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Experimental investigation on mechanical and thermo-mechanical properties of alumina filled polypropylene composites using injection molding process / Deepak Kumar in INTERNATIONAL POLYMER PROCESSING, Vol. XXXII, N° 3 (07/2017)
[article]
Titre : Experimental investigation on mechanical and thermo-mechanical properties of alumina filled polypropylene composites using injection molding process Type de document : texte imprimé Auteurs : Deepak Kumar, Auteur ; G. S. Dangayach, Auteur ; P. N. Rao, Auteur Année de publication : 2017 Article en page(s) : p. 316-325 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alumine
Charges (matériaux)
Composites -- Moulage par injection
Composites -- Propriétés mécaniques
Composites -- Propriétés thermomécaniques
Composites thermoplastiques
PolypropylèneIndex. décimale : 668.4 Plastiques, vinyles Résumé : In the present study, Polypropylene composites were fabricated by varying different weight percentages (0 to 20%) of alumina powder by using Injection Molding Technique. Then the fabricated composites were characterized by physical characterization such as void content test, chemical characterization such as Fourier-transform infrared spectroscopy, mechanical characterization such as Shore hardness test, flexural test, compressive strength, Izod impact test, thermo-mechanical characterizations such as Dynamic Mechanical Analysis, Thermo-gravimetric analysis and morphological characterizations such as Scanning Electron Microscopy (SEM) and Atomic force Microscopy (AFM). The results indicate that the shore hardness values increase up to 25% with the increase in alumina filler up to 20%. The highest flexural strength and flexural modulus achieved are 59.26 MPa and 2126 MPa respectively with 20% filler loading. Further, it was also revealed that the storage modulus of the composites was found to be higher than that of the virgin PP because filler increases the stiffness of the composites. Thermo-gravimetric analysis (TGA) measurements indicate that both the initial degradation temperature and end degradation temperature increase with increasing filler content. SEM exhibits that alumina particles were uniformly and finely dispersed though some aggregates and agglomerates are identifiable. AFM results indicate that morphology of alumina in the PP matrix is characterized by a chainlike branched structure. Note de contenu : - EXPERIMENTAL : Selection of raw materials - Preparation of composite using plastics injection molding technique - Characterization of the samples
- RESULTS AND DISCUSSION : FTIR spectra of alumina filled polypropylene composites - Effect of void content on alumina filled polyprpylene composites - Effect of shore hardness on alumina filled polypropylene composites - Effect of impact strength on alumina filled polypropylene composites - Effect of flexural properties on alumina filled polypropylene composites - Effect of compressive strength on alumina filled polypropylene composites - Dynamic mechanical analysis - Thermo-gravimetric analysis (TGA) - Scanning electron microscopy - Atomic force microscopy (AFM)DOI : 10.3139/217.3323 En ligne : https://drive.google.com/file/d/1Cp0fErLrNIF8T2Mh7x3QEcNsQ5bNKwmA/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28833
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXII, N° 3 (07/2017) . - p. 316-325[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19064 - Périodique Bibliothèque principale Documentaires Disponible Experimental study for extrusion of polypropylene/wood flour composites / Krzysztof J. Wilczynski in INTERNATIONAL POLYMER PROCESSING, Vol. XXX, N° 1 (03/2015)
[article]
Titre : Experimental study for extrusion of polypropylene/wood flour composites Type de document : texte imprimé Auteurs : Krzysztof J. Wilczynski, Auteur ; A. Nastaj, Auteur ; A. Lewandowski, Auteur ; Krzysztof J. Wilczynski, Auteur ; K. Buziak, Auteur Année de publication : 2015 Article en page(s) : p. 113-120 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bois
Composites à fibres végétales
Composites à fibres végétales -- Extrusion
Polypropylène
PoudresIndex. décimale : 668.9 Polymères Résumé : Experimental studies have been carried out for single screw extrusion of PP/wood flour composite of different concentrations of wood flour. A “screw pull-out” technique was used for investigation of the material transport, melting and screw filling. The effect of the screw speed was investigated. It was concluded that WPC extrusion is substantially different from thermoplastics extrusion. Material transport and melting are strongly dependent on the WPC composition, and operating conditions. The contiguous solids melting mechanism CSM is not observed for WPC of high WF content; however, it may be observed for WPC of lower WF content, up to 50% WF. Several steps of the process are distinguished: material compaction in the solid conveying section close to the active flight and then spreading to the rest of the material, melting which is strongly dependent on the material composition, and shear or plug flow with slipping at the walls in the melt conveying section. DOI : 10.3139/217.3007 En ligne : https://drive.google.com/file/d/1fo7zalncFdgla02vcfE-RTXc3xIV4L49/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23432
