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Electron beam processing of rubbers and their composites / A. M. Shanmugharaj in INTERNATIONAL POLYMER PROCESSING, Vol. 37, N° 5 (2022)
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Titre : Electron beam processing of rubbers and their composites Type de document : texte imprimé Auteurs : A. M. Shanmugharaj, Auteur ; V. Vijayabaskar, Auteur ; Anil K. Bhowmick, Auteur Année de publication : 2022 Article en page(s) : p. 471-504 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Charges (matériaux)
Composites
Elastomères
Faisceaux électroniques
Formulation (Génie chimique)
Matières plastiques dans les trains
Réticulation (polymérisation)
SiliceLa silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux.
La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...).
Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale.Index. décimale : 668.4 Plastiques, vinyles Résumé : Electron beam (EB) processing of pristine and filled polymeric materials is considered as one of the most viable techniques in the development of three-dimensional (3D) network structures of polymeric or composite systems with improved physical and chemical properties. The grafting, or the crosslinking process induced by the merging of the macro free radicals generated during the electron beam modification without the aid of any chemical agent or heat, is responsible for the formation of the 3D networks in polymeric systems. Owing to its distinct advantages such as fast, clean and precise, electron beam (EB) radiation technology takes up a vital role in the crosslinking of polymeric compounds. However, during the course of electron beam treatment of polymers, two processes viz., crosslinking and chain scission take place simultaneously, depending on the level of radiation dose used for the processing. The present paper reviews the role of irradiation dose in the presence and absence of radiation sensitizer on the crosslinking and structure formation in a wide variety of soft matrices such as elastomers, latexes, thermoplastic elastomers and their respective filled systems. Notable improvements in mechanical and dynamic mechanical properties, thermal stability, processing characteristics, etc., of the EB processed elastomers and their composites are discussed elaborately in the paper. Specially, the property improvements observed in the EB processed pristine and filled rubbers in comparison to the conventional crosslinking technology are critically reviewed. The level of radiation dose inducing crosslinking in both pristine and filled rubbers, determined by calculating crosslink to scission ratio on the basis of Charlesby–Pinner equation is also discussed in the paper. Finally, the application aspects of electron beam curing technology with special emphasis to cable and sealing industries as developed by one of the authors are highlighted in the paper. Note de contenu : - Radiation sources and characteristics : Types of radiation sources - Fundamentals of electron beam (EB) radiation - Advantages of electron beam (EB) radiation - Parameters/units used in EB radiation induced treatment of materials - Electron beam equipment
- Electron beam modification of rubber : EPDM rubber - Fluorocarbon elastomers - Nitrile rubber - Mixed crosslinking of nitrile rubber with reference to EB radiation - Effects of EB radiation of nitrile rubber at higher temperature
- Electron beam modification of latex
- Electron beam modification of plastics and thermoplastic elastomers
- Electron beam modification of fillers : Electron beam modification of carbon–silica dual phase fillers - Electron beam treatment of silica fillers - Electron beam modification of clay fillers - Electron beam treatment of carbon nanofillers
- Electron beam treatment of filled rubbers and nanocomposites
- Electron beam modification of polymer surfaces
- Electron beam processing of foams
- Applications : Preparation and properties of rubber cable compounds - Preparation and properties of rubber seals - Precuring of tire - Other applications
- Table 1 : Frequency wavelength and Energy of various radiation sources
- Table 2 : Comparison of electron beam and gamma rays.
- Table 3 : Mechanical properties and crosslink densities of compound M1.5/0.5/0–300/0 and M0.5/1.5/0–300/0 irradiated at different doses* (reproduced from Vijayabaskar et al. (2004) with the kind permission of ACS Rubber Division)
- Table 4 : Comparison of Nitrile rubber with different polyfunctional monomers irradiated with different doses at R.T. and 150 °C
- Table 5 : Different types of NR gels and their influence on the properties of NR matrix
- Table 6 : Formulation of an EPDM based cable compound
- Table 7 : Properties of the EPDM cable compound
- Table 8 : Cable composition for diesel locomotives.
- Table 9 : Properties of the cable compound for diesel locomotive
- Table 10 : Comparative report of EB versus chemically crosslinked elastomeric cables
- Table 11 : Comparison of properties of conventional and radiation curable sealing compounds based on NBRDOI : https://doi.org/10.1515/ipp-2021-4211 En ligne : https://drive.google.com/file/d/1psy85_ODMfXnMoy5SuvG-DUnoDkvMkan/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38325
in INTERNATIONAL POLYMER PROCESSING > Vol. 37, N° 5 (2022) . - p. 471-504[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23740 - Périodique Bibliothèque principale Documentaires Disponible Fire protection for railway / Marcus Schäfer in KUNSTSTOFFE INTERNATIONAL, Vol. 101, N° 8 (08/2011)
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Titre : Fire protection for railway Type de document : texte imprimé Auteurs : Marcus Schäfer, Auteur ; Michael Halfmann, Auteur Année de publication : 2011 Article en page(s) : p. 34-36 Langues : Anglais (eng) Catégories : Ignifugeants Composé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface.
