Accueil
Catégories
Ajouter le résultat dans votre panier Affiner la recherche
Etendre la recherche sur niveau(x) vers le bas
Effect of epoxy resin-silane on physical properties of coated films on steel surfaces / S. Kiatkamjornwong in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 87, B3 (09/2004)
[article]
Titre : Effect of epoxy resin-silane on physical properties of coated films on steel surfaces Type de document : texte imprimé Auteurs : S. Kiatkamjornwong, Auteur ; W. Yusabai, Auteur Année de publication : 2004 Article en page(s) : p. 149-157 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Epoxydes
Métaux -- Revêtements protecteurs
Réaction de couplage
Résistance thermique
Revêtements -- Propriétés mécaniques
Revêtements organiques
SilanesIndex. décimale : 667.9 Revêtements et enduits Résumé : Physical and mechanical properties of epoxy resin-based coatings were improved using either a combination of a silane coupling agent aminoethylaminopropyltrimethoxysilane (AEAPS) and an epoxy resin, or an epoxy resin alone. An epoxy resin, with added AEAPS at the concentration of 1 or 3wt% at a film thickness of 25 to 100µm, showed better adhesion on steel surfaces than the epoxy resin alone. The epoxy resin, cured with an AEAPS concentration of 7wt% at a film thickness of 100µm, could withstand heat at 300°C for 20 minutes. The heat-resistance result was measured in terms of colour difference (ΔE) by a colorimetric method, from which the maximum ΔE between the coated film with the epoxy resin-AEAPS and the epoxy resin alone was 3.4. The heat resistance of coated films of epoxy resin-AEAPS tested by thermo-gravimetric analysis showed that the heat resistance increased with increasing AEAPS concentration. The Si-O-Si cross-linking position, found by Fourier transform infrared spectroscopy (FTIR), confirmed its effect on heat endurance and corrosion prevention. The authors found that the use of AEAPS of 7wt% for a 100µm film could prevent the occurrence of corrosion under a 1000-hour salt-spray exposure. The corrosion rate was found to be 0.39 mil (9.9µm) per year. The flooring with AEAPS addition to the epoxy resin was better than that with cycloaliphatic amine. The addition of AEAPS of 15.5wt% improved the film mechanical properties, hardness, compressive strength and chemical resistance in comparison with the neat epoxy resin or the combination of AEAPS and cycloaliphatic amine. Note de contenu : - EXPERIMENTAL : Epoxy resin coating on steel surface - Epoxy resin flooring on steel surface
- CHARACTERISATION AND TESTING : Epoxy resin-based coating
- RESULTS AND DISCUSSION : Evaluation of epoxy-coated film by colorimetry - Thermal properties of the cured films - Effect of silane content on the adhesion of the epoxy coating - Effect of silane content in the epoxy-based coating on corrosion resistance - Effect of silane content on the mechanical properties of the epoxy-based flooring
- Table 1 : Epoxy coating composition
- Table 2 : Epoxy flooring composition
- Table 3 : Colour difference (ΔE) of the colour changes in the epoxy/AEAPS coating at different AEAPS (wt%) concentrations caused by heat exposure at various film thicknesses
- Table 4 : Ahesive tape test on epoxy/silane coated film
- Table 5 : Effect of salt-spray exposure time and coating thicknesss on cut usting and surface appearance
- Table 6 : Hardness of epoxy/AEAPS flooringDOI : 10.1007/BF02699629 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699629.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5452
in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 87, B3 (09/2004) . - p. 149-157[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 000390 - Périodique Bibliothèque principale Documentaires Disponible Effect of human body temperature on new multilayer composite shield in pacemaker / Tahar Merizgui in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 29, N° 1 (02/2019)
[article]
Titre : Effect of human body temperature on new multilayer composite shield in pacemaker Type de document : texte imprimé Auteurs : Tahar Merizgui, Auteur ; Abdechafik Hadjadj, Auteur ; Mecheri Kious, Auteur ; Bachir Gaoui, Auteur Année de publication : 2019 Article en page(s) : p. 27-32 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Composites
Conduction électrique
Résistance thermique
Silicium
Stimulateurs cardiaques
Structures multicouches
