Dépouillements

An improved laboratory reattachment method for the rapid assessment of adult barnacle adhesion strength to fouling-release marine coatings / Shane J. Stafslien in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 6 (11/2012)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 9, N° 6 (11/2012) . - p. 651-665 Titre : An improved laboratory reattachment method for the rapid assessment of adult barnacle adhesion strength to fouling-release marine coatings Type de document : texte imprimé Auteurs : Shane J. Stafslien, Auteur ; Justin W. Daniels, Auteur ; James A. Bahr, Auteur ; Bret J. Chisholm, Auteur ; Abdullah Ekin, Auteur ; Dean C. Webster, Auteur ; Beatriz Orihuela, Auteur ; Daniel Rittschof, Auteur Année de publication : 2012 Article en page(s) : p. 651-665 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion Crustacés Marines (peinture) Revêtements antisalissures:Peinture antisalissures Test d'immersion Index. décimale : 667.9 Revêtements et enduits Résumé : Modifications have been made to the previously described adult barnacle laboratory reattachment method to enhance and improve the overall utility of this technique for rapidly assessing the efficacy of novel fouling-release marine coating technologies. These modifications include the use of an immobilization template to secure barnacles onto the coating surfaces during the underwater reattachment process, the development of a semi-automated push-off device to enable consistent and reproducible force gauge measurements and the implementation of a software tool to measure the diameter of barnacle base plates for adhesion strength calculations. A series of experimental siloxane–polyurethane and control coatings were evaluated with both the original and improved laboratory reattachment methodologies. Significantly higher adhesion strengths were obtained on these coatings using the improved reattachment method. Furthermore, only the improved reattachment method was able to discern significant differences in the performance of the siloxane–polyurethane coatings based on differences in compositional components. In this regard, the siloxane–polyurethane coatings containing the poly-caprolactone end groups attached to the poly(dimethylsiloxane) (PDMS) backbone exhibited significantly higher reattached barnacle adhesion strengths than the aminopropyl-terminated PDMS containing coatings. It was also shown that the utilization of barnacles with 5–6 mm base plate diameters, rather than 7–8 mm diameters, significantly enhanced the strength or tenacity of adhesion to the surface of the control coatings. The results of the improved laboratory reattachment evaluation of experimental siloxane–polyurethane and control coatings were in good agreement with barnacle adhesion measurements obtained for the same coatings with static ocean immersion testing in the field. Note de contenu : - EXPERIMENTAL : Coating preparation - Rearing and maintenance of adult barnacles - Reattachment procedure - Measurement of barnacle adhesion in shear - Static ocean immersion testing - Statistical analysis - RESULTS :Original vs improved laboratory reattachment method - Effect of barnacle basal diameter - Static ocean immersion testing DOI : 10.1007/s11998-012-9409-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9409-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16648 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
14359	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Preparation and characterization of novel waterborne antifouling coating / Yuan-Yuan Qu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 6 (11/2012)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 9, N° 6 (11/2012) . - p. 667-674 Titre : Preparation and characterization of novel waterborne antifouling coating Type de document : texte imprimé Auteurs : Yuan-Yuan Qu, Auteur ; Shu-Fen Zhang, Auteur Année de publication : 2012 Article en page(s) : p. 667-674 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Copolymères en émulsion Emulsifiants Polyacrylates Polymérisation en émulsion Revêtements antisalissures:Peinture antisalissures Revêtements en phase aqueuse:Peinture en phase aqueuse Silicones Les silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki). Index. décimale : 667.9 Revêtements et enduits Résumé : In this article, a waterborne antifouling coating was prepared using novel synthesized silicone-acrylate emulsion and 2,3-epoxy-2-methyl-1,4-naphthoquinone. The silicone-acrylate emulsion was synthesized using polymerizable co-emulsifiers (4-propyl-1-(1-propenyl) sulfosuccinate (M-10S) and allyl octylphenyl polyoxyethylene glycol ether (AE-200)), and characterized by Fourier transform infrared spectroscopy, differential scanning calorimetry, and transmission electron microscopy micrograph. The particles in the emulsion are all spherical with an average particle size of 66.5 nm. The adhesion of the coating film reaches 1 grade and its impact resistance is over 50 cm kg. The antifouling activity of the coating film is excellent when the concentration of ME is 6.77 wt%. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of silicone-acrylate emulsion - Formulation of the novel waterborne antifouling coating - Analytic techniques of silicone-acrylate emulsion - Analytical techniques of the antifouling coating - RESULTS AND DISCUSSION : Structural characterization of the silicone-acrylate emulsion - Size and morphology - Film properties of the waterborne antifouling coating - Control of the antifouling efficiency of the coating film - Performance of coating films in seawater DOI : 10.1007/s11998-012-9406-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9406-x.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16649 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
