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JOURNAL OF COATINGS TECHNOLOGY (JCT) . Vol. 70, N° 885ICE'98 convention issueMention de date : 10/1998 Paru le : 01/10/1998 |
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Ajouter le résultat dans votre panierEffect of weathering on the stress distribution and mechanical performance of automotive paint systems / Mark E. Nichols in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 70, N° 885 (10/1998)
[article]
Titre : Effect of weathering on the stress distribution and mechanical performance of automotive paint systems Type de document : texte imprimé Auteurs : Mark E. Nichols, Auteur ; C. A. Darr, Auteur Année de publication : 1998 Article en page(s) : p. 141-149 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse thermomécanique
Automobiles -- Revêtements:Automobiles -- Peinture
Contraintes (mécanique)
Couches minces multicouches
Eléments finis, Méthode des
Revêtement en plastiques -- Effets de l'humidité
Revêtements
Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniquesIndex. décimale : 667.9 Revêtements et enduits Résumé : The sources of stress in complete automotive paint systems have been identified and measured as a function of weathering. In addition to the stresses developed during cure, the main sources of stresses developed during exposure are thermal expansion coefficient mismatch, humidity expansion mismatch, and densification of the clearcoat. Stresses generally increase during weathering due to a slow densification of the clearcoat and increasing water absorption and desorption stresses. Finite element analysis (FEA) was used to compute the stress distribution in full paint systems. Stresses are typically in-plane and highest in the primer and clearcoat. Stresses approaching those required to propagate cracks can be attained in weathered paint systems. The presence of flaws, either cracks or incipient delaminations, will lead to large stress concentrations that can give rise to peeling forces not present in coatings without cracks. Note de contenu : - EXPERIMENTAL : Materials - Accelerated weathering - Dynamic mechanical analysis (DMA) and thermomechanical analysis (TMA) - Density - Humidity stresses - Modeling of stresses in multilayer coatings
- RESULTS : Thermoelastic constants of individual layers - Humidity stresses in single layers - Densification stresses - Multilayer stressesPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18044
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 70, N° 885 (10/1998) . - p. 141-149[article]Réservation
Réserver ce documentInvestigation of the effects of formulation on selected properties of UV curable IPN coatings / L. N. Price in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 70, N° 885 (10/1998)
[article]
Titre : Investigation of the effects of formulation on selected properties of UV curable IPN coatings Type de document : texte imprimé Auteurs : L. N. Price, Auteur ; R. A. Ryntz, Auteur ; X. H. Li, Auteur ; A. H. Huetos, Auteur ; H. X. Xiao, Auteur ; K. C. Frisch, Auteur ; B. Suthar, Auteur Année de publication : 1998 Article en page(s) : p. 151-156 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Copolymère uréthane acrylique
Formulation (Génie chimique)
Photoamorceurs (chimie)
Polyaddition
Réseaux polymères
Réticulation (polymérisation)
Revêtements
Revêtements -- Séchage sous rayonnement ultravioletIndex. décimale : 667.9 Revêtements et enduits Résumé : Ultraviolet curable coatings based on urethane-acrylic resins were prepared by free radical polymerization. The effects of photoinitiators on the curing reaction and the influence of polyol types and dimethylopropionic acid (DMPA) amounts on the properties of UV curable coatings prepared by free radical polymerization (UVF) were investigated. The effects of polymerization (UVC) and the consequences of postcuring conditions on the properties of UVC were evaluated. The interpenetrating polymer network (IPN) containing UV curable coatings (UVIPN), which were composed of UVF and UVC at different ratios (by weight), were prepared. The properties of UVIPN with varied UVF/UVC ratios were studied. Note de contenu : - EXPERIMENTAL : Raw materials - Preparation of free radical UV curable coatings based on urethane-modified acrylics - Preparation of cationic UV curable coatings based on epoxy - Preparation of IPN UV curable coatings - Measurement of properties
- RESULTS : Free radical UV curable coatings based on urethane-modified acrylics - Cationic UV curable coatings based on epoxy - UV curable IPN coatings based on free-radical and cationic UV curable mechanismsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18045
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 70, N° 885 (10/1998) . - p. 151-156[article]Réservation
Réserver ce documentDefoamer selection in waterborne coatings / Robin A. Reinhardt in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 70, N° 885 (10/1998)
[article]
Titre : Defoamer selection in waterborne coatings Type de document : texte imprimé Auteurs : Robin A. Reinhardt, Auteur ; Wernfried Heilen, Auteur ; Ellen Walhorn, Auteur ; Stefan Silber, Auteur ; Jay W. Adams, Auteur Année de publication : 1998 Article en page(s) : p. 157-160 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antimousse
Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- AdditifsIndex. décimale : 667.9 Revêtements et enduits Résumé : Waterborne coatings systems differ from solventborne systems in a number of ways. One key difference is the fact that water displays a high surface tension, which must be lowered to allow spreading over low-energy substrates. But solving this problem often leads to another problem: the surfactants used to lower surface tension tend to stabilize foam. This foam, in turn, must be destabilized during manufacture and application through the use ofa defoamer. Choosing the proper defoamer for any given system has always been a matter of empirical selection. But today, new methods of analysis can help with that selection process. This article presents new and existing research in the areas offoam control and defoamer selection that can help minimize the amount of empirical work needed. Note de contenu : - FOAM CONTROL
- CAUSES OF FOAM
- DEFOAMER CHEMISTRY FOR AQUEOUS SYSTEMS : Active substances - Surface-active agents - Carrier fluids
- FACTORS THAT INFLUENCE DEFOAMER SELECTION
- WHAT DETERMINES DEFOAMER EFFICIENCY
- DEFOAMER INCORPORATION
- TEST METHODS
- DEFOAMER EMULSIONS VERSUS COMPOUNDS
- DEFOAMER PERSISTENCE AND STORAGE STABILITYPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18046
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 70, N° 885 (10/1998) . - p. 157-160[article]Réservation
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