TitaneIndex. décimale : 611.1 Appareil cardio-vasculaire Résumé : This paper presents a novel method for evaluating the effect of human body temperature on the electromagnetic shielding effectiveness (SE) of pacemaker. There are many sources of electromagnetic interference that interact with pacemakers: Cell phones may be considered responsible for electromagnetic interference EMI when they were held in the same part with the pacemaker; also, the magnetic resonance imaging makes a serious problem and must be avoided. In this paper, a new multilayer composite was prepared and built from alternating layers, the composite is reinforced by Titanium fibres and the dielectric layers made from the Silicon material, the dielectric layers are sandwiched between composites with Ti fibres symmetrically. Ti is the most widely used metal for pacemakers due to its high biocompatibility with the human body. Silicon has the advantages for being resistant material of temperature, lightweight, and its flexibility (bendable structure). The obtained simulation results prove the effectiveness of the proposed shield in the temperature range 37-41 °C. this is mainly due to the multi-reflection mechanism between the layers due to the high mismatched impedances. Note de contenu : - MODEL SETUP : Multi-layer structure composite as EMI shielding materials - The effect of temperature on the proposed multilayer composite
- RESULTS AND DISCUSSION : The effect of temperature on EMI shielding properties - EM parameter analysis of the proposed sample
- Table 1 : The electrical conductivity obtained from the proposed sample
- Table 2 : EMI shielding performance of typical materialsDOI : https://doi.org/10.18280/rcma.290105 En ligne : https://www.iieta.org/download/file/fid/640 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34734
in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES > Vol. 29, N° 1 (02/2019) . - p. 27-32[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 22404 - Périodique Bibliothèque principale Documentaires Disponible Effect of hydrophilic chain extenders on properties of hyperbranched waterborne polyurethane / Wang Xuechuan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 2 (03-04/2016)
[article]
Titre : Effect of hydrophilic chain extenders on properties of hyperbranched waterborne polyurethane Type de document : texte imprimé Auteurs : Wang Xuechuan, Auteur ; Ren Jing, Auteur ; Qiang Taotao, Auteur Année de publication : 2016 Article en page(s) : p. 62-66 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Composés organiques -- Synthèse
Cuirs et peaux -- Finition
Diméthyl butanoïque, Acide
Essais de résilience
Essais dynamiques
Mouillabilité
Polymères -- Analyse
Polymères -- Propriétés mécaniques
Polymères en émulsion
Polymères ramifiés
Polyuréthanes
Propionique diméthylol, Acide
Résistance chimique
Résistance thermiqueIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Using hydroxyl terminated hyperbranched polymer as the core, dimethylol propionic acid (DMPA), dimethylolbutanoic acid (DMBA), carboxylic acid type monomer (DMCA) as the hydrophilic chain extenders respectively, three different types of hyperbranched waterborne polyurethane leather finishing agents were synthesized. The structures and properties of the products were characterized by FT-IR, SEM, AFM and TG. Simultaneously, the mechanical properties, surface wettability and water and solvent resistance of three films were studied. The results found the order of crystallinity to be : DMBA-HWPU Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Sources - The synthesis of DMCA - The synthesis of hyperbranched waterborne polyurethane
- RESULTS AND DISCUSSION : Fourier transforms infrared spectroscopy - X-ray diffraction - Scanning electron microscopy (SEM) - Atomic force microscope (AFM) - Emulsion particle size - Simultaneous thermal analysis curves - Physical and mechanical propertiesEn ligne : https://drive.google.com/file/d/1GQlPV_HUIq7F-tUUWLvt_sE5TcVb2FzQ/view?usp=drive [...] Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26088
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 100, N° 2 (03-04/2016) . - p. 62-66[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 17955 - Périodique Bibliothèque principale Documentaires Disponible Effect of prepolymerization time on morphology and properties of epoxy-modified bismaleimide foams / Xiaoli Liu in INTERNATIONAL POLYMER PROCESSING, Vol. XXVII, N° 5 (11/2012)
[article]
Titre : Effect of prepolymerization time on morphology and properties of epoxy-modified bismaleimide foams Type de document : texte imprimé Auteurs : Xiaoli Liu, Auteur ; H. Lu, Auteur ; L. Xing, Auteur Année de publication : 2012 Article en page(s) : p. 617-625 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alliages polymères
BismaléimideRésine thermodurcissable faisant partie de la famille des polyimides d'addition et donc des polymères thermostables (bonne résistance à la chaleur). Leurs particularités principales sont :
• caractéristiques mécaniques élevées en traction, flexion et choc ;
• excellente conservation des propriétés mécaniques en température (200 à 250°C) pendant des milliers d'heures ;
• bonne inertie chimique aux huiles, solvants, kérosène, fréon ;
• très bonne tenue à la flamme ;
• caractéristiques diélectriques élevées conservées à haute température ;
• très bonne tenue aux radiations ;
• absence de porosités.
