Morphology, thermal and mechanical properties of polypropylene/SiO2 nanocomposites obtained by reactive blending
PBN-AR
Instytucja
Centrum Badań Molekularnych i Makromolekularnych Polskiej Akademii Nauk
Informacje podstawowe
Główny język publikacji
angielski
Czasopismo
Journal of Polymer Research
ISSN
1022-9760
EISSN
1572-8935
Wydawca
Springer
DOI
URL
Rok publikacji
2016
Numer zeszytu
2
Strony od-do
art. no. 25, 1-19
Numer tomu
23
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Język
angielski
Treść
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.
Cechy publikacji
Oryginalny artykuł naukowy
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System-identifier
PX-57d26bd5c2dcd20f1cf3ea62
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