Polymer dynamics in epoxy/alumina nanocomposites studied by various techniques

Kyritsis, A; Vikelis, G; Maroulas, P; Pissis, P; Milosheva, B; Kotsilkova, R; Toplijska, A; Silvestre, C; Duraccio, D

dc.contributor.author	Kyritsis, A	en
dc.contributor.author	Vikelis, G	en
dc.contributor.author	Maroulas, P	en
dc.contributor.author	Pissis, P	en
dc.contributor.author	Milosheva, B	en
dc.contributor.author	Kotsilkova, R	en
dc.contributor.author	Toplijska, A	en
dc.contributor.author	Silvestre, C	en
dc.contributor.author	Duraccio, D	en
dc.date.accessioned	2014-03-01T01:36:39Z
dc.date.available	2014-03-01T01:36:39Z
dc.date.issued	2011	en
dc.identifier.issn	0021-8995	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/21380
dc.subject	boehmite	en
dc.subject	dielectric properties	en
dc.subject	epoxy/alumina nanocomposites	en
dc.subject	glass transition	en
dc.subject	polymer dynamics	en
dc.subject.classification	Polymer Science	en
dc.subject.other	boehmite	en
dc.subject.other	Broadband dielectric relaxation spectroscopy	en
dc.subject.other	Curing agents	en
dc.subject.other	Dielectric permittivities	en
dc.subject.other	Dielectric techniques	en
dc.subject.other	Diethylenetriamine	en
dc.subject.other	Diglycidyl ether of bisphenol-A	en
dc.subject.other	Dynamic mechanical thermal analysis	en
dc.subject.other	epoxy/alumina nanocomposites	en
dc.subject.other	Glass transition temperature	en
dc.subject.other	Interfacial relaxation	en
dc.subject.other	Nano-dispersions	en
dc.subject.other	polymer dynamics	en
dc.subject.other	Real part	en
dc.subject.other	Secondary relaxations	en
dc.subject.other	Storage moduli	en
dc.subject.other	Thermally stimulated depolarization currents	en
dc.subject.other	Dielectric properties	en
dc.subject.other	Dynamic mechanical analysis	en
dc.subject.other	Ethers	en
dc.subject.other	Glass	en
dc.subject.other	Nanocomposites	en
dc.subject.other	Nanoparticles	en
dc.subject.other	Phenols	en
dc.subject.other	Polymers	en
dc.subject.other	Resins	en
dc.subject.other	Scanning electron microscopy	en
dc.subject.other	Spectroscopy	en
dc.subject.other	Thermoanalysis	en
dc.subject.other	Viscosity	en
dc.subject.other	Glass transition	en
dc.title	Polymer dynamics in epoxy/alumina nanocomposites studied by various techniques	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/app.34161	en
heal.identifier.secondary	http://dx.doi.org/10.1002/app.34161	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	Epoxy/alumina nanocomposites of various compositions were prepared by dispersing modified and nonmodified boehmite nanoparticles in diglycidyl ether of bisphenol-A using diethylenetriamine as curing agent. Measurements of the viscosity of the nanodispersions provided information on particle-particle and particle-resin interactions. The structure of the nanocomposites was studied by scanning electron microscopy on fractured samples. Effects of nanoparticles on polymer dynamics was studied in detail by dynamic mechanical thermal analysis and two dielectric techniques, broadband dielectric relaxation spectroscopy and thermally stimulated depolarization currents. Three secondary relaxations, c, b, and x, the segmental a relaxation associated with the glass transition, and an interfacial relaxation, in the order of increasing frequency/decreasing temperature, were observed and studied. A correlation between viscosity (of the nanodispersions), storage modulus, glass transition temperature, real part of dielectric permittivity, and ductility of the nanocomposites was observed. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 121: 3613-3627, 2011	en
heal.publisher	WILEY-BLACKWELL	en
heal.journalName	Journal of Applied Polymer Science	en
dc.identifier.doi	10.1002/app.34161	en
dc.identifier.isi	ISI:000291613900063	en
dc.identifier.volume	121	en
dc.identifier.issue	6	en
dc.identifier.spage	3613	en
dc.identifier.epage	3627	en