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Microcellular PP vs. microcellular PP/MMT nanocomposites : a comparative study of their mechanical behavior / S. J. A. Rizvi in INTERNATIONAL POLYMER PROCESSING, Vol. XXVI, N° 4 (09/2011)

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inINTERNATIONAL POLYMER PROCESSING > Vol. XXVI, N° 4 (09/2011) . - p. 375-382

Titre :	Microcellular PP vs. microcellular PP/MMT nanocomposites : a comparative study of their mechanical behavior
Type de document :	texte imprimé
Auteurs :	S. J. A. Rizvi, Auteur ; Naresh Bhatnagar, Auteur
Année de publication :	2011
Article en page(s) :	p. 375-382
Note générale :	Bibliogr.
Langues :	Anglais (eng)
Catégories :	Anhydride maléique Azote Copolymères greffés Extrudeuse bi-vis Fluides supercritiques Matières plastiques -- Moulage par injection microcellulaire Montmorillonite Mousses plastiques -- Extrusion Mousses plastiques -- Propriétés mécaniques Nanoparticules Nucléation Polypropylène
Index. décimale :	668.9 Polymères
Résumé :	Microcellular foams have attracted interest in both scientific and industrial communities. Injection molding is perhaps the most versatile industrial method of polymer processing. Microcellular injection molding is a newcomer variant in this class. It is capable to produce microcellular structure. The mechanical behavior of a microcellular polymer is different than conventional foams. Although they exhibit much improved mechanical properties than conventional foams still they are inferior to solid polymer. Incorporation of nanoparticles in matrix may affect the nucleation and bubble growth process. Further, nanoparticles will enhance the performance (stiffness, strength etc.) of matrix. In present study an effort has been made to quantitatively analyze the improvements in mechanical properties of microcellular foam with the addition of nanoclay (MMT). Nanocomposite of polypropylene and nanoclay was prepared in a co-rotating twin screw extruder. Maleic anhydride grafted polypropylene (PP-g-MA) was used as compatibilizer. PP/nanocomposites were foamed in a microcellular injection molding machine, where supercritical nitrogen (SCF-N2) was mixed with plasticized PP/ nanocomposite inside the screw – barrel assembly. The molded foamed samples were tested for various mechanical properties. Experimental results show that a considerable improvement occur in the property of microcellular polypropylene by the addition of 2 wt.% nanoclay (MMT).
DOI :	10.3139/217.2375
En ligne :	https://drive.google.com/file/d/1f6-1RrQ1xrQyO-cb5JWkYXr4szFJ_G6i/view?usp=drive [...]
Format de la ressource électronique :	Pdf
Permalink :	https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12435

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