14359	-	Périodique	Bibliothèque principale	Documentaires	Disponible

The effects of basecoat bell application parameters on elements of appearance for an automotive coatings process / Jennifer di Domenico in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 6 (11/2012)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 9, N° 6 (11/2012) . - p. 675-686 Titre : The effects of basecoat bell application parameters on elements of appearance for an automotive coatings process Type de document : texte imprimé Auteurs : Jennifer di Domenico, Auteur ; Paul Henshaw, Auteur Année de publication : 2012 Article en page(s) : p. 675-686 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse des données Automobiles -- Revêtements:Automobiles -- Peinture Plan d'expérience Primaire (revêtement) Système de pulvérisation (technologie) Index. décimale : 667.9 Revêtements et enduits Résumé : This research investigated the effects of basecoat (BC) bell application parameters on the appearance of automotive vehicles. A full factorial two-level DOE matrix was created to test the impact of four BC bell zone variables on appearance: flow rate, shaping air, voltage, and bell speed. Paint age was a covariate in the analysis. Panels were sprayed with waterborne BC followed by solventborne clearcoat and cured vertically at 144°C. The appearance was characterized by measuring the DOI, surface waviness, and multiangle color. Flow rate, bell speed, and shaping air were found to have the most impact on surface waviness. In addition, four interactive effects were also found to be significant. Three of these interactive effects included flow rate in combination with the other parameters. The results of this study indicate that particle size and fluid atomization play a key role in paint appearance. Decreasing the flow rate and/or increasing bell speed lead to a smoother finish, but are also correlated to a darker appearance at near specular angles, whereas the opposite is true at far specular angles. Note de contenu : - LITERATURE REVIEW : Development of appearance comparison techniques - Process parameters - ANALYSIS OF DATA, RESULTS AND DISCUSSION : Panel information results - Wave-scan DOI data analysis - Flop and brightness data analysis DOI : 10.1007/s11998-012-9414-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9414-x.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16650 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
14359	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Nanocomposite acrylic paint with self-cleaning action / Catarina Carneiro in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 6 (11/2012)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 9, N° 6 (11/2012) . - p. 687-693 Titre : Nanocomposite acrylic paint with self-cleaning action Type de document : texte imprimé Auteurs : Catarina Carneiro, Auteur ; Ricardo Vieira, Auteur ; Adélio Mendes, Auteur ; Fernào D. Magalhàes, Auteur Année de publication : 2012 Article en page(s) : p. 687-693 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Dispersions et suspensions Formulation (Génie chimique) Matériaux hybrides Polyacryliques Revêtement auto-nettoyant:Peinture auto-nettoyante Revêtements organiques Revêtements:Peinture Index. décimale : 667.9 Revêtements et enduits Résumé : A nanodispersion of surface-functionalized fumed silica was incorporated into an acrylic paint formulation. SEM imaging indicated good dispersion of silica within the polymer matrix. This hybrid coating showed significantly lower dirt pick-up than the equivalent paint formulation without nanosilica additive, towards both organic and inorganic ashes. Washing with running water further decreases dirt retention. This self-cleaning performance remained unchanged after several dirt/washing cycles, during a 1-month period. Surface hardness measurements indicated no significant differences between the original and composite paint films. The lower dirt pick-up was attributed to nanoroughness created by the nanosilica particles present in the film. Note de contenu : - EXPERIMENTAL : Materials - Preparation of nanocomposite paint - Characterization methods - RESULTS AND DISCUSSION : Nanosilica dispersion in the dry film - Dirt pick-up behavior - Hardenss - Water contact angle DOI : 10.1007/s11998-012-9407-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9407-9.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16654 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
