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Visiovis : monitoring nanofiller dispersion/distribution in molten polymers / Antonella Esposito in JEC COMPOSITES MAGAZINE, N° 41 (06/2008)
[article]
Titre : Visiovis : monitoring nanofiller dispersion/distribution in molten polymers Type de document : texte imprimé Auteurs : Antonella Esposito, Auteur ; Jean Balcaen, Auteur ; Jannick Duchet-Rumeau, Auteur ; Jean-Yves Charmeau, Auteur Année de publication : 2008 Article en page(s) : p. 67-71 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Matériau composite' 'Etude expérimentale' 'Appareil mesure' Fluorescence 'Degré dispersion' Argile renforcé' Dispersion Nanocomposite Polymère 'Etat fondu' Monitorage Index. décimale : 668.4 Plastiques, vinyles Résumé : The intimate mixture of nanofillers and polymers leads to an extraordinarily extended interface. However, the greatest advantage of nanocomposites becomes the main driving force for filler aggregation. This is unfortunate, as the ability to disperse nanofillers in polymers is a strict requisite for any profitable commercialization of nanocomposites. Note de contenu : - Polymer-clay nanocomposites
- Visiovis
- Some early resultsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14124
in JEC COMPOSITES MAGAZINE > N° 41 (06/2008) . - p. 67-71[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 010460 - Périodique Bibliothèque principale Documentaires Disponible Visualization analysis of a multilayer foam development process in microcellular injection molding / T. Yamada in INTERNATIONAL POLYMER PROCESSING, Vol. XXVII, N° 3 (07/2012)
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Titre : Visualization analysis of a multilayer foam development process in microcellular injection molding Type de document : texte imprimé Auteurs : T. Yamada, Auteur ; Y. Murata, Auteur ; H. Yokoi, Auteur Année de publication : 2012 Article en page(s) : p. 299-309 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Construction sandwich
Matières plastiques -- Moulage par injection microcellulaire
Mousses plastiques
Polystyrène
Revêtements multicouchesIndex. décimale : 668.4 Plastiques, vinyles Résumé : In this study, cross-sectional analyses were performed on microcellular injection-molded high-impact polystyrene products. The results confirm that the following five types of layers were formed: Skin layers I (the silver streak layer) and II (a nonfoamed layer), Core layers I (cell diameter, d > 150 µm), II (d < 50 µm), and III (d > 100 µm). As the maximum in-mold pressure (Pmax) was increased from 5 to 30 MPa, the thickness of Skin layer II remained nearly constant. However, the foam types in the core layers changed from I and II to II and III or III only, resulting in an increase in cell diameter and a decrease in cell density. The process of cellular structure formation was observed using a glass-inserted mold, which revealed that this process consists of a flow (with a burst of cells at the melt front and the subsequent flow of the melt containing the cells), an end of the filling (involving elastic compression or the dissolution and disappearance of cells formed in the flow stage), and a cooling (new cell generation and growth and cooling solidification). Based on these cross-sectional observations, in concert with meltpressure measurements and visualizations, we developed a model describing the formation process of Skin layer II and the core layers including a new concept that considers the melt pressure inside the cavity. The following layers are incorporated into the model: Skin layer II: A nonfoamed layer is formed in the area of the melt front where gases diffuse out from within the melt during the filling stage, and this nonfoamed layer moves to from melt front to the surface of the product due to fountain flow. Core layers I and II: A multilayer is formed containing a distribution of cells preserved from the flow stage due to the low compression forces, Core layer III: cells are dissolved in the melt due to strong compression forces at the end of the filling stage and then reform and grow in the cooling stage. DOI : 10.3139/217.2443 En ligne : https://drive.google.com/file/d/1dVnoo3jHmY1a6xZXcNmshaz-sdzkH-C-/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15575
in INTERNATIONAL POLYMER PROCESSING > Vol. XXVII, N° 3 (07/2012) . - p. 299-309[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13995 - Périodique Bibliothèque principale Documentaires Disponible Visualization analysis of resin flow behavior around a flow front using a rotary runner exchange system / Y. Kanetoh in INTERNATIONAL POLYMER PROCESSING, Vol. XXVII, N° 3 (07/2012)
