Accueil
Résultat de la recherche
2 résultat(s) recherche sur le tag 'différentielle''
Ajouter le résultat dans votre panier Affiner la recherche Générer le flux rss de la recherche
Partager le résultat de cette recherche
Blends of cardanol-based epoxidized novolac resin and CTBN for application in surface coating : a study on thermal, mechanical, chemical, and morphological characteristics / Ranjana Yadav in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 7, N° 5 (09/2010)
[article]
Titre : Blends of cardanol-based epoxidized novolac resin and CTBN for application in surface coating : a study on thermal, mechanical, chemical, and morphological characteristics Type de document : texte imprimé Auteurs : Ranjana Yadav, Auteur ; Deepak Srivastava, Auteur Année de publication : 2010 Article en page(s) : p. 557-568 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Revêtements Tags : Cardanol 'Résine novolac' 'Carboxyl-terminated butadiene acrylonitrile' (CTBN) 'Analyse calorimétrique différentielle' (DSC) thermogravimétrique' (TGA) Index. décimale : 667.9 Revêtements et enduits Résumé : Blend samples of cardanol-based epoxidized novolac resin and different weight percentages of carboxyl-terminated butadiene acrylonitrile (CTBN) were developed and cured with stoichiometric amounts of aliphatic amine. The formation of various products during the curing of blend samples has been studied by Fourier-transform infrared spectroscopy. The dynamic differential scanning calorimeter scans showed that the pure epoxies and their blend samples with CTBN cured in the temperature range of 100–150°C. The blend sample containing 15 wt% CTBN showed the least cure time (at 120°C) among all other blend samples. Upon evaluation, it was found that blend samples exhibit better properties compared to pure epoxy resin in terms of increase in impact strength and elongation-at-break of the casting and gloss, scratch hardness, adhesion, and flexibility of the film. The improvement in these properties indicates that the rubber modified resin would be more durable than the epoxy based on cardanol. Chemical and morphological properties of the formulated resins were also determined. The thermal stability of the blend samples containing 15 wt% CTBN in epoxy resin was the highest among all other prepared systems. The blend morphology, studied by scanning electron microscope, showed the presence of precipitated discrete rubber particles, which dispersed throughout the epoxy matrix—i.e., they revealed the presence of two-phase morphological features. DOI : 10.1007/s11998-009-9235-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-009-9235-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9911
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 7, N° 5 (09/2010) . - p. 557-568[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 012448 - Périodique Bibliothèque principale Documentaires Disponible General aspects of yield stress fluids - Terminology and definition of viscosity / Martin Boisly in APPLIED RHEOLOGY, Vol. 24, N° 1 (2014)
[article]
Titre : General aspects of yield stress fluids - Terminology and definition of viscosity Type de document : texte imprimé Auteurs : Martin Boisly, Auteur ; Markus Kästner, Auteur ; Jörg Brummund, Auteur ; Volker Ulbricht, Auteur Année de publication : 2014 Article en page(s) : 11 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Fluides non newtoniens
Fluides, Mécanique des
Rhéologie
ViscositéTags : 'Fluide de stress' 'Viscosité différentielle' Viscosité apparente' 'Contrainte d'équilibre' 'Elément friction' 'Élément Bingham' Index. décimale : 532.05 Mécanique des fluides et des liquides - Dynamique (cinétique et cinématique) Résumé : This work contributes to general theoretical aspects of yield stress fluids with significance for practical phenomenological material modeling. It introduces a terminology so that the material class 'yield stress fluid' is defined and can be distinguished from the terms `solid' and liquide. This new material classification is based on two criteria, the equilibrium relation and the flow function. In line with this terminology, an experimental procedure for classifying the material behavior is presented. The second key aspect of this paper is a discussion on the proper definition of the term 'viscosity'. The benefit of the differential viscosity over the dynamic viscosity in case of non-Newtonian fluids in general is worked out. This is shown by the most ele-mentary yield stress fluid, the friction element, because it is the basis of the yield stress concept. Its constitutive equations are given for positive as well as negative strain rates and are also able to represent the preyield behavior. The theory presented in this article is also applied to the Maxwell, Kelvin-Voigt, and Bingham element to demonstrate the working principle. Note de contenu : - SPLIT OF THE TOTAL STRESS INTO AN EQUILIBRIUM AND OVERSTRESS
- DIFFERENTIAL VISCOSITY DEFINED BY THE STEADY STATE MATERIAL RESPONSE TO A CONSTANT STRAIN RATE LOADING
- CLASSIFICATION OF MATERIAL BEHAVIOR INTO THREE TYPES : SOLIDS, LIQUIDS AND YIELD STRESS FLUIDS
- DISCUSSION OF THE DIFFERENTIAL VISCOSITY AND DEMONSTRATION OF THE FUNCTIONALITY OF THE MATERIAL CLASSIFICATION BY STANDARD AND EXTENDED RHEOLOGICAL ELEMENTS : Constitutive equations of standard rheological elements used to illustrate the theoretical statements of this article - Illustrating the benefit of a differential viscosity by standard rheological elements - Application of the material classification to standard rheological elements - Application of the material classification to extended rheological elementsRéférence de l'article : 14578 DOI : 10.3933/ApplRheol-24-14578 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21555
in APPLIED RHEOLOGY > Vol. 24, N° 1 (2014) . - 11 p.[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 16175 - Périodique Bibliothèque principale Documentaires Disponible