Nanocomposites of Polystyrene-b-Poly(isoprene)-b-Polystyrene Triblock Copolymer with Clay-Carbon Nanotube Hybrid Nanoadditivesm

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dc.contributor.authorEnotiadis, A.en
dc.contributor.authorLitina, K.en
dc.contributor.authorGournis, D.en
dc.contributor.authorRangou, S.en
dc.contributor.authorAvgeropoulos, A.en
dc.contributor.authorXidas, P.en
dc.contributor.authorTriantafyllidis, K.en
dc.date.accessioned2015-11-24T17:36:22Z
dc.date.available2015-11-24T17:36:22Z
dc.identifier.issn1520-6106-
dc.identifier.urihttps://olympias.lib.uoi.gr/jspui/handle/123456789/14238
dc.rightsDefault Licence-
dc.subjectlayered silicate nanocompositesen
dc.subjectnonlinear block-copolymersen
dc.subjectdouble gyroid phaseen
dc.subjectmechanical-propertiesen
dc.subjectthermoplastic elastomersen
dc.subjectinfrared reflectanceen
dc.subjectcatalytic productionen
dc.subjectraman-spectroscopyen
dc.subjectpolymeren
dc.subjectfilmsen
dc.titleNanocomposites of Polystyrene-b-Poly(isoprene)-b-Polystyrene Triblock Copolymer with Clay-Carbon Nanotube Hybrid Nanoadditivesmen
heal.abstractPolystyrene-b-polyisoprene-b-polystyrene (PS-b-PI-b-PS), a widely used linear triblock copolymer of the glassy-rubbery-glassy type, was prepared in this study by anionic polymerization and was further used for the development of novel polymer nanocomposite materials. Hybrid nanoadditives were prepared by the catalytic chemical vapor deposition (CCVD) method through which carbon nanotubes were grown on the surface of smectite clay nanolayers. Side-wall chemical organo-functionalization of the nanotubes was performed in order to enhance the chemical compatibilization of the clay-CNT hybrid nanoadditives with the hydrophobic triblock copolymer. The hybrid clay-CNT nanoadditives were incorporated in the copolymer matrix by a simple solution-precipitation method at two nanoadditive to polymer loadings (one low, i.e., 1 wt %, and one high, i.e., 5 wt %). The resulting nanocomposites were characterized by a combination of techniques and compared with more classical nanocomposites prepared using organo-modified clays as nanoadditives. FT-IR and Raman spectroscopies verified the presence of the hybrid nanoadditives in the final nanocomposites, while X-ray diffraction and transmission electron microscopy proved the formation of fully exfoliated structures. Viscometry measurements were further used to show the successful incorporation and homogeneous dispersion of the hybrid nanoadditives in the polymer mass. The so prepared nanocomposites exhibited enhanced mechanical properties compared to the pristine polymer and the nanocomposites prepared by conventional organo-clays. Both tensile stress and strain at break were improved probably due to better interfacial adhesion of the clay-CNT hybrid of the flexible rubbery PI middle blocks of the triblock copolymer matrix.en
heal.accesscampus-
heal.fullTextAvailabilityTRUE-
heal.identifier.primaryDoi 10.1021/Jp309361b-
heal.identifier.secondary<Go to ISI>://000314205200019-
heal.journalNameJournal of Physical Chemistry Ben
heal.journalTypepeer reviewed-
heal.languageen-
heal.publicationDate2013-
heal.publisherAmerican Chemical Societyen
heal.recordProviderΠανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Μηχανικών Επιστήμης Υλικώνel
heal.typejournalArticle-
heal.type.elΆρθρο Περιοδικούel
heal.type.enJournal articleen

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