Aller sur edunet
Accueil
Détail de l'auteur
Auteur Phillip V. Yaneff |
Documents disponibles écrits par cet auteur
Ajouter le résultat dans votre panier Affiner la rechercheCrosslinking vs. interdiffusion rates in melamine-formaldehyde cured latex coatings : a model for waterborne automotive basecoat / Mitchell A. Winnik in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 71, N° 892 (05/1999)
Titre : Crosslinking vs. interdiffusion rates in melamine-formaldehyde cured latex coatings : a model for waterborne automotive basecoat Type de document : texte imprimé Auteurs : Mitchell A. Winnik, Auteur ; Patrick Pinenq, Auteur ; Christian Krüger, Auteur ; Jianxin Zhang, Auteur ; Phillip V. Yaneff, Auteur Année de publication : 1999 Article en page(s) : p. 47-60 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Automobiles -- Revêtements:Automobiles -- Peinture
Copolymère mélamine-formaldéhyde
Polyacrylates
Réticulation (polymérisation)
Revêtements en phase aqueuse:Peinture en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : Designing optimal formulations for automotive waterborne basecoats can be fairly complex, often requiring knowledge of events that occur at the molecular level. The ultimate performatce of the coating can depend upon the success with which this knowledge is applied. We examine a system in which an aqueous dispersion of an acrylic latex with -OH functionality reacts with a melamine derivative when heated. We use fluorescence-labeling and energy transfer measurements to obtain information on the relative rates of crosslinking and interparticle polymer diffusion in these films. We show that temperature and particle morphology play an important role in the development of film properties. Finally, these energy transfer experiments provide information on the location of the melamine-formaldehyde resin in the dry film before the onset of crosslinking. This system can serve as a model for waterborne basecoat development in many automotive applications. Note de contenu : - EXPERIMENTAL : Materials - Latex characterization - Film formation, annealing, and fluorescence measurements
- FLUORESCENCE DATA AND DATA ANALYSIS
- RESULTS AND DISCUSSION : Latex preparation and characterization - Where is the melamine located ? - Crosslinking, gel content, and swell ratio - Polymer interdiffusion - Core-Shell latex filmsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17853
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 71, N° 892 (05/1999) . - p. 47-60[article]Réservation
Réserver ce document
Exemplaires (2)
Code-barres Cote Support Localisation Section Disponibilité 003560 - Périodique Bibliothèque principale Documentaires Disponible 009606 - Périodique Bibliothèque principale Documentaires Exclu du prêt
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
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 74, N° 933 (10/2002) . - p. 135-141[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 001244 - Périodique Bibliothèque principale Documentaires Disponible 
Titre : Surface and interface characterization of chlorinated polyolefin coated thermoplastic polyolefin Type de document : texte imprimé Auteurs : Yuechun Ma, Auteur ; Mitchell A. Winnik, Auteur ; Phillip V. Yaneff, Auteur ; Rose Ann Ryntz, Auteur Année de publication : 2005 Article en page(s) : p. 407-416 Note générale : Bibliogr. Langues : Américain (ame) Tags : Polyoléfines Caractérisation 'Interface polymère' Polymère 'Etude expérimentale' 'Spectrométrie fluorescence' 'Méthode analyse' 'Structure interface' surface' 'Effet solvant' 'Relation mise en oeuvre structure' 'Polymère chloré' 'Oléfine dérivé halogéné 'Couche primaire' 'Traitement Prétraitement 'Matériau revêtu' 'Caoutchouc éthylène propène' 'Mélange Polypropène thermoplastique' Index. décimale : 667.9 Revêtements et enduits Résumé : Laser scanning confocal fluorescence microscopy measurements were performed on thermoplastic polyolefin (TPO) substrates that were coated with chlorinated polyolefin (CPO). The TPO investigated was a blend of high modulus polypropylene with an ethylene-butene copolymer (EBR9) containing 9 wt% butene. The CPO was a maleated chlorinated polypropylene containing 20 wt% Cl. The purpose of these experiments was to obtain detailed mechanistic information about the CPO-TPO interaction. To achieve acceptable contrast in these measurements, a fluorescent dye was covalently attached to a small portion of the CPO. Solvent wiping of the TPO substrates with isopropyl alcohol followed by xylenes prior to coating with CPO increased the mean roughness of the TPO surface by more than 100 nm; but it had a much larger effect on the roughness of the (several micrometers) CPO-TPO interface after coating. The EBR component of the TPO was shown to be exclusively responsible for the roughness increase. We also found evidence of a diffuse interface between the CPO and ERB components that was localized to sites in which the EBR was present at the TPO surface. DOI : 10.1007/s11998-005-0008-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-005-0008-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3730
