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Ajouter le résultat dans votre panierEffect of itaconic acid on the wet scrub resistance of highly pigmented paints for architectural coatings / Mauricio Pinheiro de Oliveira in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 4 (07/2011)
Titre : Effect of itaconic acid on the wet scrub resistance of highly pigmented paints for architectural coatings Type de document : texte imprimé Auteurs : Mauricio Pinheiro de Oliveira, Auteur ; Caroline Reggiani Silva, Auteur ; Lilia Müller Guerrini, Auteur Année de publication : 2011 Article en page(s) : p. 439-447 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Itaconique, Acide
Latex
Pigments
Polymérisation en émulsion
Résistance aux frottements humides
RevêtementsTags : 'Latex fonctionnalisé' 'Résistance à la friction' 'Acide itaconique' 'Polymérisation en émulsion' 'Peintures hautement pigmentées' Index. décimale : 667.9 Revêtements et enduits Résumé : This study investigates the influence of carboxylic monomers, such as itaconic acid (IA), on the colloidal properties of the latexes made by semi-continuous emulsion copolymerization of styrene (STy) with n-butyl acrylate (BA). A number of copolymerization runs were carried out with different IA concentrations. The effect of functional monomer on the overall conversion, the colloidal properties of the latexes, and the distribution of the carboxylic groups (buried, particle surface and aqueous phase) were examined. The carboxylic groups present in the latexes were analyzed using conductimetric and potentiometric titrations. The behavior of the IA on the wet scrub resistance of highly pigmented paints for architectural coatings was examined and correlated with the distribution of the carboxylic groups. The results obtained showed that the properties of highly pigmented paints are greatly dependent on the amount and distribution of the carboxylic groups. The carboxylic acid distributed in the aqueous phase has a strong influence on the wet scrub resistance and on the characteristics of the final products. Note de contenu : EXPERIMENTAL : Materials - Polymerization - Composition and paint formulation
CHARACTERIZATIONS : Particle size analysis - Viscosity and pH - Coagulum formation - Freeze-thaw stability - Carboxylic group distribution - Web scrub test - Optical property
RESULTS AND DISCUSSION : Overall conversion and particle size - Distribution of carboxyl groups - Scrub resistance of dried paint filmDOI : 10.1007/s11998-010-9317-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-010-9317-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12131
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Code-barres Cote Support Localisation Section Disponibilité 013158 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Exterior wood coatings. Part-1 : performance of semitransparent stains on preservative-treated wood Type de document : texte imprimé Année de publication : 2011 Langues : Américain (ame) Catégories : Bois -- Revêtements protecteurs
Bois extérieursTags : 'Taches semi-transparentes' 'Traitement bois' 'Détérioration naturelle' 'Vérification 'Quat cuivre alkalin' (ACQ) 'Azole cuivre' Index. décimale : 667.9 Revêtements et enduits Résumé : Pressure-treated lumber available for residential applications had been changed from chromated copper arsenate (CCA) treatment to Cu-amine formulations (since January 2004). This change created a need to investigate the performance of coatings on these new Cu-based preservatives as compared with CCA. This study evaluated performance of a number of semitransparent deck stains on CCA, alkaline copper quat (ACQ), copper azole (CA), and untreated wood samples during 3 years of natural weathering. Coatings were evaluated for their ability to reduce water uptake, color change, checking of wood, and mildew growth and to improve general appearance of preservative-treated wood samples. Overall, Cu-amine-treated wood had on average 50% higher water uptake than CCA-treated wood samples. Although solvent-based coatings had better water repellency performance on CCA-treated and untreated wood, there was no significant difference in water-repellent effectiveness (WRE) between water-based and solvent-based coatings on ACQ- or CA-treated wood. All preservative-treated woods had less color change and better visual ratings than those of untreated wood samples. Based on image analysis which was used to determine the total area of surface checking on samples after 3 years, preservative treatments had no significant effect on reducing checking of wood while coatings reduced surface checking by 30-40%. DOI : 10.1007/s11998-011-9332-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9332-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12132
