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20 résultat(s) recherche sur le tag 'Spectrométrie'




Contribution de la spectrométrie de masse au développement de la chimie combinatoire / Pierre-Hervé Lambert in L'ACTUALITE CHIMIQUE, N° 9 (09/2000)
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Titre : Contribution de la spectrométrie de masse au développement de la chimie combinatoire Type de document : texte imprimé Auteurs : Pierre-Hervé Lambert, Auteur ; Jean-Paul Volland, Auteur ; Sophie Bertin, Auteur Année de publication : 2000 Article en page(s) : p. 25-28 Note générale : Bibliogr. Langues : Français (fre) Tags : Spectrométrie masse Chimie combinatoire Librairies Collections Haut débit Index. décimale : 540 Chimie et sciences connexes Résumé : Dans le domaine de la recherche de composés biologiquement actifs, le développement de techniques de criblage haut débit, de la chimie combinatoire et de la synthèse parallèle ont entraîné le besoin de méthodes analytiques efficaces, capables de traiter des mélanges complexes ou un grand nombre de composés.
Nous discuterons dans cet article de diverses techniques de spectrométrie de masse permettant l'analyse de librairies ou de collections de composés. Seront également présentées les nouvelles technologies de haut débit, comme les cibles à haute densité de prélèvement MALDI (matrix-assisted laser desorption ionization), le couplage de la chromatographie en phase liquide parallèle et de la spectrométrie de masse, les nouveaux développements de la chromatographie préparative assistée par spectrométrie de masse, ainsi que le codage isotopique et le criblage biologique.En ligne : https://www.lactualitechimique.org/Contribution-de-la-spectrometrie-de-masse-au- [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=7005
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Code-barres Cote Support Localisation Section Disponibilité 002163 - Périodique Bibliothèque principale Documentaires Disponible Acid etch of automotive clearcoats. II. Comparison of degradation chemistry in laboratory and field testing / P. J. Schmitz in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 72, N° 902 (03/2000)
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Titre : Acid etch of automotive clearcoats. II. Comparison of degradation chemistry in laboratory and field testing Type de document : texte imprimé Auteurs : P. J. Schmitz, Auteur ; Joseph W. Holubka, Auteur ; Li - Feng Xu, Auteur Année de publication : 2000 Article en page(s) : p. 53-61 Note générale : Bibliogr. Langues : Américain (ame) Tags : Matériau revêtement Vernis Automobile Dégradation chimique Exposition intempérie Retombée atmosphérique Pluie acide Essai laboratoire en champ Etude comparative expérimentale Spectrométrie photoélectron Rayon X Index. décimale : 667.9 Revêtements et enduits Résumé : A laboratory test procedure was developed to quantitatively evaluate the acid etch resistance of automotive clearcoats, Here we attempt to verify that the conditions used in the laboratory test reproduce the field degradation chemistry to assure that the test is evaluating realistic performance characteristics. In this study we applied X-ray photoelectron spectroscopy (XPS) as a tool to determine if degradation products are observable which can be used to verify the consistency of the field and laboratory degradation processes for acrylic melamine-based clearcoats. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5822
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Code-barres Cote Support Localisation Section Disponibilité 001207 - Périodique Bibliothèque principale Documentaires Disponible Advanced testing procedures for high performance coatings / Flavio Deflorian in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 72, N° 908 (09/2000)
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Titre : Advanced testing procedures for high performance coatings Type de document : texte imprimé Auteurs : Flavio Deflorian, Auteur ; Stefano Rossi, Auteur ; Pier Luigi Bonora, Auteur Année de publication : 2000 Article en page(s) : p. 81-87 Note générale : Bibliogr. Langues : Américain (ame) Tags : Matériau revêtement Peinture anticorrosion Industrie automobile Protection corrosion Essai brouillard salin Impédance électrique Méthode électrochimique Etude comparative expérimentale Spectrométrie impédance Index. décimale : 667.9 Revêtements et enduits Résumé : In the first part of this work, an integrated approach incorporating electrochemical (electrochemical impedance spectroscopy), calorimetric (differential scanning calorimetry), mechanical (dynamic mechanical thermal analysis), and infrared spectroscopy (Fourier transform infrared spectroscopy) techniques was used to characterize some organic coatings from the automotive industry. Comparison of the results obtained with different techniques allows not only a higher precision in the evaluation of natural or artificial degradation, which is very difficult to obtain using traditional techniques, but also better data interpretation and, therefore, the possibility of understanding the different degradation mechanisms. In the second part, some preliminary results concerning the comparison of salt spray exposure and EIS measurements are discussed. The statistical analysis of the results showed that the degradation mechanism in the two cases is completely different and, therefore, the information which is obtained with the two testing approaches is also different. With EIS measurements obtained in immersion, it is possible to monitor, in particular, the barrier properties of the coatings, which are dominated by the presence of defects. In the case of salt spray (without scratch), the main property to be measured is the loss of adhesion which causes blister formation. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5790
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Code-barres Cote Support Localisation Section Disponibilité 001213 - Périodique Bibliothèque principale Documentaires Disponible Chemical depth profiling of automotive coating systems using slab microtome sectioning with IR/UV-VIS spectroscopy and optical microscopy / Karlis Adamsons in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 74, N° 924 (01/2002)