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 2, N° 5 (01/2005) . - p. 407-416[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 000589 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Understanding the effect of processing conditions on the scratch and mechanical behavior of automotive plastic coatings on TPO Type de document : texte imprimé Auteurs : Dottie Britz, Auteur ; Rose Ann Ryntz, Auteur ; Vincent Jardret, Auteur ; Phillip V. Yaneff, Auteur Année de publication : 2006 Article en page(s) : p. 40-46 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 667.9 Revêtements et enduits Résumé : Scratching of plastic components has been a growing concern among automakers. Scratching may result from pre-delivery or post-delivery events. The coatings chemist may formulate differently for "green" properties, such as those related to pre-delivery, than for those properties resulting from aged, weathered coatings. Unfortunately, manufacturers’ warranties cannot separate out which event is the more prevalent contributor to damage of coatings on plastics. While automotive coating producers measure such properties as tensile strength, modulus, and hardness in attempts to relate these mechanical properties back to the "green" scratch resistance, little has been done to show how mechanical properties change as a function of weathering.
This article attempts to correlate the scratch resistance behavior of different one-component (1K) crosslinked systems to the mechanical properties developed as a function of processing conditions and weathering. Of the parameters studied, cure temperature was found to be more critical than time at temperature, thus negating the concept of bake equivalents for coatings on plastics. In addition, it was found that for some 1K cured coatings, scratch resistance did not change significantly with the processing conditions used, while mechanical properties did, especially after accelerated weathering.En ligne : https://drive.google.com/file/d/1-GeIisRWMjVWJBaVfr1KVKmJ2DdLAo0n/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5485
in COATINGS TECH > Vol. 3, N° 6 (06/2006) . - p. 40-46[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 005064 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Use of reactable light stabilizers to prevent migration and to improve durability of coatings On plastic substrates Type de document : texte imprimé Auteurs : Nancy Cliff, Auteur ; Karlis Adamsons, Auteur ; Phillip V. Yaneff, Auteur ; Cindy Peters, Auteur ; Mouhcine Kanouni, Auteur Année de publication : 2005 Article en page(s) : p. 371-387 Note générale : Bibliogr. Langues : Américain (ame) Tags : Etude expérimentale Durabilité Dégradation photochimique Vieillissement accéléré Pipéridine dérivé Triazine Absorbant UV Stabilisant Additif Relation formulation propriété Peinturage Procédé revêtement Matériau revêtu Elastomère Mélange polymère Oléfine Caoutchouc thermoplastique Index. décimale : 667.9 Revêtements et enduits Résumé : One of the challenges of coating plastic substrates for exterior automotive applications involves the tendency for light stabilizers, which inhibit UV degradation of the coating, to migrate out of the topcoat and into the underlying plastic substrate. The consequent depletion of the stabilizer from the topcoat could account for significantly poorer durability for coatings applied on plastic than on a nonpermeable substrate such as steel. These studies investigate the migration of both nonreactable and reactable UV absorbers (UVAs) and hindered amine light stabilizers (HALS) in fully formulated 2K urethane coatings applied on thermoplastic olefin (TPO) and steel substrates. Extensive migration of the nonreactable stabilizers occurs during accelerated exposure of the cured coating, and this migration correlates with poorer performance on TPO. Functionalization of the stabilizer with a group which covalently reacts into the coating will prevent much of this migration, and the improved degree of retention of the reactable light stabilizers in the topcoat correlates with improved performance on TPO substrates. In addition, stabilizer variables, such as the type and extent of functionalization as well as their chemical structure, have an effect on both the migration and performance of the stabilizers. DOI : 10.1007/s11998-005-0005-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-005-0005-y.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3727
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 2, N° 5 (01/2005) . - p. 371-387[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 000589 - Périodique Bibliothèque principale Documentaires Disponible