14359	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Catalytic synthesis of hematite-mica pearlescent pigments using a low-temperature method / Lihong Han in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 6 (11/2012)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 9, N° 6 (11/2012) . - p. 695-702 Titre : Catalytic synthesis of hematite-mica pearlescent pigments using a low-temperature method Type de document : texte imprimé Auteurs : Lihong Han, Auteur ; Yanchang Chen, Auteur ; Modan You, Auteur ; Yu Wei, Auteur Année de publication : 2012 Article en page(s) : p. 695-702 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Catalyse Hématite Mica Pigments Pigments -- Synthèse Pigments nacrés Index. décimale : 667.9 Revêtements et enduits Résumé : A novel low-temperature method is described for the direct synthesis of Fe2O3/mica pearlescent pigments with ferric chloride as a precursor and trace Fe(II) as a catalyst which does not require any calcination step. The as-synthesized pigments are characterized in detail by means of different techniques including X-ray diffraction, field emission scanning electron microscopy, energy dispersive spectroscopy, and colorimetry. The influence of various factors on the transformation from Fe(OH)3 coating layer to crystalline hematite coating layer is investigated, respectively. Furthermore, this paper studies several critical technological parameters pertaining to the influences on morphology and color properties of the pigments such as the coating temperature and the pH value. Note de contenu : - The catalysis of Fe(II) on the transformation of Fe(OH)3 coated on mica - The effect of the coating temperature - The effect of the initial pH value DOI : 10.1007/s11998-012-9419-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9419-5.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16655 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
14359	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Preparation of hyperbranched polyester polyol-based urethane acrylates and applications on UV-curable wood coatings / Sümeyye Sabani in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 6 (11/2012)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 9, N° 6 (11/2012) . - p. 703-716 Titre : Preparation of hyperbranched polyester polyol-based urethane acrylates and applications on UV-curable wood coatings Type de document : texte imprimé Auteurs : Sümeyye Sabani, Auteur ; Aysen H. Önen, Auteur ; Atilla Güngör, Auteur Année de publication : 2012 Article en page(s) : p. 703-716 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bois -- Revêtements Polyesters Polymères ramifiés Polyols Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques Revêtements -- Séchage sous rayonnement ultraviolet Index. décimale : 667.9 Revêtements et enduits Résumé : In the present study, hyperbranched urethane acrylates (UA/HB-PEs) were synthesized by modifying the hydroxyl groups of hyperbranched polyester polyols (HB-PEs). The structure of oligomers were characterized by FTIR and 1H NMR spectroscopic techniques. Formulations containing UA/HB-PEs, reactive diluents, and photoinitiator were applied onto wood substrates and successfully polymerized under UV-irradiation. The coating performances and thermal properties of UV-cured films were evaluated. The studies on film characteristics reveal that the incorporation of UA/HB-PE afforded coatings with good adhesion and high gloss properties. It is observed that UV-cured coatings originated from [2,2-bis(4-?-hydroxyethoxy) phenyl propane] (HB-HEPA)- and [2,2-bis(4-?-hydroxyethoxy) phenyl 6F propane] (HB-HEPFA)-based oligomers possessed better surface and mechanical properties. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of [2,2-bis(4-?-hydroxyethoxy) phenyl propane] (HEPA and [2,2-bis(4-?-hydroxyethoxy) phenyl 6F propane] (HEFPA) - Synthesis of 1,4-cyclohexanedimethanol-based polyester polyol (PECHDM) - General procedure for the synthesis of HEPA-,HEPFA-, and CHDM-based hyperbranched polyester polyols - General procedure for the synthesis of hyperbranched urethane acrylates - Coating formulation and film preparation - Characterization - RESULTS AND DISCUSSION : Synthesis and characterization of hyperbranched polyesters polyols - Synthesis and characterization of hyperbranched urethane acrylates - Coating performances - Characterization of the free films DOI : 10.1007/s11998-012-9418-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9418-6.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16656 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
14359	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Cure and morphology of epoxy/polyester powder coatings containing titanium dioxide : a thermally stimulated discharge study / Emile C. Trottier in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 6 (11/2012)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 9, N° 6 (11/2012) . - p. 717-724 Titre : Cure and morphology of epoxy/polyester powder coatings containing titanium dioxide : a thermally stimulated discharge study Type de document : texte imprimé Auteurs : Emile C. Trottier, Auteur ; Stanley Affrossman, Auteur ; Richard A. Pethrick, Auteur Année de publication : 2012 Article en page(s) : p. 717-724 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Dioxyde de titane Epoxydes Mesures diélectriques Polyesters Réticulation (polymérisation) Revêtements poudre:Peinture poudre Stimulation électrique Index. décimale : 667.9 Revêtements et enduits Résumé : This article describes the use of thermally stimulated