English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/224791
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:

Title

Variation of ultimate properties in extruded iPP-mesoporous silica nanocomposites by effect of iPP confinement within the mesostructures

AuthorsBarranco-García, Rosa; Gómez-Elvira González, José Manuel CSIC ORCID ; Ressia, Jorge A.; Quinzani, Lidia; Valles, Enrique M.; Pérez, Ernesto CSIC ORCID; Cerrada, María L. CSIC ORCID
KeywordsMesoporous silica
MCM-41 and SBA-15
iPP nanocomposites
Thermal degradation
Rheological properties
Synchrotron SAXS measurements
Issue Date2020
PublisherMultidisciplinary Digital Publishing Institute
CitationPolymers 12 (2020)
AbstractNanocomposites based on isotactic polypropylene (iPP) and mesoporous silica particles of either MCM-41 or SBA-15 were prepared by melt extrusion. The effect of the silica incorporated into an iPP matrix was firstly detected in the degradation behavior and in the rheological response of the resultant composites. Both were ascribed, in principle, to variations in the inclusion of iPP chains within these two mesostructures, with well different pore size. DSC experiments did not provide information on the existence of confinement in the iPP-MCM-41 materials, whereas a small endotherm, located at about 100 °C and attributed to the melting of confined crystallites, is clearly observed in the iPP-SBA-15 composites. Real-time variable-temperature Small Angle X-ray Scattering (SAXS) experiments with synchrotron radiation turned out to be crucial to finding the presence of iPP within MCM-41 pores. From these measurements, precise information was also deduced on the influence of the MCM-41 on iPP long spacing since overlapping does not occur between most probable iPP long spacing peak with the characteristic diffractions from the MCM-41 hexagonal nanostructure in comparison with existing superposition in SBA-15-based materials.
Publisher version (URL)http://dx.doi.org/10.3390/polym12010070
URIhttp://hdl.handle.net/10261/224791
DOIhttp://dx.doi.org/10.3390/polym12010070
Identifiersdoi: 10.3390/polym12010070
issn: 2073-4360
Appears in Collections:(ICTP) Artículos
Files in This Item:
File Description SizeFormat 
polymers-12-00070-v2-1.pdf7,81 MBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.