in INTERNATIONAL POLYMER PROCESSING > Vol. XXX, N° 1 (03/2015) . - p. 113-120[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17016 - Périodique Bibliothèque principale Documentaires Disponible Exploiting opportunities in lightweight construction / Holger Gunkel in KUNSTSTOFFE INTERNATIONAL, Vol. 98, N° 9/2008 (09/2008)
[article]
Titre : Exploiting opportunities in lightweight construction Type de document : texte imprimé Auteurs : Holger Gunkel, Auteur ; Stefan Reinemann, Auteur Année de publication : 2008 Article en page(s) : p. 82-85 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alliages polymères -- propriétés mécaniques
Fibres acryliques
Fibres polypropyléniques
Matières plastiques
Polypropylène
Thermoplastiques -- Propriétés mécaniquesIndex. décimale : 668.4 Plastiques, vinyles Résumé : PP/PAN fiber compounds - Inexpensive and light with excellent mechanical properties. Due to their low specific gravity and balanced property profile a broad spectrum of applications, particularly in lightweight construction and as cost effective alternatives to technical polymers, is opening up for fiber-reinforced thermoplastic compounds based on polypropylene and polyacrylonitrile fibers. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3767
in KUNSTSTOFFE INTERNATIONAL > Vol. 98, N° 9/2008 (09/2008) . - p. 82-85[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 010699 - Périodique Bibliothèque principale Documentaires Disponible Exploring the applicability of a simplified fully coupled flow/orientation algorithm developed for polymer composites extrusion deposition additive manufacturing / Zhaogui Wang in INTERNATIONAL POLYMER PROCESSING, Vol. 37, N° 1 (2022)
[article]
Titre : Exploring the applicability of a simplified fully coupled flow/orientation algorithm developed for polymer composites extrusion deposition additive manufacturing Type de document : texte imprimé Auteurs : Zhaogui Wang, Auteur Année de publication : 2022 Article en page(s) : p. 106-119 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Algorithmes
Chlorure de polyvinyle
Composites polymères
Impression tridimensionnelle par dépôt par extrusion
Polyamide 6
Polycarbonates
Polypropylène
RhéologieIndex. décimale : 668.4 Plastiques, vinyles Résumé : Prior literature employed a finite element based fully coupled algorithm that solved the flow/orientation coupling effects in extrusion deposition additive manufacturing, i.e., a key component for identifying the material properties of solidified deposited polymer composites. However, the complex iterative solution protocol reduces the computational capability of the algorithm. This paper simplifies the finite element based fully coupled algorithm by employing a scalar representation of the fourth order orientation tensor affected viscosity tensor. The revised code predicts similar fiber orientation results as compared to a related prior study. With the simplified fully coupled algorithm, effects of material deposition rate and fiber aspect ratio on a 2D planar large area extrusion deposition flow are explored, where the power law rheology model is employed for the flow simulation. Computed results show that an increased material deposition rate reduces the extrudate-swell ratio of the melt front and varies the local fiber orientation of the deposited bead especially near the flow region in contact with the substrate. Higher fiber aspect ratio enhances the principal fiber alignment of the extrusion and deposition flows, where the maximum local difference of the principal A 11 component is 23% with increasing fiber aspect ratio from 10 to 25. Note de contenu : - METHODOLOGY : Governing equations - Simplification of anisotropic viscosity tensor
- EXTRUSION DEPOSITION FLOW MODELLING
- NUMERICAL SIMULATION RESULTS : Material deposition rate - Fiber aspect ratio
- Table 1 : Convergence performance of simplified algorithm when applyong different material deposition ratesDOI : https://doi.org/10.1515/ipp-2021-4186 En ligne : https://drive.google.com/file/d/19eRubrMaV5RArAcDhshUrISduOrvwmpC/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38445
in INTERNATIONAL POLYMER PROCESSING > Vol. 37, N° 1 (2022) . - p. 106-119[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23736 - Périodique Bibliothèque principale Documentaires Disponible Expofil / Tino Belleli in L'INDUSTRIE TEXTILE, N° 1327 (01/2001)
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Titre : Expofil : innovation fibres Type de document : texte imprimé Auteurs : Tino Belleli, Auteur Année de publication : 2001 Article en page(s) : p. 24-25 Langues : Français (fre) Catégories : Coton Le coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles).
Fibres cellulosiques
Fibres textiles
Fibres textiles synthétiques
Fibrillation
Filature
Polypropylène
Textiles et tissus imper-respirantsIndex. décimale : 677 Textiles Résumé : Le confort au porter reste la principale préoccupation des producteurs. Le point sur leurs derniers développements. Note de contenu : - Le consommateur apprécie les fibres synthétiques
- Un fil qui accélère l'évacuation de l'humidité
- Une fibre qui préserve les bactéries essentielles
- Un polypropylène doux pour sous-vêtements
- Lyocell : la fibrillation contrôlée
- Un fil de coton à centre creux
- Tactel et nature chez DuPontPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18915
in L'INDUSTRIE TEXTILE > N° 1327 (01/2001) . - p. 24-25[article]Réservation
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