electrical discharge (TSD) measurements in the study of the cure processes occurring for a range of titanium dioxide, silica, and zinc oxide-pigmented epoxy polyester films. The unfilled polyester–epoxy resin system exhibits a simple TSD profile indicative of a combination of space charge and dipole relaxation processes. The addition of the Modaflow, which is used to aid in the dispersion of the pigment in the system, induces phase separation under certain cure conditions. In a number of systems, two lower temperature Tg peaks were initially observed, which collapsed into a single peak on post cure. The principal difference between the two grades of titanium dioxide was the size of the space charge peak, which is a direct indication of the mobile ion content in the material. The sulfate has higher mobile ion content than the chloride route material. Differences were observed between traces of silica and zinc oxide, which reflect the ability of the particles to interact with the resin and form a dense matrix. Silica at low concentrations is able to reduce the space charge peak which implies it can trap ions. The TSD study indicates that the pigments are able to change the morphology of the matrix which is being formed. Note de contenu : - EXPERIMENTAL : Resins - Pigments - Thermally stimulated discharge measurements - RESULTS AND DISCUSSION : Studies of the base resin system cured at 413K - Studies of the base resin system with Modaflow cured at various temperatures - Titanium dioxide pigments A and B - Silica and zinc oxide effects - ACTIVATION ENERGY CALCULATIONS DOI : 10.1007/s11998-012-9410-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9410-1.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16657 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
14359	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Rheological studies of the cure of epoxy/powder coatings containing titanium dioxide / Emile C. Trottier in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 6 (11/2012)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 9, N° 6 (11/2012) . - p. 725-733 Titre : Rheological studies of the cure of epoxy/powder coatings containing titanium dioxide Type de document : texte imprimé Auteurs : Emile C. Trottier, Auteur ; Stanley Affrossman, Auteur ; Richard A. Pethrick, Auteur Année de publication : 2012 Article en page(s) : p. 725-733 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Dioxyde de titane Epoxydes Oxyde de zinc Polyesters Réticulation (polymérisation) Revêtements poudre:Peinture poudre Rhéologie Rhéomètres Silice La silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux. La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...). Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale. Index. décimale : 667.9 Revêtements et enduits Résumé : The cure characteristics of a series of powder coatings containing titanium dioxide dispersed in an epoxy/polyester matrix are reported. The titanium dioxide pigments were produced via both the chloride and sulfate routes and coated with varying amounts of alumina and silica. Comparison data for formulations containing zinc oxide and silica are also included. The time to gelation for these powder coatings depends on a number of factors. Increasing the level of flow agent significantly reduces the time to gelation. The presence of traces of zinc inhibits cure in the case of the sulfate-based pigments. Varying levels of alumina and silica in the coating on the titanium dioxide coating also influence the time to gelation. Increasing the level of silica on the chloride-based coating increases the time to gelation, whereas in the case of the sulfate based coating the time to gelation is shortened. These differences are attributed to the effects of zinc in the coating and the effectiveness of the dicyandiamide catalysts. Note de contenu : - MATERIALS : Titanium dioxide pigments - Surface area - Surface acidity - Other pigments - Resins - Formulation of powder coating - RHEOLOGICAL MEASUREMENTS : Effect of Modaflow on the cure process - Effect of TiO2 grade on the cure process - Effect of zinc oxide on the cure behavior - Effects of silica on the cure behavior - Effect of TiO2 loading on cure behavior DOI : 10.1007/s11998-012-9417-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9417-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16658 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
14359	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Nuclear magnetic resonance profiling of chemical warfare agent simulant mass-transport through a multilayered polymeric coating / Ehsan Gazi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 6 (11/2012)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 9, N° 6 (11/2012) . - p. 735-743 Titre : Nuclear magnetic resonance profiling of chemical warfare agent simulant mass-transport through a multilayered polymeric coating Type de document : texte imprimé Auteurs : Ehsan Gazi, Auteur ; Steven J. Mitchell, Auteur Année de publication : 2012 Article en page(s) : p. 735-743 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agents d'expansion (chimie) Désorption Matériel militaire -- Revêtements protecteurs Polyuréthanes Résistance chimique Résonance magnétique nucléaire Revêtements multicouches