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 4 (07/2011)[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 013158 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Exterior wood coatings. Part-2 : modeling correlation between coating properties and their weathering performance Type de document : texte imprimé Auteurs : Mojgan Nejad, Auteur ; Paul Cooper, Auteur Année de publication : 2011 Article en page(s) : p. 459-467 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bois -- Revêtements protecteurs
Bois extérieursTags : 'Taches semi-transparentes' 'Traitement pression bois' 'Détérioration naturelle' 'Partial least square-regression (PLS-R) modeling' Index. décimale : 667.9 Revêtements et enduits Résumé : Understanding how a coating’s properties are related to its performance characteristics and how measuring its properties can be used for predicting the performance of coating in service was the main focus of this study. A number of exterior penetrating wood stains were characterized in terms of glass transition temperature (T g), solid content, viscosity, and surface tension. The contact angles of liquid coatings were measured on wood treated with chromated copper arsenate, alkaline copper quat, and copper azole as well as untreated wood. Also, the film thicknesses of the cured coatings on wood surfaces were measured by back-scattered electron imaging of osmium-treated samples. Partial least square-regression (PLS-R) modeling was used to correlate measured coating properties with their weathering performance on the preservative-treated and untreated wood substrates, based on water repellency, color retention, and visual ratings after 3 years of natural weathering. A PLS model was developed with 77% fitting accuracy and 69% prediction ability. This model indicated that preservative treatments significantly affected coating performance, and among coating properties, film thickness, viscosity, and glass transition temperature had the greatest effects on the coatings’ performance in exterior. DOI : 10.1007/s11998-011-9331-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9331-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12134
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Titre : The evolution of surface texture in automotive coatings Type de document : texte imprimé Auteurs : Cindy Peters, Auteur ; Mark E. Nichols, Auteur ; Kevin R. J. Ellwood, Auteur Année de publication : 2011 Article en page(s) : p. 469-480 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Automobiles -- Revêtements:Automobiles -- Peinture
Revêtements -- Texture
RhéologieIndex. décimale : 667.9 Revêtements et enduits Résumé : The curing behavior and texture development of automotive clearcoats was studied by noncontacting profilometry and dynamic viscosity measurements during solvent evaporation and thermal curing. The changing surface texture was shown to be a strong function of temperature and solvent content. Leveling occurred during the initial heating of the clearcoats, while smaller wavelength roughness was observed to appear during cooling after curing. The dynamic viscosity was shown to be a strong function of catalyst loading. Numerical simulations were conducted to calculate the apparent viscosity during the leveling process. Calculated viscosity profiles matched theoretical predictions for the behavior of these clearcoats. Note de contenu : EXPERIMENTAL METHODS : Materials - Rheology measurements - Surface profile - Weight loss - Spray application
LEVELING MODEL : Governing equations - Boundary conditions - Finite-element formulation
EXPERIMENTAL RESULTS : Modeling resultsDOI : 10.1007/s11998-011-9333-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9333-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12135
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Code-barres Cote Support Localisation Section Disponibilité 013158 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Preparation and anticorrosive performances of polysiloxane-modified epoxy coatings based on polyaminopropylmethylsiloxane-containing amine curing agent Type de document : texte imprimé Auteurs : Ling Chen, Auteur ; Shuxue Zhou, Auteur ; Shisen Song, Auteur ; Bin Zhang, Auteur ; Guangxin Gu, Auteur Année de publication : 2011 Article en page(s) : p. 481-487 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosion
Cardanol
Epoxydes
Revêtements
Revêtements protecteurs
SiliconesLes 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).