Incendies -- Prévention
Matières plastiques dans les trains
Polyamide 6Index. décimale : 668.4 Plastiques, vinyles Résumé : Polyamide 6 with Hazard Level 3 - A Polyamide 6 achieved “HL 3”, which is the highest possible level, and is extraordinary for a flame-retarded thermoplastic material. The level was determined in several tests according to the upcoming European standard ruling fire protection in trains. The material is thus suited for applications such as electrical equipment in the most diverse types of trains. Note de contenu : - Differentiation according to operation and construction classes
- Polymers face high hurdles
- Well suited for electrical
- Low toxicity
- High oxygen index
- Easy-flow meltPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12025
in KUNSTSTOFFE INTERNATIONAL > Vol. 101, N° 8 (08/2011) . - p. 34-36[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 013215 - Périodique Bibliothèque principale Documentaires Disponible Increasing productivity in rail coating & lining facilities without sacrificing quality / Jim Molnar in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 33, N° 8 (08/2016)
[article]
Titre : Increasing productivity in rail coating & lining facilities without sacrificing quality : Six coating experts share ideas Type de document : texte imprimé Auteurs : Jim Molnar, Auteur Année de publication : 2016 Article en page(s) : p. 22-29 Langues : Américain (ame) Catégories : Ateliers de peinture industrielle
Autoclave (technologie)
Caoutchouc
Entretien et réparations
Essais (technologie)
Matières plastiques dans les trains
Productivité
Revêtements en phase aqueuse:Peinture en phase aqueuse
Surfaces -- Nettoyage
Trains -- peintureIndex. décimale : 667.9 Revêtements et enduits Résumé : Each year the Mechanical Association of Railcar Technical Services Protective Coatings Committee assembles to discuss the latest issues affecting the industry. This article is an aggregation of presentations by six railcar coating experts. Note de contenu : - Innovative coatings and linings technology for railcars
- Enhanced throughput with water-based coatings
- Update on rubber lining repair technology
- Cleaning unlined crude oil tank cars in preparation for lining
- Improving shop efficiency with encapsulated media blasting
- Improving sho efficiency with one-coat systems
- FIGURES : A battery of tests, including autoclave and atlas cell, screen interior coating candidates for rigorous exposures - The majority of railroad freight cars are painted with water-based coatings - European railcar paint applicators have embraced the use of water-based materials. Photo courtesy of International Paint - Major railroads and railcar lessors have observed water-based paint lasting in excess of 20 years, with little or no chalking or color change - Curing setup including vacuum film, vacuum blanket, heat blanket, rubber patch, rubber inlay and original rubber - Cutaway of cured patch - Control screen - Corrosion in an unlined crude oil tank car - Close-up of an encapsulated media unit - A schematic of a robotic encapsulated media blasting systemEn ligne : http://www.paintsquare.com/archive/?fuseaction=view&articleid=5883 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28397
in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 33, N° 8 (08/2016) . - p. 22-29[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18252 - Périodique Bibliothèque principale Documentaires Disponible Innovative approach for non-flammable transparent FRP in JEC COMPOSITES MAGAZINE, N° 107 (08-09/2016)
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Titre : Innovative approach for non-flammable transparent FRP Type de document : texte imprimé Année de publication : 2016 Article en page(s) : p. 41-42 Langues : Anglais (eng) Catégories : Composites à fibres de verre
Essais de résilience
IgnifugeantsComposé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface.
Matières plastiques dans les trainsIndex. décimale : 668.4 Plastiques, vinyles Résumé : Various non-flammability solutions are available for FRP materials, for example the use of halogens, phosphoras or inorganic materials such as ATH or silica, but when a high level of non-flammability is required, a high amount of non-flammabte additives is needed, resulting in FRP performance problems (e.g. high viscosity at impregnation or lower strength). Note de contenu : - DEVELOPMENT OF THE LIGHTING COVER : Multilayer composition - Moulding process
- EXPRIMENTAL RESULTS : Total light transmittance - Alcohol flammability test
- FIGURES : 1. Introduction of EXVIEW by newspaper Kahoku Shinpo - 2. Practical application of EXVIEW in a subway station - 3. Old type of polycarbonate cover - 4. Effect of the Claist layer - 5. EXVIEW production process - 6. Effect of a Claist layer in a cone calorimeter test - 7. The Japonese ignition test methodEn ligne : https://drive.google.com/file/d/1odifWNlir47B5N6BLxlKBO4IkrwqCESP/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27774
in JEC COMPOSITES MAGAZINE > N° 107 (08-09/2016) . - p. 41-42[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18289 - Périodique Bibliothèque principale Documentaires Disponible Integrated lightweight rail vehicle composites structures meet high fire requirements in JEC COMPOSITES MAGAZINE, N° 152 (09-10/2023)
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Titre : Integrated lightweight rail vehicle composites structures meet high fire requirements Type de document : texte imprimé Année de publication : 2023 Article en page(s) : p. 45-47 Langues : Anglais (eng) Catégories : Composites à fibres de carbone
Incendies -- Prévention
Industrie ferroviaire -- Matériaux
Matériaux -- Allègement
Matières plastiques dans les trainsIndex. décimale : 668.4 Plastiques, vinyles Résumé : Four specialised companies, investigated different competitive materials and processes to develop a lightweight car body structure meeting the EN-45545 European railway standard for fire safety. Note de contenu : - Lightening strategy
- Manufacturing process : fine-tuning through a scale demonstrator
- Manfuacturijng process : scale-up and real testing validation
- In summary, advantages offered by this technology
- Fig. 1 : Talgo's 3D CAD of a metal train body structure and Tecnalia's 3D CAD of a simplified one-shot composite structure
- Fig. 2 : Meshing and FEM analysis
- Fig. 3 : Tecnalia's fire-smoke-toxicity tests
- Fig. 4 : Conceptual integration structure and bottom face of the scaled demonstrator of the floor coupler area
- Fig. 5 : Assembly and inner view of the CFRP car body
- Fig. 6 : Full-scale demonstrator of a complete section
- Fig. 7 : Demonstrator exhibited at the JEC World Mobility Planet 2023En ligne : https://drive.google.com/file/d/1xZByBLMu40ZPdv3KR0N1B_qsXEpz_y0u/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40573
in JEC COMPOSITES MAGAZINE > N° 152 (09-10/2023) . - p. 45-47[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24157 - Périodique Bibliothèque principale Documentaires Disponible