Structure-property relationships in isotactic polypropylene/multi-walled carbon nanotubes nanocomposites

Logakis, E; Pollatos, E; Pandis, Ch; Peoglos, V; Zuburtikudis, I; Delides, CG; Vatalis, A; Gjoka, M; Syskakis, E; Viras, K; Pissis, P

dc.contributor.author	Logakis, E	en
dc.contributor.author	Pollatos, E	en
dc.contributor.author	Pandis, Ch	en
dc.contributor.author	Peoglos, V	en
dc.contributor.author	Zuburtikudis, I	en
dc.contributor.author	Delides, CG	en
dc.contributor.author	Vatalis, A	en
dc.contributor.author	Gjoka, M	en
dc.contributor.author	Syskakis, E	en
dc.contributor.author	Viras, K	en
dc.contributor.author	Pissis, P	en
dc.date.accessioned	2014-03-01T01:34:42Z
dc.date.available	2014-03-01T01:34:42Z
dc.date.issued	2010	en
dc.identifier.issn	0266-3538	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20806
dc.subject	A. Carbon nanotubes	en
dc.subject	A. Nanocomposites	en
dc.subject	B. Electrical properties	en
dc.subject	B. Thermomechanical properties	en
dc.subject.classification	Materials Science, Composites	en
dc.subject.other	A. Carbon nanotubes	en
dc.subject.other	B. Thermomechanical properties	en
dc.subject.other	Broadband dielectric relaxation spectroscopy	en
dc.subject.other	Crystallinities	en
dc.subject.other	Crystallization behavior	en
dc.subject.other	Dc conductivity	en
dc.subject.other	Degree of crystallinity	en
dc.subject.other	Dielectric constant values	en
dc.subject.other	Electrical and dielectric properties	en
dc.subject.other	Electrical percolation threshold	en
dc.subject.other	Electrical property	en
dc.subject.other	Glassy state	en
dc.subject.other	Isotactic poly(propylene) (iPP)	en
dc.subject.other	Isotactics	en
dc.subject.other	Masterbatch	en
dc.subject.other	matrix	en
dc.subject.other	Melt mixing	en
dc.subject.other	SEM	en
dc.subject.other	Storage moduli	en
dc.subject.other	Structure property relationships	en
dc.subject.other	Thermal and mechanical properties	en
dc.subject.other	Thermal transitions	en
dc.subject.other	Thermomechanical properties	en
dc.subject.other	XRD measurements	en
dc.subject.other	Carbon nanotubes	en
dc.subject.other	Crystallization	en
dc.subject.other	Differential scanning calorimetry	en
dc.subject.other	Dynamic analysis	en
dc.subject.other	Dynamic mechanical analysis	en
dc.subject.other	Mechanical properties	en
dc.subject.other	Multiwalled carbon nanotubes (MWCN)	en
dc.subject.other	Nanocomposites	en
dc.subject.other	Percolation (computer storage)	en
dc.subject.other	Percolation (fluids)	en
dc.subject.other	Percolation (solid state)	en
dc.subject.other	Permittivity	en
dc.subject.other	Polypropylenes	en
dc.subject.other	Reconnaissance aircraft	en
dc.subject.other	Reinforced plastics	en
dc.subject.other	Solvents	en
dc.subject.other	Spectroscopy	en
dc.subject.other	Thermomechanical treatment	en
dc.subject.other	Electric properties	en
dc.subject.other	crystallization	en
dc.subject.other	electrical property	en
dc.subject.other	mechanical property	en
dc.subject.other	morphology	en
dc.subject.other	nanocomposite	en
dc.subject.other	nanotube	en
dc.subject.other	polypropylene	en
dc.subject.other	structural property	en
dc.subject.other	thermal property	en
dc.title	Structure-property relationships in isotactic polypropylene/multi-walled carbon nanotubes nanocomposites	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.compscitech.2009.10.023	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.compscitech.2009.10.023	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	In this work, the influence of multi-walled carbon nanotubes (MWCNT) on electrical, thermal and mechanical properties of CNT reinforced isotactic polypropylene (iPP) nanocomposites is studied. The composites were obtained by diluting a masterbatch of 20 wt.% MWCNT with a low viscous iPP, using melt mixing. The morphology of the prepared samples was examined through SEM, Raman and XRD measurements. The effect of MWCNT addition on the thermal transitions of the iPP was investigated by differential scanning calorimetry (DSC) measurements. Significant changes are reported in the crystallization behavior of the matrix on addition of carbon nanotubes: increase of the degree of crystallinity, as well as appearance of a new crystallization peak (owing to trans-crystallinity). Dynamic mechanical analysis (DMA) studies revealed an enhancement of the storage modulus, in the glassy state, up to 86%. Furthermore, broadband dielectric relaxation spectroscopy (DRS) was employed to study the electrical and dielectric properties of the nanocomposites. The electrical percolation threshold was calculated 0.6-0.7 vol.% MWCNT from both dc conductivity and dielectric constant values. This value is lower than previous mentioned ones in literature in similar systems. In conclusion, this works provides a simple and quick way for the preparation of PP/MWCNT nanocomposites with low electrical percolation threshold and significantly enhanced mechanical properties. (C) 2009 Elsevier Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	Composites Science and Technology	en
dc.identifier.doi	10.1016/j.compscitech.2009.10.023	en
dc.identifier.isi	ISI:000274521000015	en
dc.identifier.volume	70	en
dc.identifier.issue	2	en
dc.identifier.spage	328	en
dc.identifier.epage	335	en