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Titre : Visualization analysis of resin flow behavior around a flow front using a rotary runner exchange system Type de document : texte imprimé Auteurs : Y. Kanetoh, Auteur ; H. Yokoi, Auteur Année de publication : 2012 Article en page(s) : p. 310-317 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Ecoulement visqueux
Fluides, Mécanique des
Matières plastiques -- Moulage par injection -- Appareils et matériel
Moulage par injection -- Défauts
Moules d'injection
PolystyrèneIndex. décimale : 668.4 Plastiques, vinyles Résumé : In plastic injection molding, external defects such as flow marks are serious problems. These external defects are known to occur during cavity filling processes inside the mold, and are closely related to resin flow behavior in the flow front area. In this study, the authors propose a new method for visualizing in-mold resin flow behavior using a glass-inserted mold and rotary runner exchange system capable of instantaneously switching two types of melt at the runner just before the gate. This method is capable not only of dynamic visualization, but also static visualization by the observation of cross-sections of a sample, because colored resins switched multiple times at the gate spread in layers inside the sample and freeze. Using this method and general purpose polystyrene, visualization analysis of the flow behavior of inner layer resins near the flow front in simple rectangular cavities was carried out. As a result, it was found that resins reaching the flow front are not exposed at the molded product surface immediately after the fountain-flow process, but remain along the circumference of the flow front for a long period of time, and then stretch out into a thin filmlike shape to form the surface of the molded product. In addition, the inner layer resins near the flow front form a converging flow just before reaching the flow front and then form a fountain flow. It was also confirmed that this is a general phenomenon in the fountain-flow process during injection molding regardless of whether the resin is crystalline or noncrystalline. Based on these results, we built a model on the flow of inner layer resins near the flow front of general resins. DOI : 10.3139/217.2457 En ligne : https://drive.google.com/file/d/12C-9v6b6ma__sKVLqopueoqxp7OW7vvm/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15576
in INTERNATIONAL POLYMER PROCESSING > Vol. XXVII, N° 3 (07/2012) . - p. 310-317[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13995 - Périodique Bibliothèque principale Documentaires Disponible Visualization analysis of temperature distribution in the cavity of conventional PPS and high-thermal-conductivity PPS during the filling stage of injection molding / Akifumi Kurita in INTERNATIONAL POLYMER PROCESSING, Vol. 38, N° 1 (2023)
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Titre : Visualization analysis of temperature distribution in the cavity of conventional PPS and high-thermal-conductivity PPS during the filling stage of injection molding Type de document : texte imprimé Auteurs : Akifumi Kurita, Auteur ; Yohei Yoshimura, Auteur ; Makoto Suzuki, Auteur ; Hidetoshi Yokoi, Auteur ; Yusuke Kajihara, Auteur Année de publication : 2023 Article en page(s) : p. 42-53 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Matières plastiques -- Moulage par injection
Polysulfures de phénylène
Rayonnement infrarouge
Thermocinétique
ThermographieIndex. décimale : 668.4 Plastiques, vinyles Résumé : As a highly thermally conductive PPS that is lightweight and has excellent heat dissipation is expected to be applied in various products, its peculiar filling behavior can cause molding defects such as short shots and surface cracks. To address these challenges, it is important to elucidate the filling behavior and clarify the effects of cavity shape and molding conditions. Thus, we intend to visualize the filling behavior of the high-thermal-conductivity PPS. To achieve this goal, we develop an in-process visualization system to reveal both the thermal and kinetic behaviors of the resin while it fills the cavity. In the system, a sapphire prism glass is utilized in the mold for visualization because it exhibits high strength, high heat conduction, and high infrared transmittance. A high-speed visible camera for kinetic behavior and an infrared camera for thermal behavior are utilized. With the developed system, we successfully obtained for the first time the filling behavior of high-thermal-conductivity PPS. Visualization experiments prove that the temperature of the conventional PPS gradually decreases from the tip to the rear of the flow. However, the temperature of the high-thermal-conductivity PPS drops sharply from the tip of the flow to the rear, and breakage at the flow front near the cavity wall is generated. Our interpretation is that the flow front near the cavity wall can be easily broken when it is stretched, because the ductility of the high-thermal-conductivity PPS largely decreases because of the rapid temperature drop. To suppress the formation of this breakage, we modify the cavity shape and molding conditions, and verify its suppression effect. Note de contenu : - EXPERIMENTAL : In-process visualization system - Material, cavity shape and molding conditions
