VISCONANONET

Modelling the viscoelasticity of polymer-based nanocomposites guided by principles of non-equilibrium thermodynamics

Coordinatore	UNIVERSITY OF CYPRUS    more  Organization address address: KALLIPOLEOS STREET 75 city: NICOSIA postcode: 1678 contact info Titolo: Dr. Nome: Georgios Cognome: Georgiou Email: send email Telefono: +357 22 892612 Fax: +357 22 892601
Nazionalità Coordinatore	Cyprus [CY]
Totale costo	75˙000 €
EC contributo	75˙000 €
Programma	FP7-PEOPLE Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013)
Code Call	FP7-PEOPLE-2011-CIG
Funding Scheme	MC-CIG
Anno di inizio	2011
Periodo (anno-mese-giorno)	2011-08-01   -   2014-07-31

 Partecipanti

#	participant	country	role	EC contrib. [€]
1	UNIVERSITY OF CYPRUS  Organization address address: KALLIPOLEOS STREET 75 city: NICOSIA postcode: 1678 contact info Titolo: Dr. Nome: Georgios Cognome: Georgiou Email: send email Telefono: +357 22 892612 Fax: +357 22 892601	CY (NICOSIA)	coordinator	75˙000.00

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 Obiettivo del progetto (Objective)

'By appropriately adding nanoparticles to a polymer matrix can lead to materials with dramatically improved properties, especially under conditions of good dispersion. From a rheological point of view, polymer nanocomposites are typically considered to be soft colloidal dispersions, with an intrinsically disordered structure that greatly affects their viscoelastic or mechanical properties. Despite that the rheological properties of nanocomposites in the melt can be predicted or explained via entanglement network simulations based on multiscale simulation strategies, large-scale macroscopic calculations of their processing flows requires reliable constitutive (viscoelastic) equations which are currently missing. Our objective in the proposed project is to develop such constitutive models guided by principles of nonequilibrium thermodynamics. In particular, we propose to develop a new family of differential models capable of describing the complicated rheological behavior of polymer nanocomposites as a function of the viscoelastic properties of the native polymer matrix and a few parameters describing polymer-filler interactions. The new models will be thermodynamically admissible and will be validated against experimentally measured data for the linear and non-linear viscoelastic properties of selected systems. They will also be employed in large scale finite- or spectral-element calculations in flows such as extrusion and calendering. The outcome of our work will be new differential constitutive equations capable of explaining or describing a number of intricate phenomena typically observed in the preparation and processing of polymer-matrix nanocomposites: filler alignment for anisotropic fillers, particle clustering, network formation, jamming etc., and their effect on the observed rheological properties (yield stress, stress overshoot, etc.)'