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Journal of Polymer Research
Erschienen in: Journal of Polymer Research 2/2016

01.02.2016 | Original Paper

Morphology, thermal and mechanical properties of polypropylene/SiO2 nanocomposites obtained by reactive blending

verfasst von: Magdalena Grala, Zbigniew Bartczak, Artur Różański

Erschienen in: Journal of Polymer Research | Ausgabe 2/2016

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Abstract

The isotactic polypropylene – modified silica (iPP/SiO2) hybrid nanocomposites, obtained by grafting polypropylene chains on amine-functionalized silica particles during reactive blending, were studied. It was found that use of amine-functionalized silica and PP-g-MA as a compatibilizer improved dispersion of nanoparticles. Nanosilica, especially surface-modified, revealed some nucleation activity towards iPP, manifesting in an increase of the crystallization temperature and reduction of spherulite size. iPP/silica nanocomposites exhibit highly improved thermo-oxidative stability, due to formation of a silica protective layer, limiting the polymer volatilization rate. Nanocomposites demonstrate enhanced stiffness and strength, but at higher silica content the ductility is nearly lost due to presence of big agglomerates, acting as critical-sized structural flaws. At low silica concentrations dispersion was improved and big agglomerates were not observed. Consequently, iPP/PP-g-MA/am-SiO2 nanocomposites with low silica content demonstrate high ductility and enhanced impact resistance, related to reinforcing effect of well dispersed silica particles.
Vorheriger Artikel Synthesis and characterization of novel poly(aryl ether ketone)s containing biphenylene moieties and pendant cyano groups
Nächster Artikel Determination of molar mass of structured acrylic microgels: effect of molar mass on coating properties of self-crosslinking latexes

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Metadaten
Titel
Morphology, thermal and mechanical properties of polypropylene/SiO2 nanocomposites obtained by reactive blending
verfasst von
Magdalena Grala
Zbigniew Bartczak
Artur Różański
Publikationsdatum
01.02.2016
Verlag
Springer Netherlands
Erschienen in
Journal of Polymer Research / Ausgabe 2/2016
Print ISSN: 1022-9760
Elektronische ISSN: 1572-8935
DOI
https://doi.org/10.1007/s10965-015-0914-0

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