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Dispersion of carbon nanotubes in polypropylene via multilayer coextrusion: Influence on the mechanical properties

Article dans une revue avec comité de lecture
Author
MIQUELARD-GARNIER, Guillaume
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
213743 Propriétés et architectures des alliages et mélanges [P2AM]
GUINAULT, Alain
213743 Propriétés et architectures des alliages et mélanges [P2AM]
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
FROMONTEIL, D
136342 PSA Peugeot Citroën
DELALANDE, S
136342 PSA Peugeot Citroën
SOLLOGOUB, Cyrille
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
213743 Propriétés et architectures des alliages et mélanges [P2AM]

URI
http://hdl.handle.net/10985/8175
DOI
10.1016/j.polymer.2013.06.007
Date
2013
Journal
Polymer

Abstract

Multilayer coextrusion was used to disperse Carbon Nanotubes (CNT) in polypropylene (PP). The dilution of commercially available masterbatches using a twin-screw extruder was first applied to produce several formulations, which were then mixed with PP using a multilayer coextrusion device to obtain films or pellets with CNT concentrations between 0.1 and 1%wt. The influence of the specific mechanical energy (SME) during the dilution step, of the addition of a compatibilizer, and of the multilayer tool on the CNT dispersion within the matrix was highlighted. The effect of the dispersion on the thermomechanical properties of the resulting materials was studied. We showed notably that films containing 0.2%wt CNT, 1%wt of PPgAm, prepared at high SME presented a Young’s modulus increase of 25e30% without significant decrease in the elongation at break. These results, using low amounts of CNT and industrially available devices, may show a new path for producing nanocomposites.

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