Spectroscopie d'impédance électrochimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : In this article, polysiloxane-modified epoxy coatings were prepared using the mixture (CPSA) polyaminopropylmethylsiloxane (PAPMS) oligomer/N-(2-hydroxyethyl)ethylenediamine as a curing agent and cardanol as a compatibilizer. The PAPMS oligomer was prepared from the controlled hydrolysis and condensation of (γ-aminopropyl)methyldimethoxysilane. Conventional epoxy coatings based on commercial phenalkamine epoxy curing agent (PECA) were also fabricated for comparison. The compatibility between the CPSA amine curing agent and epoxy resin was investigated by SEM and element-mapping measurements. The anticorrosive performances of the CPSA- or PECA-based epoxy coatings were thoroughly examined by electrochemical impedance spectroscopy (EIS), salt fog tests, and immersion experiments in acid (25 wt % NaCl). It was found that cardanol can dramatically improve the miscibility of CPSA with epoxy resins. Polysiloxane-modified (namely, CPSA-based) epoxy coatings have much better corrosion resistance than conventional (namely, PECA-based) epoxy coatings. Note de contenu : EXPERIMENTAL : Materials - Preparation of the hardener - Preparation of epoxy protective paints - Characterization
RESULTS AND DISCUSSION : FTIR analyses - The compatibility of CPSA with epoxy resin - Electrochemical impedance results - Anticorrosive performances - WeatherabilityDOI : 10.1007/s11998-010-9311-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-010-9311-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12136
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Titre : Radial structure of commercial styrene-co-butyl acrylate latex particles by means of synchrotron small-angle X-ray scattering under contrast-variation conditions Type de document : texte imprimé Auteurs : Xuelian Chen, Auteur ; Jianqi Zhang, Auteur ; Zhiyong Yi, Auteur ; Qiao Wang, Auteur ; Xiuhong Li, Auteur ; Fenggang Bian, Auteur ; Jie Wang, Auteur ; Yongfeng Men, Auteur Année de publication : 2011 Article en page(s) : p. 489-496 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Copolymère styrène acrylate de butyle
Core-Shell
Diffusion aux petits angles
Latex
Rayonnement synchrotronIndex. décimale : 667.9 Revêtements et enduits Résumé : Abstract The structural information of commercial styrene-co-butyl acrylate latex particles along radial direction was observed via the contrast-variation technique using synchrotron small-angle X-ray scattering (SAXS). By manipulating the electron density of the dispersion medium, the microstructural parameters of the latex dispersion were evaluated based on quantitative discussion of the scattering intensity distribution profiles. Four isoscattering points could be identified in the contrast-variation measurements, located at the scattering vectors corresponding to the position of the sharp minima of the scattering curve of homogenous spheres. This suggests that the shape and structure of particles were not affected by adding a certain amount of sucrose and salt. This phenomenon was attributed to the existence of the thin surface layers around particle core in the system. The data indicate that the latex particles exhibit a core-shell structure, and the average thickness of the shell is about 2 nm. Note de contenu : - Latex dispersions containing added sodium chloride
- Latex dispersions containing added sucroseDOI : 10.1007/s11998-010-9314-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-010-9314-x.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12137
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Titre : Investigating the antigraffiti properties of a polyurethane clearcoat containing a silicone polyacrylate additive Type de document : texte imprimé Auteurs : Mohammad Rabea, Auteur ; Mohsen Mohseni, Auteur ; Seyed Mojtaba Mirabedini, Auteur Année de publication : 2011 Article en page(s) : p. 497-503 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Energie de surface
Polyuréthanes
Revêtements anti-graffitis
SiliconesLes 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).