Index. décimale : 667.9 Revêtements et enduits Résumé : Temporary peelable coatings (TPCs) protect military equipment surfaces against chemical warfare agents (CWAs) by absorbing liquid contamination, thereby reducing the contact and vapor hazards to personnel. An understanding of the liquid CWA mass-transport mechanisms governing sorption is critical toward optimizing coating properties for reducing these hazards. We applied Nuclear Magnetic Resonance profiling to resolve mass-transport mechanisms of the CWA bis(2-chloroethyl) sulfide (sulfur mustard) simulant, methyl salicylate (MS), through a two-layered polyurethane TPC, where each layer absorbs liquids using different mechanisms (passive diffusion through pores and solubilization with the liquid). Depth profiles obtained at increasing time-points post-contamination demonstrated (a) dynamics of MS volume spread through the coating, (b) polymer swelling by a significant increase in the thickness of one of the layers and its relationship with overall coating thickness and contamination mass, and (c) preferential sites within the bulk for MS localization. Information of the type obtained from this exemplar system can be correlated to the physiochemical properties of the liquid contaminant as well as contact hazard and vapor hazard measurements to facilitate next generation coating development. Moreover, time-resolved determination of multiple liquid mass-transport mechanisms in an optically opaque multilayered coating were demonstrated noninvasively. Note de contenu : - EXPERIMENTAL : TPC contamination - NMR-MOUSE measurements - Data processing - RESULTS AND DISCUSSION : Drop spread volume determination from 1D depth profiles - Depth profiles of uncontaminated TPCs - Depth profiling of coating A after contamination with MS - Depth profiling of multilayered coating B after contamination with MS - The effect of multilayered coating B thickness on MS bulk distribution DOI : 10.1007/s11998-012-9416-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9416-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16659 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
14359	-	Périodique	Bibliothèque principale	Documentaires	Disponible

A modern analytical toolbox : defect (W&D) studies of automotive coating systems, including depth profiling studies / Karlis Adamsons in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 6 (11/2012)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 9, N° 6 (11/2012) . - p. 745-756 Titre : A modern analytical toolbox : defect (W&D) studies of automotive coating systems, including depth profiling studies Type de document : texte imprimé Auteurs : Karlis Adamsons, Auteur Année de publication : 2012 Article en page(s) : p. 745-756 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Automotile -- Peinture -- Détérioration Durée de vie (Ingénierie) Revêtements -- Analyse Revêtements -- Défauts:Peinture -- Défauts Index. décimale : 667.9 Revêtements et enduits Résumé : Chemical and microscopy measurement technologies have proven to be very powerful in our failure analysis efforts to detail composition and morphology changes of multilayered automotive coating systems obtained from the field. Weathering and durability (W&D) analyses used include those following chemical composition and property changes, at surface/near-surface and interface/interphase loci, as well as depth profiling through one or more system layers. Microscopy tools include a variety of techniques to study surfaces and normal cross sections. Both macro- and micro-morphology details can be effectively imaged to help investigators correlate coating system appearance changes with the mechanisms, and associated kinetics, of degradation. This article will offer an overview of commonly used analyses for developing new coating systems and for tracking appearance, chemical, physical, and mechanical changes due to common mechanisms causing coating systems to fail during service in the field. Note de contenu : - EXPERIMENTAL : Monitoring chemical composition - Imaging loci of interest - Coating system and component samples - RESULTS AND DISCUSSION : Monitoring chemical composition - Imaging loci of interest - Color changes - The analytical toolbox DOI : 10.1007/s11998-012-9412-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9412-z.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16660 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
14359	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Use of fluoropolymer permanent release coatings for molded polyurethane foam production / Leandro Figueiredo in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 6 (11/2012)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 9, N° 6 (11/2012) . - p. 757-764 Titre : Use of fluoropolymer permanent release coatings for molded polyurethane foam production Type de document : texte imprimé Auteurs : Leandro Figueiredo, Auteur ; Pedro Bandeira, Auteur ; Adélio Mendes, Auteur ; Margarida M. S. M. Bastos, Auteur ; Fernào D. Magalhàes, Auteur Année de publication : 2012 Article en page(s) : p. 757-764 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Démoulage Fluoropolymères Isocyanates Mousses plastiques Polytétrafluoréthylène Polyuréthanes Revêtements Index. décimale : 