The effect of nanosilicates on the performance of polyethylene terephthalate films prepared by twin-screw extrusion / A. Ghanbari in INTERNATIONAL POLYMER PROCESSING, Vol. 36, N° 4 (2021)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. 36, N° 4 (2021) . - p. 358-366 Titre : The effect of nanosilicates on the performance of polyethylene terephthalate films prepared by twin-screw extrusion Type de document : texte imprimé Auteurs : A. Ghanbari, Auteur ; M.-C. Heuzey, Auteur ; Pierre J. Carreau, Auteur Année de publication : 2021 Article en page(s) : p. 358-366 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Composites -- Propriétés mécaniques Composites -- Propriétés optiques Composites -- Propriétés thermiques Extrudeuse bi-vis Matières plastiques -- Extrusion Montmorillonite Nanoparticules Polyéthylène téréphtalate Silicates Index. décimale : 668.4 Plastiques, vinyles Résumé : Polyethylene terephthalate (PET) films were prepared by cast extrusion using a twin-screw extruder with a severe screw profile. The effect of an organically modified montmorillonite on thermal, mechanical, optical, and barrier properties of the PET films were investigated. Morphological characterization of the nanocomposite films was performed by employing wide angle X-ray diffraction (WAXD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) followed by image analysis. The results unfold a mixed morphology for the nanocomposite films with more than 95% exfoliated and intercalated silicate layer structures, depending on the screw rotation speed. The remarkable dispersion of the organoclay particles at the nano-level is discussed in terms of solubility parameter and favorable interactions between PET macromolecules and organic modifier of the nanoclay. The crystal content of the nanocomposite films and their cold and hot crystallization temperatures confirmed the role of silicate nanolayers as a heterogeneous nucleating agent. While all nanocomposite films exhibit higher haze values in comparison to the neat PET samples, incorporation of 2 wt% nanoclay brought about 25% increase in tensile modulus and barrier properties. A range of screw rotation speeds with optimized properties in terms of haze, morphology, thermal, mechanical, and barrier properties is suggested. Note de contenu : - Materials - Sample preparation - Characterization - Table 1 : DSC analysis results of the neat PET and nanocomposite films at various screw rotation speeds DOI : https://doi.org/10.1515/ipp-2020-4044 En ligne : https://drive.google.com/file/d/1UF1Q7xDZbldM1DEaaAvzkMvJsgouDJwq/view?usp=shari [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36708 [article]

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