Vernis -- AdditifsIndex. décimale : 667.9 Revêtements et enduits Résumé : In this study, a polyurethane clearcoat was modified using a silicone polyacrylate antigraffiti additive and its surface free energy and mechanical properties were evaluated by various analytical techniques. The results showed that surface free energy decreased by replacing the polyol resin with the additive up to 10 mol%. Dynamic mechanical thermal analysis (DMTA) showed that the presence of the additive increased the storage modulus of the samples at ambient temperature. Evaluation of stainability of the coatings containing the additive revealed that a spray paint would be repelled from the surface showing a proper antigraffiti behavior. The additive did not affect the surface roughness of the films, indicating that the antigraffiti properties resulted from changes in surface chemistry due to migration of the additive to the surface. DOI : 10.1007/s11998-011-9324-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9324-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12138
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Code-barres Cote Support Localisation Section Disponibilité 013158 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Preparation and characterization of poly(MMA-BA)/nano-ATO hybrid latex via miniemulsion polymerization Type de document : texte imprimé Auteurs : Gui-Jun Zhang, Auteur ; Zhong-Hua Chen, Auteur ; Xing-rong Zeng, Auteur ; Fei Yu, Auteur ; Jin Wang, Auteur Année de publication : 2011 Article en page(s) : p. 505-511 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acrylate de butyle
Antimoine
Caractérisation
Dioxyde d'étain
Encapsulation
Miniémulsions
Nanoparticules
Polymérisation en émulsion
Polyméthacrylate de méthyleLe poly(méthacrylate de méthyle) (souvent abrégé en PMMA, de l'anglais Poly(methyl methacrylate)) est un polymère thermoplastique transparent obtenu par polyaddition dont le monomère est le méthacrylate de méthyle (MMA). Ce polymère est plus connu sous son premier nom commercial de Plexiglas (nom déposé), même si le leader global du PMMA est Altuglas International9 du groupe Arkema, sous le nom commercial Altuglas. Il est également vendu sous les noms commerciaux Lucite, Crystalite, Perspex ou Nudec.Index. décimale : 667.9 Revêtements et enduits Résumé : Abstract The poly(methyl methacrylate--n-butyl acrylate)/nano-antimony-doped tin oxide (ATO) hybrid latices were prepared successfully via miniemulsion polymerization in the presence of emulsifier sodium dodecyl sulfate (SDS) and costabilizer hexadecane (HD). Several factors affecting the encapsulation efficiency of nano-ATO were studied. The prepared hybrid latices were characterized using transmission electron microscopy, dynamic light scattering particle size analysis, thermogravimetric analysis, and ultraviolet--visiblenear infrared (NIR) spectra. The results show that the encapsulation efficiency of nano-ATO reaches the maximum value of 78.0% with 3 wt% of nano-ATO, 4 wt% of SDS, and 4 wt% of HD, and the mean diameter of hybrid latex particles is 87.5 nm. Both the weight loss ratio and the transmittance in NIR region of hybrid film decrease with the increasing nano-ATO amount. The prepared hybrid film containing nano-ATO exhibits excellent ability for shielding IR light with high transmittance in visible region, which can be used as transparent a heat-insulating coating for energy savings. Note de contenu : EXPERIMENTAL : Materials - Preparation of poly(MMA-BA)/nano-ATO hybrid latex - Preparation of polymer films - Characterization
RESULTS AND DISCUSSION : The encapsulation efficiency - Morphology and size of poly(MMA-BA)/ano-ATO hybrid latex particles - TG analysis - UV-Vis-NIR spectra of poly(MMA-BA)/nano-ATO hybrid filmsDOI : 10.1007/s11998-010-9318-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-010-9318-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12144
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Titre : Coatings applied on damp building substrates : performance and influence on moisture transport Type de document : texte imprimé Auteurs : Vânia Brito, Auteur ; Teresa Diaz Gonçalves, Auteur ; Paulina Faria, Auteur Année de publication : 2011 Article en page(s) : p. 513-525 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Revêtements en bâtiment Tags : 'Système peinture' 'Bâtiment ancien' 'Substrat humide' Séchage 'Transport humidité' Index. décimale : 667.9 Revêtements et enduits Résumé : Dampness is a common condition in old buildings and, accordingly, many paint systems specific for this type of building allow for application on walls with nonnegligible moisture content. In spite of that, performance evaluation of these paints is normally carried out using dry substrates or even on free paint films. This article presents research performed on 16 commercial paint systems: seven silicate, three silicone, three hydro-pliolite and two lime-based systems, as well as one common vinyl emulsion paint that served as reference. Each paint was applied and cured both on dry and on damp mortar substrates. The test specimens were subjected to water vapor permeability tests and evaporative drying tests. The following conclusions could be drawn: (i) the way paint systems influence the drying of the substrate, to which they were applied and where they cured, may vary significantly depending on the moisture content of that substrate; (ii) vapor permeability, measured with specimens applied and cured on dry substrate, may be an acceptable way of predicting a paint's influence on drying, provided that the paints are applied and cured on dry substrate or that their characteristics are not significantly affected by the moisture content of that substrate. Note de contenu : MATERIALS : Paint systems - Substrate material
METHODS : Preparation of the test specimens - Water vapor permeability tests Drying tests
DISCUSSION : Effect of the moistening condition of the substrate - Comparison between the performance of the different paint systems - Correlation between vapor permeability and drying indexDOI : 10.1007/s11998-010-9319-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-010-9319-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12145
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Titre : Wear and corrosion properties of electroless nickel composite coatings with PTFE and/or MoS2 particles Type de document : texte imprimé Auteurs : M. Mohammadi, Auteur ; M. Ghorbani, Auteur Année de publication : 2011 Article en page(s) : p. 527-533 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bains de placage
Bisulfure de Molybdène
Composites
Corrosion
NickelLe 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.
