Bernardo García, Victoria
Martín de León, Judit
Rodríguez Pérez, Miguel Ángel
author_role author
author2 Martín de León, Judit
Rodríguez Pérez, Miguel Ángel
author2_role author
author
description One strategy to produce nanocellular polymers is the use of nucleating species to promote nucleation. Whereas two-phase systems are widely studied, tri-phasic blends with two nucleating agents are uncommonly investigated. In this work, nanocellular polymers are obtained using tri-phasic blends of polymethylmethacrylate (PMMA) with two nucleating agents: needle-like sepiolites and a polymethylmethacrylate-polybutylacrylate-polymethylmethacrylate (MAM) block copolymer. Blends of PMMA with different concentrations of MAM and a fixed amount of sepiolites are produced by extrusion. Results show that at low MAM contents (1 wt%), the nucleation is a combination of the action of the two additives, but the addition of sepiolites induces the appearance of anisotropic structures. Meanwhile, at high MAM concentrations (10 wt%), MAM nanostructuration controls the nucleation and sepiolites increase the anisotropy. The alignment of the MAM micelles and the sepiolites in the extrusion direction promotes coalescence in this direction, leading to highly anisotropic nanocellular structures. Mean cell sizes of 100–300 nm and an average anisotropy ratio of 2.77 are obtained thanks to the combined effect of MAM and sepiolites.
publishDate 2019
dc.date.none.fl_str_mv 2019
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/draft
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status_str draft
dc.identifier.none.fl_str_mv https://doi.org/10.1016/j.matlet.2019.126587
http://uvadoc.uva.es/handle/10324/40706
url https://doi.org/10.1016/j.matlet.2019.126587
http://uvadoc.uva.es/handle/10324/40706
dc.language.none.fl_str_mv Español
language_invalid_str_mv Español
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
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instname:Universidad de Valladolid
instname_str Universidad de Valladolid
reponame_str UVaDOC. Repositorio Documental de la Universidad de Valladolid
collection UVaDOC. Repositorio Documental de la Universidad de Valladolid
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