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Measurement approaches to develop a fundamental understanding of scratch and mar resistance / Mark R. van Landingham in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 1, N° 4 (10/2004)
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Titre : Measurement approaches to develop a fundamental understanding of scratch and mar resistance Type de document : texte imprimé Auteurs : Mark R. van Landingham, Auteur ; Li-Piin Sung, Auteur ; Neng-Kai Chang, Auteur ; Tsun Yen Wu, Auteur ; Shuo-Hung Chang, Auteur ; Vincent Jardret, Auteur Année de publication : 2004 Article en page(s) : p. 257-266 Note générale : Bibliogr. Langues : Américain (ame) Tags : Propriété mécanique Etude expérimentale Viscoélasticité Modélisation comparative Microscopie confocale Indentation Méthode mesure Résistance rayure Dureté Méthacrylate de méthyle polymère Epoxyde résine Index. décimale : 667.9 Revêtements et enduits Résumé : Instrumented indentation and confocal microscopy were used to characterize the surface mechanical response of polymeric materials. Viscoelastic behavior was measured using instrumented indentation. A model based on the contact between a rigid probe and a viscoelastic material was used to calculate values for the creep compliance and stress relaxation modulus for two polymeric materials, epoxy and poly(methyl methacrylate) or PMMA. Scratch testing was performed on these materials with various probes under a variety of conditions, and confocal microscopy was used to characterize the resulting deformation. Relationships among viscoelastic behavior, scratch damage, and appearance are currently being explored using these methods along with finite element modeling. DOI : 10.1007/s11998-004-0028-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-004-0028-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3857
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 1, N° 4 (10/2004) . - p. 257-266[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000588 - Périodique Bibliothèque principale Documentaires Disponible Mechanical surface characterization / A. Krupicka in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 75, N° 939 (04/2003)
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Titre : Mechanical surface characterization : a promising procedure to screen organic coatings Type de document : texte imprimé Auteurs : A. Krupicka, Auteur ; M. Johansson, Auteur ; A. Hult, Auteur ; G. Favaro, Auteur Année de publication : 2003 Article en page(s) : p. 19-27 Note générale : Bibliogr. Langues : Américain (ame) Tags : 'Essai de traction' Characterization Fiabilité Reproductibilité 'Etude expérimentale' rayage' Indentation 'Analyse surface' 'Propriété mécanique' Feuil Nanotechnologie 'Matériau revêtement' Peinture Index. décimale : 667.9 Revêtements et enduits Résumé : Two ductile coating materials were subjected to a combined indentation and scratch test procedure designed to screen a predetermined pattern of many small sample surfaces in a limited time. The screening of 50 surface spots ordered in a matrix pattern on the surface was carried out in 4.5 hr. The test provides reproducible data in terms of indentation modulus, elastic recovery, scratch penetration depth, and scratch residual depth, and also offers the possibility of detecting critical mechanical transitions such as rupture. The presented procedure produces sufficient data in a limited time scale to fulfill the requirements for a fast method to screen coating compositions. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5591
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Code-barres Cote Support Localisation Section Disponibilité 000564 - Périodique Bibliothèque principale Documentaires Disponible On material characterization of paper coating materials by microindentation testing / Christophe Barbier in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 2, N° 6 (04/2005)
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Titre : On material characterization of paper coating materials by microindentation testing Type de document : texte imprimé Auteurs : Christophe Barbier, Auteur ; Michael Karathanasis, Auteur ; Nils Hallbäck, Auteur ; Sören Östlund, Auteur ; Per-Lennart Larsson, Auteur Année de publication : 2005 Article en page(s) : p. 463-471 Note générale : Bibliogr. Langues : Américain (ame) Tags : Microindentation 'Propriété mécanique' 'Etude expérimentale' Caractérisation 'Papier couché' Utilisation 'Méthode des éléments finis' Modélisation comparative' non destructive' Indentation de mesure' 'Résistance à la rupture' en traction' 'Matériau revêtement' Argile Carbonate calcium' renforcé dispersion' Latex Polymère composite' Index. décimale : 667.9 Revêtements et enduits Résumé : Microindentation as a method for determining important material properties of paper coating materials is studied experimentally and numerically. The bulk of the investigation is concentrated upon the short-lived elastic part of a spherical indentation test, but determination of the failure stress of the coating is also discussed. The results indicate that microindentation can be a powerful tool for material characterization of these materials, but only if careful efforts are made to account for the influence from plasticity as well as from boundary effects. DOI : 10.1007/BF02733889 En ligne : https://link.springer.com/content/pdf/10.1007%2FBF02733889.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3841
