Could alfa fibers substitute glass fibers in composite materials ? / Yousra Abdallah in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIV, N° 1 (03/2019)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXXIV, N° 1 (03/2019) . - p. 133-142 Titre : Could alfa fibers substitute glass fibers in composite materials ? Type de document : texte imprimé Auteurs : Yousra Abdallah, Auteur ; R. Ben Cheikh, Auteur ; M. C. Paiva, Auteur Année de publication : 2019 Article en page(s) : p. 133-142 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse thermique Caractérisation Composites à fibres -- Propriétés mécaniques Composites à fibres -- Propriétés thermiques Composites à fibres de verre Composites à fibres végétales Essais (technologie) Etudes comparatives Fibres d'alfa Morphologie (matériaux) Traction (mécanique) Index. décimale : 668.4 Plastiques, vinyles Résumé : In the present work polyester resin composites with Alfa fibers in the form of pulp were prepared and their properties were compared with those of polyester resin reinforced with glass fibers, the latter composites being widely used for structural applications. The composites were prepared using two manufacturing processes, namely hand lay-up and vacuum molding, to assess the influence of the process on the composites properties. Firstly, the tensile properties for the two composites were evaluated. The composites thermal properties were studied by differential scanning calorimetry and thermogravimetric analysis. Finally, the morphology of a glass fiber composite (GFC) and Alfa pulp composite (APC) was analyzed by scanning electron microscopy, to characterize the composites surface and cross-sections. Note de contenu : - MATERIALS AND METHODS : Raw materials - Composites processing manufacture/experimental procedure - Mechanical properties - Morphological testing - Thermal analysis - RESULTS AND DISCUSSION : Morphological characterization - Mechanical properties - Thermal properties - Discussion of th ecomposites tensile properties DOI : 10.3139/217.3652 En ligne : https://drive.google.com/file/d/1OAw6VcDjpHe1N0Bmone-Ov0s6XAqO1Hh/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31925 [article]

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Development of dispersion during compounding and extrusion of polypropylene/graphite nanoplates composites / P. Rodrigues in INTERNATIONAL POLYMER PROCESSING, Vol. XXXII, N° 5 (11/2017)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXXII, N° 5 (11/2017) . - p. 614-622 Titre : Development of dispersion during compounding and extrusion of polypropylene/graphite nanoplates composites Type de document : texte imprimé Auteurs : P. Rodrigues, Auteur ; R. M. Santos, Auteur ; M. C. Paiva, Auteur ; J. A. Covas, Auteur Année de publication : 2017 Article en page(s) : p. 614-622 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Composites -- Extrusion Composites -- Propriétés électriques Compoundage Dispersions et suspensions Graphite Matériaux hybrides Nanoparticules Polypropylène Index. décimale : 668.4 Plastiques, vinyles Résumé : Carbon-based nanoparticles have unique electrical, thermal, barrier and mechanical properties. When incorporated into polymer matrices, the resulting nanocomposites are potentially suitable for a wide scope of advanced applications. In practice, the properties of the nanocomposites are strongly determined by the level of dispersion achieved and by the degree of polymer/particle interfacial bonding. Production and processing of nanocomposites are often carried out in successive thermo-mechanical cycles. These may change the state of nanoparticle dispersion. This work analyzes the evolution of the dispersion of graphite nanoplates (GnP) in a polypropylene matrix during compounding in a co-rotating twin screw extruder and subsequent processing in a single screw extruder, aiming at a better understanding of the kinetics and stability of dispersion. Dispersion was evaluated along the compounding and processing stages and correlated with the composite electrical conductivity, an important engineering property. Two commercial GnP were used as received and chemically modified to graft PP-g-MA (fGnP-PP). Compositions with 2 or 10 wt.% of GnP and fGnP-PP were studied. Note de contenu : - Materials - Compounding and processing - Characterization of the nanocomposites DOI : 10.3139/217.3485 En ligne : https://drive.google.com/file/d/1xiKrMkmefmuG60dMjMK_-OG8Is8qt8I-/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29428 [article]

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