Rotational molding of polyamide-6 nanocomposites with improved flame retardancy / E. Calò in INTERNATIONAL POLYMER PROCESSING, Vol. XXVII, N° 3 (07/2012)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXVII, N° 3 (07/2012) . - p. 370-377 Titre : Rotational molding of polyamide-6 nanocomposites with improved flame retardancy Type de document : texte imprimé Auteurs : E. Calò, Auteur ; C. Massaro, Auteur ; R. Terzi, Auteur ; A. Cancellara, Auteur ; E. Pesce, Auteur ; M. Re, Auteur ; A. Greco, Auteur ; A. Maffezzoli, Auteur ; P. I. Gonzalez, Auteur ; A. Salomi, Auteur Année de publication : 2012 Article en page(s) : p. 370-377 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse thermomécanique Ignifugeants Composé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface. Matières plastiques -- Rotomoulage Montmorillonite Polyamide 6 Rhéologie Index. décimale : 668.4 Plastiques, vinyles Résumé : The aim of this work was to develop polyamide-6/ organic modified montmorillonite (omMMT) nanocomposites for the production of hollow parts by rotational molding. Particular emphasis was placed on the mechanical and flame retardancy properties needed for the fabrication of vessels for flammable liquids. The morphology of the melt compounded nanocomposites, produced by melt compounding, was investigated by Xray diffraction measurements (WAXD), and Transmission Electron Microscopy (TEM) showed an exfoliated structure. Rheological measurements were used in order to verify whether the viscosity of materials was adequate for rotational molding. While thermomechanical analysis has revealed that neat PA6 and its nanocomposites were not suitable for rotational molding, due to the very low thermal stability of the polymer, the addition of a thermal stabilizer, shifted the onset of degradation to higher temperatures, thus widening the processing window of both PA6 and PA6 nanocomposites. Largescale vessel prototypes were obtained by rotational molding of thermo-stabilized PA6 and its nanocomposites, and samples extracted from the rotomolded parts were characterized with respect to physical and mechanical properties. It was found that the PA6 nanocomposites exhibited significant improvements at cone calorimeter tests in comparison with neat PA6. DOI : 10.3139/217.2552 En ligne : https://drive.google.com/file/d/1FTUKzbnIG5oK6lzcCucRm0UPr0OtatOk/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15583 [article]

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Solubility and durability of cardanol derived plasticizers for soft PVC / A. Greco in INTERNATIONAL POLYMER PROCESSING, Vol. XXXI, N° 5 (11/2016)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXXI, N° 5 (11/2016) . - p. 577-586 Titre : Solubility and durability of cardanol derived plasticizers for soft PVC Type de document : texte imprimé Auteurs : A. Greco, Auteur ; F. Ferrari, Auteur ; R. Velardi, Auteur ; M. Frigione, Auteur ; A. Maffezzoli, Auteur Année de publication : 2016 Article en page(s) : p. 577-586 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorption Cardanol Chlorure de polyvinyle Durée de vie (Ingénierie) Epoxydation Essais accélérés (technologie) Gélification Plastifiants Rhéologie Solubilité Souplesse (mécanique) Index. décimale : 668.4 Plastiques, vinyles Résumé : The aim of this work is the analysis of the suitability of cardanol derivatives as primary plasticizer for polyvinyl chloride (PVC). Cardanol derived plasticizers (CDP) were obtained by acetylation of cardanol, followed by epoxidation of the side chain double bonds. The developed procedures allowed to achieve high yields of acetylated cardanol, whereas plasticizers characterized by different yields of epoxidation were obtained, according to the used synthesis procedure. Rheological analysis was used in order to study the gelation process of PVC plastisols with CDP. A comparison of commercial phthalate and natural derived plasticizers showed that the CDP are characterized by adequate gelation properties, involving a complete absorption of the plasticizers at relatively low temperatures. The gelation properties showed a strong dependence on the yield of the epoxidation. In particular, lower gelation temperatures, higher plasticizer absorption and faster gelation were observed for higher epoxy content in the plasticizer. Finally, ageing tests were performed on soft PVC produced by the CDP. The weight loss of soft PVC with CDP is comparable to that of commercial plasticizers, particularly at high yields of epoxidation. DOI : 10.3139/217.3237 En ligne : https://drive.google.com/file/d/1YK59j8qoG1stCxiIvFJoeZBS3bl0mwKo/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27395 [article]

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