- RESULTS AND DISCUSSION : Visualization of conventional PPS - Visualization of high-thermal-conductivity PPS - Discussion of the unstable flow mechanism of high-thermal-conductivity PPSDOI : https://doi.org/10.1515/ipp-2022-4225 En ligne : https://drive.google.com/file/d/1ut9VU4Gf0QSTzndF-ZuqPXhKz__gq5zw/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39193
in INTERNATIONAL POLYMER PROCESSING > Vol. 38, N° 1 (2023) . - p. 42-53[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24052 - Périodique Bibliothèque principale Documentaires Disponible Visualizing resin transfer moulding behaviour using advanced 3D CAE technology / Jim Hsu in JEC COMPOSITES MAGAZINE, N° 108 (10/2016)
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Titre : Visualizing resin transfer moulding behaviour using advanced 3D CAE technology Type de document : texte imprimé Auteurs : Jim Hsu, Auteur ; Chou Hardy, Auteur ; Fred Yang, Auteur Année de publication : 2016 Article en page(s) : p. 35-36 Langues : Anglais (eng) Catégories : Composites à fibres
Construction sandwich
Eoliennes -- Conception et construction
Eoliennes -- Matériaux
Imagerie tridimensionnelle
Moulage par transfert de résine sous vide
Simulation par ordinateurIndex. décimale : 668.4 Plastiques, vinyles Résumé : Resin transfer moulding (RTM) is one of the most prevalent processes available today in composite product manufacturing since it can reduce production time and produce high-strength fibre reinforced plastic (FRP) parts. In addition, sandwich structures made of multilayer fibre mats with core material(s) have been a prominent design for wind turbine blades and aircraft part manufacturing in order to further strengthen the structural properties of FRP parts. Thus, the following study intends to gain a comprehensive understanding of using a sandwich structure design in the resin transfer moulding (RTM) process. Note de contenu : - FIGURES : 1. Sandwich structure design of a wind turbine blade - 2. Modelx 3D3D simulation : flow front time at the end of the sandwich structure filing stage - 3. ED flow analysis of a sliced section of the part in the thickness direction - 4. Comparison of the flow front results in the tghickness direction between the uniform (2D) and the anisotropy flow (3D) conditions
- TABLE : 1. The core and skin material parametersPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28172
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Code-barres Cote Support Localisation Section Disponibilité 18400 - Périodique Bibliothèque principale Documentaires Disponible Visualizing RTM behaviour using advanced 3D CAE technology / Hua-Zhan Chou in JEC COMPOSITES MAGAZINE, N° 99 (09/2015)
PermalinkVisualizing the orientation of layered silicates / Walter Michaeli in KUNSTSTOFFE INTERNATIONAL, Vol. 99, N° 10/2009 (10/2009)
PermalinkPermalinkVitamins for the circular economy / Rudolf Pfaendner in KUNSTSTOFFE INTERNATIONAL, Vol. 113, N° 3 (2023)
PermalinkDes vitesses d'exécution de plus en plus élevées / Jean Guilhem in PLASTIQUES & CAOUTCHOUCS MAGAZINE, N° 862 (11/2008)
PermalinkLe Viton participe à la réduction des émissions / K. Zetterman in CAOUTCHOUCS & PLASTIQUES, N° 782 (12/1999)
PermalinkVitrage automobile PC : liberté de design, sécurité, réduction de poids / Claude Eburdery in PLASTIQUES & ELASTOMERES MAGAZINE, N° 55-5 (06-07/2003)
PermalinkLes vitrimères / Claire Pham in PLASTIQUES & CAOUTCHOUCS MAGAZINE, N° 912 (05-06/2014)
PermalinkVoid content prediction in RTM in JEC COMPOSITES MAGAZINE, N° 21 (12/2005)
PermalinkUne voie innovante pour le recyclage chimique du PET in CAOUTCHOUCS & PLASTIQUES, N° 752 (09/1996)
PermalinkVol. 21, N° 3 - 09-10-11-12/2011 - Composites haute performance pour applications aéronautiques (Bulletin de REVUE DES COMPOSITES ET DES MATERIAUX AVANCES) / Jacques Renard
PermalinkVol. 22, N° 1 - 01-02-03-04/2012 - Dynamical behaviour of polymers and composites (Bulletin de REVUE DES COMPOSITES ET DES MATERIAUX AVANCES) / Nadia Bahlouli
PermalinkVol. 28, N° 1 - 01-02-03/2018 - Mise en oeuvre des composites à matrice thermoplastique (Bulletin de REVUE DES COMPOSITES ET DES MATERIAUX AVANCES) / Olivier De Almeida
PermalinkVol. 9, N° Hors série - 1999 - Les matériaux composites à base de bois (Bulletin de REVUE DES COMPOSITES ET DES MATERIAUX AVANCES) / Pierre Morlier
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