Cyclic extrusion of recycled high density polyethylene/banana fiber/fly ash cenosphere biocomposites : thermal and mechanical retention properties / Sukanya Satapathy in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIV, N° 1 (03/2019)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXXIV, N° 1 (03/2019) . - p. 47-58 Titre : Cyclic extrusion of recycled high density polyethylene/banana fiber/fly ash cenosphere biocomposites : thermal and mechanical retention properties Type de document : texte imprimé Auteurs : Sukanya Satapathy, Auteur Année de publication : 2019 Article en page(s) : p. 47-58 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Anhydride maléique Cendres volantes Cénosphères Composites -- Analyse Composites à fibres végétales -- Propriétés mécaniques Composites à fibres végétales -- Propriétés thermiques Copolymères greffés Fibres de banane Fibres végétales Matières plastiques -- Extrusion Morphologie (matériaux) Polyéthylène haute densité Produits et matériaux recyclés Réaction de couplage Index. décimale : 668.4 Plastiques, vinyles Résumé : Disposal of composite materials used vastly in structural applications raises the need to study the reprocessability of these systems for environmental benefits. In this paper, composites of recycled high density polyethylene (R) containing 30 wt.% banana fiber (BF)/7.5 wt.% fly ash cenospheres (FACS) were prepared with 3 wt.% maleic anhydride grafted high density polyethylene (MA-g-HDPE) as a coupling agent using twin screw extrusion followed by injection molding. The effects of thermal cycles (two times extrusion followed by injection molding) were studied on R and its composites. The samples were characterized by using tensile, flexural, izod impact tests, scanning electron microscopy (SEM), differential scanning calorimetry (DSC), thermogravimetry (TGA) and dynamic mechanical analysis (DMA). The tensile and flexural properties were improved by addition of both BF/FACS into the R matrix. The percentage retention in tensile properties of R/BF/FACS(E2) biocomposites (i.e. two times extrusion followed by injection molding) is more than 80 %, while that for flexural properties is more than 90 %. This indicates that R/BF/FACS composites exhibit good retention ability in mechanical properties after subjecting to two times twin-screw extrusion followed by injection molding. DSC results revealed that repeated extrusion improved the crystallization temperature and crystallinity of the composites with a slight reduction in melting temperature. From the TGA results, it was observed that the thermal stability (e.g. Tonset) of R was reduced by the addition of BF/FACS. However, repeated extrusion showed an improvement in thermal stability of the composites. Note de contenu : - EXPERIMENTAL : Materials - Preparation of RBF and RBFFACS biocomposites - Characterization of R and RBF, RBFFACS biocomposites - RESULTS AND DISCUSSION : Mechanical properties of R and RBF, RBFFACS biocomposites - Morphology of RBF and RBFFACS biocomposites - Thermal properties of R and RBF, RBFFACS biocomposites DOI : 10.3139/217.3597 En ligne : https://drive.google.com/file/d/1a0hdbsxsRk6VKPg921YRKRDY_MDwn4UA/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31911 [article]

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