Synthesis and characterization of polycyanurate/montmorillonite nanocomposites

Anthoulis, GI; Kontou, E; Fainleib, A; Bei, I; Gomza, Y

dc.contributor.author	Anthoulis, GI	en
dc.contributor.author	Kontou, E	en
dc.contributor.author	Fainleib, A	en
dc.contributor.author	Bei, I	en
dc.contributor.author	Gomza, Y	en
dc.date.accessioned	2014-03-01T01:29:16Z
dc.date.available	2014-03-01T01:29:16Z
dc.date.issued	2008	en
dc.identifier.issn	0887-6266	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19198
dc.subject	Montmorillonite	en
dc.subject	Morphology	en
dc.subject	Nanoparticles	en
dc.subject	Organoclay	en
dc.subject	Polycyanurate	en
dc.subject	Topology	en
dc.subject	Viscoelastic properties	en
dc.subject.classification	Polymer Science	en
dc.subject.other	Agglomeration	en
dc.subject.other	Atomic force microscopy	en
dc.subject.other	Chemical reactions	en
dc.subject.other	Clay minerals	en
dc.subject.other	Coagulation	en
dc.subject.other	Colloids	en
dc.subject.other	Competition	en
dc.subject.other	Computer networks	en
dc.subject.other	Curing	en
dc.subject.other	Dispersion (waves)	en
dc.subject.other	Drying	en
dc.subject.other	Dynamic analysis	en
dc.subject.other	Dynamic mechanical analysis	en
dc.subject.other	Dynamical systems	en
dc.subject.other	Electron microscopes	en
dc.subject.other	Electron microscopy	en
dc.subject.other	Electron optics	en
dc.subject.other	Equipment testing	en
dc.subject.other	Esters	en
dc.subject.other	Gelation	en
dc.subject.other	Glass transition	en
dc.subject.other	Imaging techniques	en
dc.subject.other	Industrial economics	en
dc.subject.other	Loading	en
dc.subject.other	Mechanical properties	en
dc.subject.other	Metallic matrix composites	en
dc.subject.other	Microfluidics	en
dc.subject.other	Microscopes	en
dc.subject.other	Microscopic examination	en
dc.subject.other	Monomers	en
dc.subject.other	Nanocomposites	en
dc.subject.other	Organic compounds	en
dc.subject.other	Organoclay	en
dc.subject.other	Polyimides	en
dc.subject.other	Polymerization	en
dc.subject.other	Polymers	en
dc.subject.other	Scanning	en
dc.subject.other	Scanning electron microscopy	en
dc.subject.other	Scanning probe microscopy	en
dc.subject.other	Silicate minerals	en
dc.subject.other	Tensile properties	en
dc.subject.other	Tensile strength	en
dc.subject.other	Tensile testing	en
dc.subject.other	Three dimensional	en
dc.subject.other	X ray analysis	en
dc.subject.other	Applied (CO)	en
dc.subject.other	Atomic force (AF)	en
dc.subject.other	Clay loadings	en
dc.subject.other	Curing rates	en
dc.subject.other	Cyanate ester (CE)	en
dc.subject.other	Dynamic mechanical analysis (DMTA)	en
dc.subject.other	Electron microscopy (TEM and SEM)	en
dc.subject.other	Elongation at break (EB)	en
dc.subject.other	Homogeneous dispersions	en
dc.subject.other	Intercalated structures	en
dc.subject.other	Interlayer spacings	en
dc.subject.other	Montmorillonite (MMT)	en
dc.subject.other	Morphology and mechanical properties	en
dc.subject.other	nano composites	en
dc.subject.other	Organoclays	en
dc.subject.other	particle diameters	en
dc.subject.other	Phase imaging	en
dc.subject.other	Polycyanurate	en
dc.subject.other	Polymeric matrices	en
dc.subject.other	polymerization conditions	en
dc.subject.other	Secondary transitions	en
dc.subject.other	Strength (IGC: D5/D6)	en
dc.subject.other	Synthesis and characterization	en
dc.subject.other	Systematic (CO)	en
dc.subject.other	Tensile tests	en
dc.subject.other	Transition (Jel Classifications:E52 ,E41 ,E31)	en
dc.subject.other	Wide angle X ray structural (WAXS) analysis	en
dc.subject.other	Wide-angle X-ray scattering (WAXS)	en
dc.subject.other	Young's modulus (IGC: E14/K14)	en
dc.subject.other	Nanostructured materials	en
dc.title	Synthesis and characterization of polycyanurate/montmorillonite nanocomposites	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/polb.21436	en
heal.identifier.secondary	http://dx.doi.org/10.1002/polb.21436	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	The advantages of cyanate esters (CEs) versus competitor systems such as epoxies and polyimides, as well as the great reinforcing potential of organoclays properly dispersed into a polymeric matrix, have been examined in a series of poly-cyanurate (PCN)/montmorillonite (MMT) nanocomposites prepared under appropriate polymerization conditions. The curing schedule applied resulted in gradual propagation of polymerization. Through this procedure, the intragallery curing rate becomes comparable to the extragallery one, allowing intercalation before gelation. Systems with clay loadings from 1 to 3% per weight were synthesized, and their morphology and mechanical properties were studied by means of scanning electron microscopy (SEM), atomic force microscopy (AFM), wide angle X-ray scattering (WAXS), dynamic mechanical analysis (DMA), and tensile tests. Microscopy investigations revealed better dispersion for the 3 wt % system compared to smaller concentrations, in which aggregation and, in some cases, agglomeration were the conspicuous features. Roughness and area analyses revealed more homogeneous dispersion for this nanocomposite. Topology and 3D-phase images further suggested considerable reduction of the average particle diameters. WAXS analysis showed that the interlayer spacing of nanocomposites was increased compared to pristine MMT, indicating the formation of intercalated structures. On the other hand, tensile strength and elongation at break values displayed abrupt diminution with MMT addition, while Young's modulus exhibited a slight but systematic increment with MMT content. The decreasing glass transition tendency observed for small clay loadings was reversed in the case of 3 wt %, while secondary transitions were practically unaffected by the presence of MMT. (c) 2008 Wiley Periodicals, Inc.	en
heal.publisher	JOHN WILEY & SONS INC	en
heal.journalName	Journal of Polymer Science, Part B: Polymer Physics	en
dc.identifier.doi	10.1002/polb.21436	en
dc.identifier.isi	ISI:000256390300005	en
dc.identifier.volume	46	en
dc.identifier.issue	11	en
dc.identifier.spage	1036	en
dc.identifier.epage	1049	en