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Attemps to optimize the dispersion state during twin-screw extrusion of polypropylene/clay nanocomposites / G. Normand in INTERNATIONAL POLYMER PROCESSING, Vol. XXXII, N° 1 (03/2017)

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inINTERNATIONAL POLYMER PROCESSING > Vol. XXXII, N° 1 (03/2017) . - p. 129-137

Titre :	Attemps to optimize the dispersion state during twin-screw extrusion of polypropylene/clay nanocomposites
Type de document :	texte imprimé
Auteurs :	G. Normand, Auteur ; Edith Peuvrel-Disdier, Auteur ; Bruno Vergnes, Auteur
Année de publication :	2017
Article en page(s) :	p. 129-137
Note générale :	Bibliogr.
Langues :	Anglais (eng)
Catégories :	Alliages polymères Anhydride maléique Argile Composites -- Extrusion Diffractométrie de rayons X Dispersions et suspensions Etat fondu (matériaux) Nanoparticules Polypropylène Rhéologie
Index. décimale :	668.4 Plastiques, vinyles
Résumé :	Polypropylene/organoclay nanocomposites were prepared by melt-mixing in a twin-screw extruder. Polypropylene grafted with maleic anhydride was used as compatibilizer. The evolution of the microstructure along the screw profile was characterized through dead-stop experiments. In order to quantify the multi-scale dispersion state of the nanocomposites, different techniques have been used: scanning electronic microscopy (SEM) to observe the large remaining aggregates, X-Ray diffraction measurements to characterize the intercalation state by measuring the interlamellar distance, and finally rheological characterizations in the molten state to assess the dispersion state at the nanoscale. The effects of low barrel temperatures and high matrix viscosity were tested, in order to improve exfoliation by an increase in shear stresses.
Note de contenu :	- MATERIALS AND METHODS : Materials - Twin-screw extrusion - Characterization - RESULTS AND DISCUSSION : Evolution of the dispersion state along the screws - Effect of a low barrel temperature - Effect of a high viscosity matrix - Interpretation
DOI :	10.3139/217.3318
En ligne :	https://drive.google.com/file/d/1i-4ZYBKF_WuluOWvtuIHqGd_2OioNa_d/view?usp=drive [...]
Format de la ressource électronique :	Pdf
Permalink :	https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28009

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