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The influence of extrusion conditions on mechanical and thermal properties of virgin and recycled PP, HIPS, ABS and their ternary blends / Erik Stenvall in INTERNATIONAL POLYMER PROCESSING, Vol. XXVIII, N° 5 (11/2013)
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Titre : The influence of extrusion conditions on mechanical and thermal properties of virgin and recycled PP, HIPS, ABS and their ternary blends Type de document : texte imprimé Auteurs : Erik Stenvall, Auteur ; S. Tostar, Auteur ; A. Boldizar, Auteur ; J. Foreman, Auteur Année de publication : 2013 Article en page(s) : p. 541-549 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alliages polymères
Compatibilité chimique et physique
Matières plastiques -- Extrusion
Matières plastiques -- Propriétés mécaniques
Matières plastiques -- Propriétés thermiques
Matières plastiques dans les équipements électriques et électroniques -- Recyclage
Polypropylène
Polystyrène choc
Terpolymère acrylonitrile butadiène styrèneIndex. décimale : 668.4 Plastiques, vinyles Résumé : A recyclable plastics waste stream of electrical and electronic equipment has previously been found to contain acrylonitrile-butadiene-styrene copolymer (ABS, ?40 wt%), high impact polystyrene (HIPS, ?40 wt%), polypropylene (PP, ?10wt%) and a rest fraction consisting mainly of other styrene-based thermoplastics. In this work, one virgin and one recycled ternary blend consisting of these three components were melt-blended in an extruder to study the influence of processing conditions on the mechanical and thermal properties. The aim of the work has been to understand the inherent compatibility between ABS, HIPS and PP without added compatibilisers, in order to investigate the recycling potential of a real recyclable WEEE plastics fraction. Favourable processing conditions with respect to tensile properties of the virgin blend were found at intermediate screw rotations (40 to 80min–1) and relatively low barrel temperatures (170 to 220°C), which can be understood from the low onset of thermo-oxidative degradation at 200°C. The recycled blend and recycled ABS, HIPS and PP showed higher stiffness and yield stress, but lower elongation at break than the corresponding virgin materials. The stiffness and yield stress of the blends were found mainly to follow the rule of mixtures of their components while the elongation at break exhibited adverse characteristics indicating incompatibility between ABS, HIPS and PP. The significant variations in the elongation at break of the blends appeared to be due to the ABS component. Differential scanning calorimetry showed an additional melt peak for the recycled blend compared to the virgin blend, otherwise the transitions were similar. The additional peak could be assigned to polyethylene in the PP component. The onset of the thermo-oxidative degradation was found to be at almost 190°C in the case of the recycled blend, which was high considering that it was close to that of the virgin blend and higher than expected from the rule of mixtures of the recycled components. Note de contenu : - Pre-study
- Influence of processing parameters on a virgin ternary blend (TBV)
- Mechanical properties
- Thermal propertiesDOI : 10.3139/217.2801 En ligne : https://drive.google.com/file/d/1vn22ykMr8JThKEZ119VmqTviQO8wySt4/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19900
in INTERNATIONAL POLYMER PROCESSING > Vol. XXVIII, N° 5 (11/2013) . - p. 541-549[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15682 - Périodique Bibliothèque principale Documentaires Disponible The mechanical properties of plasticized PVC processed in an extruder with a modified feed zone / Janusz W. Sikora in INTERNATIONAL POLYMER PROCESSING, Vol. XXX, N° 3 (07/2015)
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Titre : The mechanical properties of plasticized PVC processed in an extruder with a modified feed zone Type de document : texte imprimé Auteurs : Janusz W. Sikora, Auteur ; B. Samujlo, Auteur ; A. Stasiek, Auteur ; A. Tor-Swiatek, Auteur Année de publication : 2015 Article en page(s) : p. 359-365 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chlorure de polyvinyle
Extrudeuse monovis
Matières plastiques -- Extrusion:Polymères -- Extrusion
Matières plastiques -- Propriétés mécaniques
PlastifiantsIndex. décimale : 668.9 Polymères Résumé : The work presents the results of experimental studies of selected mechanical properties of plasticized poly(vinyl chloride) extruded by a single-screw extruder with a modified feed section. The variable factors were: feed opening width, feed pocket depth in the extruder barrel and the rotational speed of the screw. The following parameters were studied: yield strength ReH (MPa), tensile strength Rm (MPa), percentage total extension at maximum force ?m (%), Shore hardness H (°ShA). It was found that the increase in the depth of the pocket and the decrease in the width of the feed opening in the studied range increase mechanical properties (besides percentage total extension at maximum force). It was determined that the increase of the screw speed and the simultaneous displacement of both the axis and edge of the feed opening in relation to the plasticizing system axis towards the direction of revolutions of the screw is favorable. DOI : 10.3139/217.3040 En ligne : https://drive.google.com/file/d/18wkwsFGgdV7X8lI-dXqTcJ2orsvgbLFO/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24331