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Titre : Chemical depth profiling of automotive coating systems using slab microtome sectioning with IR/UV-VIS spectroscopy and optical microscopy Type de document : texte imprimé Auteurs : Karlis Adamsons, Auteur Année de publication : 2002 Article en page(s) : p. 47-54 Note générale : Bibliogr. Langues : Américain (ame) Tags : Essai vieillissement Dégradation photochimique Revêtement multicouche Etude expérimentale Microscopie optique Spectrométrie UV visible IR Microtomie Profil profondeur Feuil Analyse chimique Vernis Peinture Matériau revêtement Industrie automobile Index. décimale : 667.9 Revêtements et enduits Résumé : Chemical surface/near-surface analysis and depth profiling of high performance automotive coating systems can be done efficiently by commonly available infrared (IR), ultraviolet-visible (UV-VIS) and optical microscopy (OM) measurement technologies. The different stages of mass loss for acrylic/melamine-crosslinked clearcoats modeled after those used in high performance automotive coating systems were explored as a function of exposure time/conditions. Two approaches were used. Transmission mode IR experiments were conducted to monitor mass loss in isolated clearcoats. OM was used to monitor mass loss in clearcoats that are part of actual multilayered coating systems. UV-screener (UVA) permanence and interphase mixing (i.e., between clearcoat and basecoat layers) as well as general chemistry depth profiling studies of model acrylic/melamine-crosslinked and acrylic/melamine+silane-crosslinked clearcoats were done as a function of system preparation and exposure time/conditions. UVA depth profiles were obtained using slab microtomy sectioning co-planar to the surface, followed by solvent extraction and UV-VIS solution analysis to monitor UVA content as a function of section mass and thickness. General chemistry depth profiles were obtained using slab microtomy sectioning (as mentioned previously), followed by ATR (IR) analysis to monitor changes in the photooxidation index balues and the spectral envelop in the 2600-3800 cm-1 range. The approaches described herein de not require expertise/equipment that is available to only a few, thus increasing the potential utility of such tools. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5680
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Code-barres Cote Support Localisation Section Disponibilité 001233 - Périodique Bibliothèque principale Documentaires Disponible 001232 - Périodique Bibliothèque principale Documentaires Disponible Coating evaluation and validation of accelerated test conditions using an in-situ corrosion sensor / G. D. Davis in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 74, N° 935 (12/2002)
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Titre : Coating evaluation and validation of accelerated test conditions using an in-situ corrosion sensor Type de document : texte imprimé Auteurs : G. D. Davis, Auteur ; L. A. Krebs, Auteur ; C. M. Dacres, Auteur Année de publication : 2002 Article en page(s) : p. 69-74 Note générale : Bibliogr. Langues : Américain (ame) Tags : Spectrométrie impédance Etude expérimentale Impédance électrique Capteur mesure Validation test Essai accéléré corrosion Protection Peinture anticorrosion Matériau revêtement Index. décimale : 667.9 Revêtements et enduits Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5617
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Code-barres Cote Support Localisation Section Disponibilité 001246 - Périodique Bibliothèque principale Documentaires Disponible Controlling method for UV-curing processes / Hans-Peter Seng in EUROPEAN COATINGS JOURNAL (ECJ), N° 11/98 (11/1998)
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PermalinkEvaluating barrier properties of organic coatings by water permeation and electrochemical methods / P. C. Inone in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 75, N° 939 (04/2003)
PermalinkEvaluation of alkane sulfonic acid catalysts and derivatives for curing activity in a melamine/acrylic polyol coating formulation using Fourier transform infrared spectroscopy / Dana Garcia in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 72, N° 908 (09/2000)
PermalinkEvaluation of corrosion protection performance of surface coatings by EIS : The theoretical aspects / Ashish Kumar Mishra in PAINTINDIA, Vol. L, N° 3 (03/2000)
PermalinkEvaluation of steel/primer based on chestnut tannin/paint film systems by EIS / S. Hornus Sack in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 74, N° 926 (03/2002)
PermalinkLong-term weathering behavior of UV-curable clearcoats : Depth profiling of photooxidation, UVA, and HALS distributions / Christopher M. Seubert in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 2, N° 7 (07/2005)
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PermalinkOn the combined use of UVA, HALS, photooxidation, and fracture energy measurements to anticipate the long-term weathering performance of clearcoat/basecoat automotive paint systems / J. L. Gerlock in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 73, N° 918 (07/2001)
PermalinkQuantitative spectroscopy to determine the effects of photodegradation on a model polyester - urethane coating / S. G. Scroll in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 75, N° 945 (10/2003)
PermalinkSpatially resolved degradation in heterophasic / Shulamith Schlick in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 2, N° 5 (01/2005)
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PermalinkThe electrochemical aspects of the influence of different binders on the corrosion protection afforded by zinc-rich paints / M. Selvaraj in SURFACE COATINGS INTERNATIONAL, Vol. 80, N° 1 (01/1997)
PermalinkUnifying model for associative thickener influences on waterborne coatings : II. Competitive adsorption of nonionic surfactants and HEUR thickeners on titanium dioxide pretreated with inorganic stabilizers and organic oligomeric dispersants / Ming-Ren Tarng in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 74, N° 935 (12/2002)
PermalinkUV curing of aqueous polyurethane acrylate dispersions. A comparative study by real-time FTIR spectroscopy and pilot scale curing / Armin Tauber in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 72, N° 911 (12/2000)
PermalinkUV curing of a pressure sensitive adhesive coating studied by real - time ftir spectroscopy and laboratory scale curing experiments / Armin Tauber in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 74, N° 927 (04/2002)
PermalinkUV-visible technique for studying powder coatings and their dissolution / Önder Pekcan in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 73, N° 923 (12/2001)
PermalinkValidation of the reciprocity law for coating photodegradation / Joannie W. Chin in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 2, N° 7 (07/2005)
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