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Code-barres Cote Support Localisation Section Disponibilité 001483 - Périodique Bibliothèque principale Documentaires Disponible Visco-elastic visco-plastic analysis of scratch resistance of organic coatings / Vincent Jardret in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 2, N° 8 (10/2005)
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Titre : Visco-elastic visco-plastic analysis of scratch resistance of organic coatings Type de document : texte imprimé Auteurs : Vincent Jardret, Auteur ; Rose Ann Ryntz, Auteur Année de publication : 2005 Article en page(s) : p. 591-598 Note générale : Bibliogr. Langues : Américain (ame) Tags : Propriété rhéologique Aminoplaste Etude expérimentale Elastoplasticité Viscoélasticité Modélisation comparative Relation contrainte déformation Indentation Méthode mesure Thermodurcissable Oléfine polymère mécanique Mélamine résine Dureté traction Ester Caoutchouc thermoplastique Acrylique dérivé Endommagement Peinture haute teneur solide Matériau revêtement Résistance rayure Index. décimale : 667.9 Revêtements et enduits Résumé : The sensitivity of automotive coatings to scratching, particularly coatings for plastics, has been a growing conceal among automakers. Scratching may result from such predelivery events as polishing minor defects embeddedin the paint, or postdelivery events such as car wash bristles, dirt embedded under a cloth utilized in polishing the car, tree branches, and the like. Warranty cannot separate out which event is the more prevalent (e.g., predelivery or postdelivery to the customer) form of damage on plastics. Data available on coatings for metal, however, does suggest that isocyanate-based crosslinked systems perform more poorly than their melamine-based crosslinked counterparts when exposed to in plant (predelivery) handling. Coatings on plastics, while lower in modulus than coatings on steel, are still subject to scratch events, albeit they have a greater tendency to "self-heal" once scratching events have occurred. This work attempts to correlate the scratch resistance behavior of three different one-component hydroxyl-functional acrylic or polyester-acrylic-melamine-crosslinked systems. Relationships between the tensile and indentation properties of the coatings were found to be related to the initial warranty data of the coating systems. Most importantly, it was apparent that the critical depth to fracture of the flexible coatings may be the relevant indicator of field performance for coatings on plastics. For metals, the relevant indicator to field performance is often only critical load to fracture, negating the influence of indentation depth. This variance is important to consider since coatings on plastic are often softer and more resilient to surface abrasions than their counterparts on metal. DOI : 10.1007/BF02774588 En ligne : https://link.springer.com/content/pdf/10.1007%2FBF02774588.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3784
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Code-barres Cote Support Localisation Section Disponibilité 003121 - Périodique Bibliothèque principale Documentaires Disponible Structure/property relationships in flexible alkoxysilane automotive coatings / Phillip V. Yaneff in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 74, N° 933 (10/2002)
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Titre : Structure/property relationships in flexible alkoxysilane automotive coatings Type de document : texte imprimé Auteurs : Phillip V. Yaneff, Auteur ; Karlis Adamsons, Auteur ; Rose Ann Ryntz, Auteur ; Dottie Britz, Auteur Année de publication : 2002 Article en page(s) : p. 135-141 Note générale : Bibliogr. Langues : Américain (ame) Tags : Silane(alcoxy) polymère Vieillissement Dégradation Essai mécanique Vernis Résistance intempérie Contrainte compression Cisaillement Indentation rayure Flexibilité Feuil Propriété Liant Formulation Relation structure propriété Industrie automobile Peinture Matériau revêtement Index. décimale : 667.9 Revêtements et enduits Résumé : Flexible automotive coatings are susceptible to scratch and mar damage, especially during finishing and assembly operations. One-component (1K) flexible clearcoats exhibit very good scratch and mar resistance, but unfortunately suffer from poor durability and environmental etch resistance. Two-component clearcoats offer improvements in both etch and durability, but at the expense of scratch and mar. In this paper, the concept and properties of 1K flexibilized silane clearcoats for use on automotive plastics will be introduced and their structure/ property relationships examined as they apply to scratch and mar. The role of coating crosslink density, toughness, glass transition temperature (Tg), and surface profile on the scratch damage of coated plastic substrates will be described. In addition, a new scratch methodology, termed Scratcho, is utilized to determine relative scratch performance and is compared to conventional scratch resistance testing. Results to date indicate that hardness, as affected by the glass transition temperature, and crosslink density, as it contributes to higher essential work values, both affect resultant scratch propensityofthe flexible coatings. The relative ranking of different-coating systems employing alternate crosslinkers (e.g., isocyanate and melamine) is also presented and compared to the newly developed silane crosslinked coatings. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5620
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Code-barres Cote Support Localisation Section Disponibilité 001244 - Périodique Bibliothèque principale Documentaires Disponible