667.9 Revêtements et enduits Résumé : The problem of adhesion of polyurethane foams to fluoropolymer permanent release mold coatings was studied. Two coatings, based on polytetrafluoroethylene (PTFE) and perfluoroalkoxy polymer (PFA) aqueous dispersions, respectively, were applied on aluminum plates, and the foam release performance evaluated. The PTFE coating displayed gradual loss of antiadhesion properties with consecutive exposure to the reactive mixture, which was associated with isocyanate surface penetration. Penetrant mass uptake experiments, performed on free films, indicated that PTFE retains about 10 times more isocyanate than PFA, probably because of its porous surface morphology. A synergistic effect was found by applying a very small quantity of a waterborne release agent on the PTFE coating, before every foam molding cycle. The release agent formed a protective barrier that minimized contact of the coating with the reactive mixture, allowing for stable and robust foam release performance. The problem of polyurea build-up, associated with the use of aqueous release agents, was not observed because of the small amounts of compound used. Note de contenu : - EXPERIMENTAL : Materials - Polyurethand foam formulation and molding - Evaluation - Evaluation of the release force and release force and release work - FTIR spectrocopy - Scanning electron microscopy - Penetrant mass uptake measurements - RESULTS AND DISCUSSION : Surface morphology - Penetrant mass uptake - Foam release performance of PTFE and PFA coatings - Performance of PTFE coating combined with release agent DOI : 10.1007/s11998-012-9413-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9413-y.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16661 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
14359	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Characterization and properties of gradient polyacrylate latex particles by gradient emulsion polymerization / Xinya Zhang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 6 (11/2012)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 9, N° 6 (11/2012) . - p. 765-774 Titre : Characterization and properties of gradient polyacrylate latex particles by gradient emulsion polymerization Type de document : texte imprimé Auteurs : Xinya Zhang, Auteur ; Xia Wei, Auteur ; Wenxing Yang, Auteur ; Yongjin Li, Auteur ; Huanqin Chen, Auteur Année de publication : 2012 Article en page(s) : p. 765-774 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acrylate de butyle Analyse thermique Caractérisation Chromatographie sur gel Copolymérisation Latex Méthacrylate de méthyle Microscopie à force atomique Microscopie électronique en transmission Particules (matières) Polyacrylates Polymérisation en émulsion Résonance magnétique nucléaire Index. décimale : 667.9 Revêtements et enduits Résumé : In this study, gradient acrylate latex particles were synthesized by gradient copolymerization. n-Butyl acrylate (BA) and methyl methacrylate (MMA) were used as co-monomers, dodecyl diphenyl ether sodium disulfonate as the emulsifier, and potassium persulfate as the initiator. The technique involved the continuous addition of one monomer mixture into a stirred tank containing another monomer mixture. Their microstructure and properties were analyzed by nuclear magnetic resonance (NMR), gel permeation chromatography (GPC), differential scanning calorimetry (DSC), atomic force microscopy (AFM), transmission electron microscopy (TEM), and particle size analysis. 1H-NMR spectra show a gradual change in the chemical composition with the growth of molecular chains. The gradient polymer latexes, the instantaneous copolymer composition of which varies as the polymerization proceeds, are obtained. GPC analyses show that the aggregated molecular chain in the BA-centered latex particle experiences a process from dominant BA to MMA with changes in the monomer's feed composition during the polymerization. Particle size and TEM analyses show that the increasing latex size agrees well with the gradient growth pattern. DSC analyses show that the gradient latex particles exhibit only one broadened and ambiguous glass transition region. AFM analyses indicate no obvious microphase segregation occurs in the gradient latex particles, further verifying that the gradient microstructure is obtained. Note de contenu : - EXPERIMENTAL DETAILS : Materials - Gradient emulsion polymerization - Testing and characterization - RESULTS AND DISCUSSION : H-NMR analyses - GPC analyses - Particle size analyses - DSC and MFT analyses - AFM analyses DOI : 10.1007/s11998-012-9422-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9422-x.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16662 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
