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Colour predictions in particulate matter from size and refractive index of particles / H. S. Shah in PAINTINDIA, Vol. L, N° 4 (04/2000)
[article]
Titre : Colour predictions in particulate matter from size and refractive index of particles Type de document : texte imprimé Auteurs : H. S. Shah, Auteur ; M. S. Roy, Auteur Année de publication : 2000 Article en page(s) : p. 43-52 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Etude théorique' Colorimétrie 'Indice réfraction' 'Dimension particule' 'Réflexion diffuse' expérimentale' Poudre 'Mélange binaire' ternaire' Pigment Index. décimale : 667.9 Revêtements et enduits Résumé : A theoretical relation correlating particle size and refractive index with diffuse reflectance of particulate system is proposed. Fundamental optical and morphological parameters of particulate systems are determined. Colourimetric curves of seven single component and fifteen binary/ternary mixtures are experimentally measured and compared with predicted curves determined using proposed relation. Overall performance evaluation of the theoretical formulation is made by determining colour difference between measured and calculated curves. Results show that the proposed method satisfactorily work to assess the colourimetric curves of particulate matter. The theoretical technique will be useful to study the colour change due to variation in size in pigment dispersions or chemical powders. Note de contenu : - Experimental : Preparation of samples - Methods of measurements
- Optical and morphological characterstics of particle : Particle size measurement - Determination of absorption index k - Results - Lambert-Beer absorption coefiecient of powdered samples - Reflectance spectra of single component system - Reflectance spectra of binary and ternary powdered mixturesPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12724
in PAINTINDIA > Vol. L, N° 4 (04/2000) . - p. 43-52[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001252 - Périodique Bibliothèque principale Documentaires Disponible A study on epoxy-alkyd-amino three-component system / P. L. Joshi in PAINTINDIA, Vol. XLVIII, N° 1 (01/1998)
[article]
Titre : A study on epoxy-alkyd-amino three-component system Type de document : texte imprimé Auteurs : P. L. Joshi, Auteur Année de publication : 1998 Article en page(s) : p. 35-42 Langues : Anglais (eng) Tags : Peinture Liant 'Système ternaire' 'Résine époxyde ' alkyde' Polyamine 'Propriété physique' optique' mécanique' Feuil Index. décimale : 667.9 Revêtements et enduits Résumé : The three-component Epoxy-Alkyd-Amino system finds very important place in industrial applications for stoving paints for refrigerators, washing machines, kitchen appliances, domestic water filters, etc., giving excellent adhesion on M.S. and Aluminium surfaces, very high chemical, solvent and boiling water resistance. Therefore, a study is made for selection of appropriate type of resins and suitable solvent mixtures so as to get long storage stability, godd compatibility and solubility, and finally impating maximun resistance to solvents, chemicals, detergents and boiling water resistance to the ultimate coatings. Note de contenu : - Plan of experiments and selection of ingredients
Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13101
in PAINTINDIA > Vol. XLVIII, N° 1 (01/1998) . - p. 35-42[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006472 - Périodique Bibliothèque principale Documentaires Disponible The role of surfactant on the film formation of latex polymers / P. Nagarajan in PAINTINDIA, Vol. XLVI, N° 2 (02/1996)
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Titre : The role of surfactant on the film formation of latex polymers Type de document : texte imprimé Auteurs : P. Nagarajan, Auteur ; C. K. Mital, Auteur ; M. K. Trivedi, Auteur Année de publication : 1996 Article en page(s) : p. 19-24 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Latex 'Réseau polymère interpénétré' 'Méthacrylate méthyle polymère' 'Acrylate butyle 'Méthacrylique acide 'Système ternaire' 'Formation film' 'Agent surface' 'Propriété 'Tension superficielle' Index. décimale : 667.9 Revêtements et enduits Résumé : Two different latex interpenetrating polymer networks (LIPNs), comprising of polyacrylate (methyl methacrylate: n-butyl acrylate: methacrylic acid-43:57: 2.5) as seed and second polymer as polystyrene and polymethyl methacrylate, having a difference in hydrophilicity have been prepared. Surface tension measurements, were carried out to demonstrate the difference in adsorption equilibria of the anionic surfactant, sodium dodecyl sulphate on the different latex particles, with change in pH. the films were cast at different pHs, and it was found that the film of styrene based LIPN at a low pH (3.3), yielded translucent film while transparent films were also obtained from styrene based LIPN at a higher pH of 9, neutralized with NaOH. The higher strength of the latex films, obtained at the pH of 9 than those obtained at pH 3.3 of the styrene based LIPNs, indicates that the reduction in the polymer-water interfacial tension enhances the coalescence. It has been demonstrated clearly by the experimental evidence, that adsorption of surfactant on polymer, in styrene based latexes and the exudation of the surfactant in MMA based latexes, results in major difference in the optical clarity of the latex films. Note de contenu : - Preparation of LIPNs
- Surface tension measurements
- Transparency of the films
- Tensile strength
- Spectral measurementsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13390
in PAINTINDIA > Vol. XLVI, N° 2 (02/1996) . - p. 19-24[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006500 - Périodique Bibliothèque principale Documentaires Disponible