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Could alfa fibers substitute glass fibers in composite materials ? / Yousra Abdallah in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIV, N° 1 (03/2019)
[article]
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 propertiesDOI : 10.3139/217.3652 En ligne : https://drive.google.com/file/d/1OAw6VcDjpHe1N0Bmone-Ov0s6XAqO1Hh/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31925
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXIV, N° 1 (03/2019) . - p. 133-142[article]Réservation
Réserver ce documentPreparation and characterization of a biocomposite based on cork microparticles in poly(B-hydroxybutyrate)-co-poly(B-hydroxyvalerate) matrix / Mariem Ayadi in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIV, N° 2 (05/2019)
[article]
Titre : Preparation and characterization of a biocomposite based on cork microparticles in poly(B-hydroxybutyrate)-co-poly(B-hydroxyvalerate) matrix Type de document : texte imprimé Auteurs : Mariem Ayadi, Auteur ; R. Ben Cheikh, Auteur ; N. Dencheva, Auteur ; Z. Denchev, Auteur Année de publication : 2019 Article en page(s) : p. 270-278 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Allongement à la rupture
Charges (matériaux)
Composites -- Moulage par compression
Composites -- Propriétés mécaniques
Composites -- Propriétés thermiques
Copolymères
Elasticité
Essais dynamiques
Liège
Matériaux hybrides
Particules (matières)
Poly-B-hydroxybutyrate
poly-B-hydroxyvalérate
Traction (mécanique)Index. décimale : 668.4 Plastiques, vinyles Résumé : Poly(β-hydroxybutyrate)-co-poly(β-hydroxyvalerate) (PHBV) loaded with 1 to 10 wt.% of cork microparticles (CM) were manufactured via compression molding technique. CM were isolated by alkali, bleaching and acid hydrolysis treatments. They were then added to the PHBV matrices via solution casting technique. The filler microparticles showed typical diameters of 10 to 55 μm. Mechanical tests in tension showed that in PHBV containing 5 wt.% CM the Young's modulus and the tensile strength increased by 50% and 10% respectively. Meanwhile, the elongation at break decreased by 70% for the same CM content. The mechanical behavior of the reinforced composites was discussed in conjunction with the morphology of the samples studied by optical and electron microscopy. The temperature of initial degradation Tid, the temperature at 5% weight loss Td5% and the temperature of maximum degradation Tdmax increase with increasing CM content by up to 13.6°C, 10.1°C and 12.3°C respectively for the composite of 5 wt.%. The composite with 10 wt.% CM content showed the best thermal stability with temperature increments of 20°C, 14.1°C and 21.5°C respectively. DSC results showed that the presence of CM has a very weak influence on the melting/crystallization behavior of the composites. Note de contenu : - EXPERIMENTAL : Materials - Isolation of cork microparticles - Preparation of the PHBV/CM composites - Characterization
- RESULTS AND DISCUSSION : Morphological studies by microscopy - Thermal stability - Melting and crystallization behavior - Mechanical propertiesDOI : 10.3139/217.3713 En ligne : https://drive.google.com/file/d/11v7IpsHwHZK8xpGqrjvl7LkO-l6rQZjU/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32403
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXIV, N° 2 (05/2019) . - p. 270-278[article]Réservation
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