Polytétrafluoréthylène
Revêtements:PeintureIndex. décimale : 667.9 Revêtements et enduits Résumé : This study focuses on the effect of co-deposition of PTFE and/or MoS2 particles on the morphology, wear, and corrosion properties of electroless nickel coating. The composite coating of EN–PTFE–MoS2 was heat treated at different temperatures for hardness investigations. The surface morphology of coatings was characterized by scanning electron microscopy. Pin-on-disk and potentiodynamic polarization tests were used to study the tribological and corrosion properties of the coatings, respectively. Results of hardness analysis revealed that the hardness of electroless nickel coatings was increased by the heat treatment, and its maximum was gained at 400°C. Wear investigations showed that simultaneous co-deposition of the PTFE and MoS2 particles into the nickel coating increased the wear resistance of the coating by about 30% and reduced the average value of friction coefficient to 0.25 from 0.65. Corrosion studies illustrated that simultaneous co-deposition of the PTFE and MoS2 particles led to reduction in corrosion resistance by 10 and 5 times that of EN coating in brine and acidic solution, respectively. Note de contenu : - Characterization of coatings
- Wear propertiesDOI : 10.1007/s11998-011-9329-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9329-y.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12146
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Titre : Reduced indentation recovery temperature at the surface of a crosslinked epoxy coating in humid conditions Type de document : texte imprimé Auteurs : Shi Xiaodong, Auteur ; Stuart G. Croll, Auteur Année de publication : 2011 Article en page(s) : p. 535-539 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Epoxydes
Microscopie à force atomique
Nanoindentation
Réticulation à l'humidité
Revêtements:Peinture
Transition vitreuseIndex. décimale : 667.9 Revêtements et enduits Résumé : Relaxation of surface defects shows that the surface of a crosslinked epoxy system, under normal laboratory conditions, apparently has a softening transition temperature that is approximately 20°C lower than calorimetric measures of T g in the bulk. Physical aging data here confirms that this transition does resemble a glass transition. This observation is significant for properties that are determined by the surface of a coating. When ambient humidity is such that an epoxy may absorb significant quantities of moisture, it is plasticized, reducing its T g. When the relaxation of nanoindentations was measured in a humid environment, the value of this softening surface transition temperature was further reduced by 10°C. Thus, the surface properties of a polymer coating, such as wear, durability, friction, will depend not only on the ambient temperature, but also on whether the environment is humid. This is very important when such a coating responds to an environment that changes, e.g., natural weather. Note de contenu : - Surface transition temperature via indentation recovery
- Humidity-induced recoveryDOI : 10.1007/s11998-011-9335-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9335-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12147
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| Code-barres | Cote | Support | Localisation | Section | Disponibilité |
|---|---|---|---|---|---|
| 013158 | - | Périodique | Bibliothèque principale | Documentaires | Disponible |