14359	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Effect of pH and current density on the electrodeposition of Zn-Ni-Fe alloys from a sulfate bath / Mortaga M. Abou-Krisha in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 6 (11/2012)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 9, N° 6 (11/2012) . - p. 775-783 Titre : Effect of pH and current density on the electrodeposition of Zn-Ni-Fe alloys from a sulfate bath Type de document : texte imprimé Auteurs : Mortaga M. Abou-Krisha, Auteur Année de publication : 2012 Article en page(s) : p. 775-783 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alliages Anticorrosion Dépôt électrolytique Fer Morphologie (matériaux) Nickel Le nickel est un élément chimique, de symbole Ni et de numéro atomique 28. Le nickel est un métal blanc argenté qui possède un éclat poli. Il fait partie du groupe du fer. C'est un métal ductile (malléable). On le trouve sous forme combinée au soufre dans la millérite, à l'arsenic dans la nickéline. Grâce à sa résistance à l'oxydation et à la corrosion, il est utilisé dans les pièces de monnaie, pour le plaquage du fer, du cuivre, du laiton, dans certaines combinaisons chimiques et dans certains alliages. Il est ferromagnétique, et est fréquemment accompagné de cobalt. Il est particulièrement apprécié pour les alliages qu'il forme. Revêtement métallique Revêtements -- Défauts Surfaces (Physique) Zinc Index. décimale : 667.9 Revêtements et enduits Résumé : An investigation was done on the influences of current density and pH on the electrodeposition behavior of Zn–Ni–Fe alloys using a sulfate bath. The bath consisted of 0.1 M ZnSO4, 0.1 M NiSO4, 0.1 M FeSO4, 0.2 M Na2SO4, 0.2 M H3BO3, and 0.01 M H2SO4. The results of Zn–Ni–Fe alloys’ codeposition revealed that the significant inhibition of Ni and Fe deposition takes place because of the presence of Zn2+ in the plating bath. A transition current density was noticed above wherein a transition from normal to anomalous deposition took place. Bright and uniform surface appearance deposits of Zn–Ni–Fe were the results obtained at pH range 2–5, and the deposits showed high corrosion resistance. During the investigation, the usage of cyclic voltammetry and galvanostatic techniques for electrodeposition were utilized, while linear polarization resistance and anodic linear sweeping voltammetry techniques were used for the corrosion study. Characterization of morphology and the chemical composition of the deposits were performed by means of scanning electron microscopy and atomic absorption spectroscopy. Note de contenu : - Effect of sulfuric acid concentration - Effect of current density on Zn-Ni-Fe alloy deposition DOI : 10.1007/s11998-012-9402-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9402-1.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16663 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
14359	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Electrodeposited nickel-phosphorus (Ni-P) alloy coating : an in-depth study of its preparation, properties and structural transitions / Anju M. Pillai in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 6 (11/2012)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 9, N° 6 (11/2012) . - p. 785-797 Titre : Electrodeposited nickel-phosphorus (Ni-P) alloy coating : an in-depth study of its preparation, properties and structural transitions Type de document : texte imprimé Auteurs : Anju M. Pillai, Auteur ; A. Rajendra, Auteur ; A. K. Sharma, Auteur Année de publication : 2012 Article en page(s) : p. 785-797 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alliages nickel-phosphore Dépôt électrolytique Microstructures Nanoindentation Revêtement métallique Traitement thermique Index. décimale : 667.9 Revêtements et enduits Résumé : Ni-P deposits with a phosphorus content of up to 20% (wt) were obtained on AA6061 substrates by direct current electrodeposition technique from a solution containing nickel sulfate, nickel chloride, phosphorous acid, phosphoric acid, and a wetting ageng (sodium lauryl sulfate). The effect of various plating parameters like current density, concentration of phosphorous acid, concentration of phosphoric acid and plating temperature on the P content of the coating as well as the rate of deposition was investigated systematically. It has been observed that the influence of current density on the P content of the deposit is largely dependent on the concentration of phosphorous acid in the plating bath. Composition, surface morphology, microstructure, and mechanical properties of the Ni-P deposits were studied using SEM, EDAX, XRD, and nanoindentation techniques. Ni-P electrodeposits with low P ocntent in the range of 4è7 wt% of P exhibited superior microhardness of 7.74-8.57 GPa. With increasing P content in the deposit, the structure undergoes transition from crystalline to nanocrystalline and becomes amorphous above 9.14 wt% of P. Ni-P alloys with some selected compositions were subjected to heat treatment at 400°C for 1h in a hot air oven and the resulting variation in mechanical properties was studied using nanoindentation technique. Note de contenu : - Appearance - Effect of plating parameters - Effect of P content on the surface morphology of the coating - Effect of P content on the microstructure of the coating - Influence of plating parameters on the mechanical properties of the deposit - Effect of heat treatment on the microstructure of the coating - Effect of heat treatment on mechanical properties DOI : 10.1007/s11998-012-9411-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9411-0.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16664 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
14359	-	Périodique	Bibliothèque principale	Documentaires	Disponible