in INTERNATIONAL POLYMER PROCESSING > Vol. XXX, N° 3 (07/2015) . - p. 359-365[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17309 - Périodique Bibliothèque principale Documentaires Disponible Time dependence of morphology and mechanical properties of injection molded recycled PET / B. Molnár in INTERNATIONAL POLYMER PROCESSING, Vol. XXXII, N° 2 (05/2017)
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Titre : Time dependence of morphology and mechanical properties of injection molded recycled PET Type de document : texte imprimé Auteurs : B. Molnár, Auteur ; F. Ronkay, Auteur Année de publication : 2017 Article en page(s) : p. 203–208 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Granulés plastiques
Matières plastiques -- Moulage par injection
Matières plastiques -- Propriétés mécaniques
Matières plastiques -- Recyclage
Morphologie (matériaux)
Polyéthylène téréphtalateIndex. décimale : 668.4 Plastiques, vinyles Résumé : During research, injection molded samples were prepared from recycled poly(ethylene-terephthalate) granulate, and their mechanical properties were investigated as a function of time. To understand the changes in mechanical properties, both morphology of injection molded samples and recycled granulates were investigated. A three-phase morphological model was applied for the evaluation of morphological properties while mechanical properties were determined by tensile and impact tests. Relationship was found between morphological and mechanical characteristics as a function of time elapsed since production. Crystalline ratio, tensile strength, and modulus of injection molded specimens increased while impact strength decreased in the four weeks after production. Note de contenu : - EXPERIMENTAL : Materials - Injection molding and sample preparation - Characterization
- RESULTS AND DISCUSSION : Morphology of granulates - Morphology of injection molded samplesDOI : 10.3139/217.3307 En ligne : https://drive.google.com/file/d/1H0CnD-eD3irCTxXnjArPSFrufAk5HTrN/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28499
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXII, N° 2 (05/2017) . - p. 203–208[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18872 - Périodique Bibliothèque principale Documentaires Disponible A virtual seating trial / Christian Schweiger in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 10 (10/2018)
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Titre : A virtual seating trial : Performing simulation in parallel with design reduces the development time of the metrik chair Type de document : texte imprimé Auteurs : Christian Schweiger, Auteur ; Patrick Frey, Auteur ; Eva Höfli, Auteur Année de publication : 2018 Article en page(s) : p. 82-84 Langues : Anglais (eng) Catégories : Matières plastiques -- Propriétés mécaniques
PolyamidesUn polyamide est un polymère contenant des fonctions amides -C(=O)-NH- résultant d'une réaction de polycondensation entre les fonctions acide carboxylique et amine.
Selon la composition de leur chaîne squelettique, les polyamides sont classés en aliphatiques, semi-aromatiques et aromatiques. Selon le type d'unités répétitives, les polyamides peuvent être des homopolymères ou des copolymères.
Sièges
Simulation par ordinateurIndex. décimale : 668.4 Plastiques, vinyles Résumé : An integrated approach to simulation and design has a long tradition at BASF. The cooperation with the office furniture manufacturer Wilkhahn shows, with the example of the Metrik cantilever chair, how designers and engineers work together efficiently. This offering will be further extended in the future. Note de contenu : - Solving conflicting goals in material selection
- Simulating mechanical properties
- Modified geometry and overall concept
- Fig. 1 : The simulation tool shows the glass fiber orientation expected in the part. The red-marked areas have a high degree of unidirectional orientation, blue shows a low degree of unidirectional orientation
- Fig. 2 : The chair is deformed under a defined test load. The principal stresses here are the tensile loading and compressive stress
- Fig. 3 : The simultated deformation of the seat pan under service loadEn ligne : https://www.kunststoffe.de/en/journal/archive/article/performing-simulation-in-p [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31459
in KUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 10 (10/2018) . - p. 82-84[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20275 - Périodique Bibliothèque principale Documentaires Disponible