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Experimental study and micromechanical modeling of MMT platelet-reinforced PP nanocomposites

type de publication      article dans une revue internationale avec comité de lecture
date de publication 2007
auteur(s) Cauvin Ludovic; Bhatnagar Naresh; Brieu Mathias; Kondo Djimédo
journal (abréviation) Comptes Rendus Mécanique (Compt Rendus Mec)
volume (numéro) 335 (11)
pages 702 – 707
résumé Nanocomposites with platelets reinforcements are emerging materials with strong potential for future engineering applications. The present study is a first step to characterize and predict the elastic behavior of Montmorillonite (MMT) clay reinforced Polypropylene (PP) nanocomposites. The pellets of nanoclay composites were made by first uniformly mixing the MMT platelets in a twin-screw extruder by the melt intercalation route. These pellets were then converted into tensile specimens as per ASTM 638 by injection molding process. From tensile tests it is shown that there is a significant increase of the Young modulus with the mass fraction (2–7%) of clay platelets. A first approach of homogenization allows to conclude that the Ponte Castañeda and Willis (1995) bound predicts the measured moduli provided that a suitable aspect ratio of the reinforcement is considered.
mots clés Solids and structures; Nanocomposites; Experimental study; Effective moduli; Homogenization
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