Leurs limites d'utilisation sont :
• mauvaise tenue aux acides minéraux concentrés ;
• mauvaise tenue aux solutions basiques ;
• mauvaise résistance à l'arc électrique.
La mise en œuvre peut être faite par voie humide ou par voie sèche (à l'aide de préimprégnés sous presse ou en autoclave). Les préimprégnés peuvent se conserver plus d'un an à température ambiante.
Contraintes (mécanique)
Epoxydes
Mousses plastiques
Mousses plastiques -- Propriétés mécaniques
PrépolymérisationConsiste à faire atteindre, à un élément drapé d'une pièce, un état de début de polymérisation suffisant pour acquérir la stabilité géométrique et la pégosité permettant sa manipulation.
Cette opération a également pour but de faciliter la mise en œuvre du produit, par exemple :
• limiter le fluage ;
• limiter le taux de matières volatiles ;
• diminuer le collant d'un préimprégné ...
Cette opération peut également consister à amorcer une légère polymérisation préalable à un mélange, une résine ou un préimprégné afin de le rendre plus adapté à sa mise en œuvre ultérieure.
La prépolymérisation permet le stockage de sous-ensembles d'une pièce en attendant l'assemblage en monophase à l'occasion de la polymérisation de l'ensemble des éléments de la pièce.
Résistance thermiqueIndex. décimale : 668.4 Plastiques, vinyles Résumé : Epoxy-modified bismaleimide (BMI) foams were prepared through prepolymerization and foaming. Density-adjustable BMI foams with closed-cell structures were produced. The influence of prepolymerization time on bubble growth and morphology, as well as the compressive and heat resistant properties of the foams, were thoroughly investigated. BMI prepolymerization was an effective method for controlling the bubble growth rate, the bubble size and its distribution, and the foam density. As the prepolymerization time increased, the matrix viscosity, the number of cells per unit volume and the foam density increased, whereas, the bubble growth rate and cell size decreased, and the cell size distribution became narrower. The compressive strength and modulus increased with increasing prepolymerization time. The dimensional stability temperatures of the BMI foams were all above 200°C, as determined by their base materials, and were unaffected by prepolymerization time. Note de contenu : - EXPERIMENTAL : Materials - Preparation of BMI based foams - Density and viscosity - Scanning electron microscope observations - Compression test - Heat resistance
- RESULTS AND DISCUSSION : BMI foaming process - Bubble growth at different prepolymerization times - Bubble morphology at different prepolymerization times - Mechanical properties and heat resistanceDOI : 10.3139/217.2629 En ligne : https://drive.google.com/file/d/1C498vyzsIv6fBCS6LBe16GRjGvR5BOuQ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16644
in INTERNATIONAL POLYMER PROCESSING > Vol. XXVII, N° 5 (11/2012) . - p. 617-625[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 14335 - Périodique Bibliothèque principale Documentaires Disponible Effect of processing conditions on the rheological and mechanical properties of composites based on a PBS matrix and enzymatically treated date palm fibers / Rania Chaari in INTERNATIONAL POLYMER PROCESSING, Vol. 38, N° 1 (2023)
[article]
Titre : Effect of processing conditions on the rheological and mechanical properties of composites based on a PBS matrix and enzymatically treated date palm fibers Type de document : texte imprimé Auteurs : Rania Chaari, Auteur ; Fatma Kharrat, Auteur ; Mohamed Khlif, Auteur ; Chedly Bradai, Auteur ; Catherine Lacoste, Auteur ; Philippe Dony, Auteur Année de publication : 2023 Article en page(s) : p. 19-29 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse morphologique
Caractérisation
Composites à fibres végétales
Composites à fibres végétales -- Propriétés mécaniques
Essais dynamiques
Fibres de palmier dattier
Mélange
Polybutylène succinate
Résistance thermique
Rhéologie
