A material does not appear just as chemical entity but as the harvest of a technology of elaboration which confers him a particular microstructure which is going to lead not only chemical but also physical, mechanical properties [ 1 ].The Not miscible mixtures of composite have limits of phase between both components, then it is necessary to add an agent compatibilisant to a not miscible mixture called the active material which lives specifically between both phases, by creating mutual actions to help improve the mixture of both materials[2]. The elaboration of graft copolymer was the most current method to form a copolymer of compatibility between two not miscible polymers but also the modification of the surface properties of Nanoclay is an essential stage for the manufacturing of nanocomposites polymer/clay a study in the case of the PP that of Pozsgay and al. They work with clays exchanged until 1 CEC and to study the influence of the rate of adsorption of alkylammonium of their clay on their mixtures [3]. Besides, several studies [4] - [7] which used the mixture to the state melted to know the stability of nanocomposites formed by other techniques. The working objective is to characterize the effect of the incorporation of compatibilisants and the (Org-MMT) on the mechanical and thermal behaviour of nanocomposite system. In this study of nanocomposites with polypropylene (PP) / high-density polyethylene (PEHD) / Montmorillonite organophile (Org-MMT) with various quantities (1 %, 3 % and 5 %) was prepared by insertion for the molten state. The main reason explaining the properties improved by nanocomposites are the strong interfacial interaction between the polymer matrix and the nanolayers of clay for it the addition of comptabilisants as the PP-g-MAH and PE-g-MAH in our polymeric blend has proved necessity. The organic modification of the montmorillonite was studied by Infrared spectroscopy (IRTF).

References

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[3] R. Fayt, P. Hadjiandreou , P. Teyssic, Morphology of Blends , Journal of Polymer Chemistry,Vol.23, P. 337, 1985.

[4] V.R.Vohra et al, Deintercalation of a chemically switchable polymer from a layered silicate nanocomposite. J. Polym. Sci, Part B, 2003.

[5] T.R.Ellis, Reverse exfoliation in a polymer nanocomposite by blending with a miscible polymer. Polymer, 44(21), p.6443-6448, 2003.

[6] M.Kawasumi, Preparation and mechanical properties of polypropylene-clay hybrids. Macromol, 30(20), p.6333-6338, 41(24), p.3151-3159, 1997.

[7] M.Kato et al, Synthesis of polypropylene oligomer-clay intercalation compounds. J. Applied Polymer Sci., 66(9), p.1781-1785, 1997.