Effect of iPP molecular weight on its confinement within mesoporous SBA-15 silica in extruded iPP-SBA-15 nanocomposites

Different nanocomposites based on two isotactic polypropylenes (iPP) and mesoporous SBA-15 silica have been attained by melt extrusion as an attempt to understand the influence of average molecular weight in the rheological behavior, morphological and crystalline features and in the final properties...

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Autores: Barranco-García, Rosa, Gómez-Elvira González, José Manuel, Ressia, Jorge A., Quinzani, Lidia, Vallés, Enrique M., Pérez, Ernesto, Cerrada, María L.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2020
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/198735
Acceso en línea:http://hdl.handle.net/10261/198735
Access Level:acceso abierto
Palabra clave:iPP/SBA-15 nanocomposites
Rheological percolation
Synchrotron SAXS measurements
Reinforcement
Molecular weight
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spelling Effect of iPP molecular weight on its confinement within mesoporous SBA-15 silica in extruded iPP-SBA-15 nanocompositesBarranco-García, RosaGómez-Elvira González, José ManuelRessia, Jorge A.Quinzani, LidiaVallés, Enrique M.Pérez, ErnestoCerrada, María L.iPP/SBA-15 nanocompositesRheological percolationSynchrotron SAXS measurementsReinforcementMolecular weightDifferent nanocomposites based on two isotactic polypropylenes (iPP) and mesoporous SBA-15 silica have been attained by melt extrusion as an attempt to understand the influence of average molecular weight in the rheological behavior, morphological and crystalline features and in the final properties (thermal stability and mechanical response) as well as in the capability of incorporating iPP chains within the nanometric SBA-15 pores. Closeness to rheological percolation and a significant increase of viscosity are observed as SBA-15 content is raised, this effect being more evident for the materials prepared from the iPP with the lowest molecular weight. These composites also shift their maximum degradation to lower values under inert atmosphere but keep rather unchanged decomposition behavior in oxidant conditions. No considerable changes are found with molecular weight in their morphological characteristics, nor in the type of iPP polymorph developed. The confinement of iPP chains in the SBA-15 channels, implied by a small endotherm in the DSC melting curves, is definitely ascertained by real-time variable-temperature Small Angle X-ray Scattering measurements with synchrotron radiation, suggesting, additionally, that somewhat thicker crystallites are developed within the mesostructure in the materials prepared from the iPP with inferior molecular weight. Moreover, the SBA-15 mesoporous particles exert a reinforcing role in all cases and reduce the deformation capacity of the ultimate materials as their content is increased.This work was supported by the Agencia Estatal de Investigación (AEI, Spain) together with the European Regional Development Fund (FEDER, UE) (MAT2016-79869-C2-1-P project). Ms. R Barranco-García also thanks her pre-doctoral funding (BES-2014-070972) associated with the MINECO (MAT2013-47972-C2-1-P) project. The synchrotron experiments were performed at beamline BL11-NCD at ALBA Synchrotron Light Facility with the collaboration of ALBA staff. Authors are grateful for the funding received to perform these measurements.Peer reviewedElsevierEuropean CommissionMinisterio de Economía y Competitividad (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202020202020info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/198735reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2016-79869-C2-1-Pinfo:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2013-47972-C2-1-Phttp://dx.doi.org/doi.org/10.1016/j.micromeso.2019.109945Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1987352026-05-22T06:33:51Z
dc.title.none.fl_str_mv Effect of iPP molecular weight on its confinement within mesoporous SBA-15 silica in extruded iPP-SBA-15 nanocomposites
title Effect of iPP molecular weight on its confinement within mesoporous SBA-15 silica in extruded iPP-SBA-15 nanocomposites
spellingShingle Effect of iPP molecular weight on its confinement within mesoporous SBA-15 silica in extruded iPP-SBA-15 nanocomposites
Barranco-García, Rosa
iPP/SBA-15 nanocomposites
Rheological percolation
Synchrotron SAXS measurements
Reinforcement
Molecular weight
title_short Effect of iPP molecular weight on its confinement within mesoporous SBA-15 silica in extruded iPP-SBA-15 nanocomposites
title_full Effect of iPP molecular weight on its confinement within mesoporous SBA-15 silica in extruded iPP-SBA-15 nanocomposites
title_fullStr Effect of iPP molecular weight on its confinement within mesoporous SBA-15 silica in extruded iPP-SBA-15 nanocomposites
title_full_unstemmed Effect of iPP molecular weight on its confinement within mesoporous SBA-15 silica in extruded iPP-SBA-15 nanocomposites
title_sort Effect of iPP molecular weight on its confinement within mesoporous SBA-15 silica in extruded iPP-SBA-15 nanocomposites
dc.creator.none.fl_str_mv Barranco-García, Rosa
Gómez-Elvira González, José Manuel
Ressia, Jorge A.
Quinzani, Lidia
Vallés, Enrique M.
Pérez, Ernesto
Cerrada, María L.
author Barranco-García, Rosa
author_facet Barranco-García, Rosa
Gómez-Elvira González, José Manuel
Ressia, Jorge A.
Quinzani, Lidia
Vallés, Enrique M.
Pérez, Ernesto
Cerrada, María L.
author_role author
author2 Gómez-Elvira González, José Manuel
Ressia, Jorge A.
Quinzani, Lidia
Vallés, Enrique M.
Pérez, Ernesto
Cerrada, María L.
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv European Commission
Ministerio de Economía y Competitividad (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv iPP/SBA-15 nanocomposites
Rheological percolation
Synchrotron SAXS measurements
Reinforcement
Molecular weight
topic iPP/SBA-15 nanocomposites
Rheological percolation
Synchrotron SAXS measurements
Reinforcement
Molecular weight
description Different nanocomposites based on two isotactic polypropylenes (iPP) and mesoporous SBA-15 silica have been attained by melt extrusion as an attempt to understand the influence of average molecular weight in the rheological behavior, morphological and crystalline features and in the final properties (thermal stability and mechanical response) as well as in the capability of incorporating iPP chains within the nanometric SBA-15 pores. Closeness to rheological percolation and a significant increase of viscosity are observed as SBA-15 content is raised, this effect being more evident for the materials prepared from the iPP with the lowest molecular weight. These composites also shift their maximum degradation to lower values under inert atmosphere but keep rather unchanged decomposition behavior in oxidant conditions. No considerable changes are found with molecular weight in their morphological characteristics, nor in the type of iPP polymorph developed. The confinement of iPP chains in the SBA-15 channels, implied by a small endotherm in the DSC melting curves, is definitely ascertained by real-time variable-temperature Small Angle X-ray Scattering measurements with synchrotron radiation, suggesting, additionally, that somewhat thicker crystallites are developed within the mesostructure in the materials prepared from the iPP with inferior molecular weight. Moreover, the SBA-15 mesoporous particles exert a reinforcing role in all cases and reduce the deformation capacity of the ultimate materials as their content is increased.
publishDate 2020
dc.date.none.fl_str_mv 2020
2020
2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/198735
url http://hdl.handle.net/10261/198735
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2016-79869-C2-1-P
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2013-47972-C2-1-P
http://dx.doi.org/doi.org/10.1016/j.micromeso.2019.109945
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
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