Traitement enzymatiqueIndex. décimale : 668.4 Plastiques, vinyles Résumé : The rheological properties of biocomposites can change depending on the polymer, fiber type, fiber size and processing conditions. In this work, biodegradable PBS composites filled with raw and enzymatically treated date palm fibers were processed using an internal mixer. The influence of the processing conditions, namely filler concentration, rotor of the mixer rotational speed, as well as the type of the enzymatic fiber treatment on PBS (Poly Butylene Succinate)/date palm fiber composites were studied by measuring the torque and the temperature in real time during melt processing. A rheological analysis was also carried out by performing time and multi-wave-frequency sweeps. It was found that the stabilization torque increased with increasing fiber loading and rotor rotational speed, indicating a higher viscosity. An enhancement of the melting process occurred with modified fibers, which was explained by the decrease in the fiber diameter, denoting cellulose micro-fibrils separation by enzymes action. These composites were characterized by a better thermal resistance and mechanical stiffness compared to those based on raw fibers at the same loading rate. Note de contenu : - MATERIALS : Fiber modification - A fiber size analysis - Manufacturing of the PBS-DPF composites - Morphology analysis - Torque and temperature of the composites during mixing at different operating conditions - Rheological analysis - Tensile tests
- RESULTS AND DISCUSSION : Fiber size distribution - Morphological characterization - Torque and temperature of the composites in the internal mixer at different operating conditions - Rheological characterization - Tensile characterizationDOI : https://doi.org/10.1515/ipp-2022-4251 En ligne : https://drive.google.com/file/d/182C-yWRVGzF6k6TrrMUdFw-y8bmvqvIo/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39191
in INTERNATIONAL POLYMER PROCESSING > Vol. 38, N° 1 (2023) . - p. 19-29[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24052 - Périodique Bibliothèque principale Documentaires Disponible Effect of retanning agents on dry heat resistance of leathers / Chao Wu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 8 (08/2013)
PermalinkPermalinkLes élastomères fluorosilicones à la conquête du turbodiesel / Dave Lawson in PLASTIQUES & CAOUTCHOUCS MAGAZINE, N° 844 (11/2006)
PermalinkEngineering thermosets for under-the-hood applications / Frank Bayerl in JEC COMPOSITES MAGAZINE, N° 87 (03/2014)
PermalinkEnvironmentally-friendly, heat-resistant profiles / Kevin Moser in KUNSTSTOFFE INTERNATIONAL, Vol. 104, N° 9 (09/2014)
PermalinkEvolution and harmonization of aerospace prepregs in JEC COMPOSITES MAGAZINE, N° 89 (05/2014)
PermalinkEvolution des caoutchoucs utilisés sous capot / Michel Biron in CAOUTCHOUCS & PLASTIQUES, N° 789 (10/2000)
PermalinkEvolution des fibres chimiques à usages techniques / Guy Némoz in L'INDUSTRIE TEXTILE, N° 1384 (03-04/2007)
PermalinkFabrication of fluorine-free superhydrophobic coatings from montmorillonite with mechanical durability and chemical stability / Mengnan Qu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 4 (07/2019)
PermalinkLa famille s'agrandit avec l'Urepan / Michel Biron in CAOUTCHOUCS & PLASTIQUES, N° 747 (02/1996)
PermalinkFluoroélastomères aux performances améliorées / S. Bowers in CAOUTCHOUCS & PLASTIQUES, N° 816 (10/2003)
PermalinkForecast bright for polysiloxanes / Karl-Heinz Kaesler in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 198, N° 4521 (02/2008)
PermalinkFrom pig fat to polysiloxane / Peter Bock in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 34, N° 10 (10/2017)
PermalinkFunctionality and colour - improving paint systems with iron oxide pigments / Stephan Spiegelhauer in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 212, N° 4675 (06/2022)
PermalinkFurther increases in heat resistance / Albert Flepp in KUNSTSTOFFE INTERNATIONAL, Vol. 104, N° 8 (08/2014)
Permalink