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Using dispersion/flocculation phase diagrams to visualize interactions of associative polymers, latexes, and surfactants / Edward Kostansek in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 75, N° 940 (05/2003)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 75, N° 940 (05/2003) . - p. 27-34 Titre : Using dispersion/flocculation phase diagrams to visualize interactions of associative polymers, latexes, and surfactants Type de document : texte imprimé Auteurs : Edward Kostansek, Auteur Année de publication : 2003 Article en page(s) : p. 27-34 Note générale : Bibliogr. Langues : Américain (ame) Tags : Polymère  associatif  Interaction  intermoléculaire  Dispersion  Floculation  Formulation  Agent  surface  anionique  Epaississant  Adjuvant  Latex  Electrolyte  polymère  Diagramme  phase  Peinture  Mécanisme  réaction Index. décimale : 667.9 Revêtements et enduits Résumé : The colloidal interactions of associative polymers and latexes in the presence of surfactant is complex. This is because, in addition to good particle dispersion, both bridging and depletion flocculation can occur. Therefore, we have developed phase diagrams to help visualize these interactions. The various phases have a significant effect on coatings and applications properties. Examples of phase diagrams are presented for a model HEUR nonionic associative polymer and latexes in the presence of sodium dodecylsulfate. The major variables affecting phase behavior were found to be associative polymer concentration, latex particle size, latex surface hydrophobicity, and electrolyte, cosolvent, and surfactant concentrations. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5584 [article]

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Theoretical development of a graphical analysis technique to optimize the particle size distribution of pigments in paints and coatings / Richard D. Sudduth in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 75, N° 940 (05/2003)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 75, N° 940 (05/2003) . - p. 35-41 Titre : Theoretical development of a graphical analysis technique to optimize the particle size distribution of pigments in paints and coatings Type de document : texte imprimé Auteurs : Richard D. Sudduth, Auteur Année de publication : 2003 Article en page(s) : p. 35-41 Note générale : Bibliogr. Langues : Américain (ame) Tags : Propriété  rhéologique  Formulation  Modélisation  Distribution  dimension  particule  Pigment  Dimension  Peinture  Matériau  revêtement Index. décimale : 667.9 Revêtements et enduits Résumé : The new analytical expression introduced in this study shows that a plot of the accumulated volume fraction of pigment particles vs. the square root of particle size shoold be a staight line for the theoretically preferred particle size distribution. This linear theoretical model was also found to be consistent with the experimentally developed linear model proposed by Kaeuffer. However, Kaeuffer proposed that his straight line went through the origin, but the analytical model developed in this paper has shown that this intercept is not zero. Thus, Kaeuffer's experimental model is only partially correct. Starting with this new linear model for the theoretically preferred particle size distribution, another simplified analytical expression was also derived to calculate the xth moment average particle size, Dx. The desired xth moment average particle size was found to depend primarily on the physical property to be predicted. Finally, the simplified calculation of the various Dx particle size averages for this same square root particle size distribution should be useful in predicting the maximum packing fraction, maximum impact, and/or the minimum viscosity for pigments in most paint and coating applications Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5589 [article]

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Study of infrared thermal images of chameleon - type building coatings / Yiping Ma in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 75, N° 940 (05/2003)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 75, N° 940 (05/2003) . - p. 43-47 Titre : Study of infrared thermal images of chameleon - type building coatings Type de document : texte imprimé Auteurs : Yiping Ma, Auteur ; J. Xu, Auteur ; Beirong Zhu, Auteur ; Keru WU, Auteur Année de publication : 2003 Article en page(s) : p. 43-47 Note générale : Bibliogr. Langues : Américain (ame) Tags : Bâtiment  Absorption  énergie  Propriété  surface  Formulation  Pigment  Thermométrie  IR  Thermochromisme  Matériau  revêtement Index. décimale : 667.9 Revêtements et enduits Résumé : As reported in this article, infrared thermal images of chameleon-type building coatings were studied. The results show that when reversibly thermochromic pigments were added to normal white building coatings, so-called chaemelon-type building coatings could absorb energy from a sunlamp below a switching temperature of 20°C. The surface temperatures could reach almost the same value as that of a normal colorful building coating. The absorption stopped automatically above the switching temperature of 20°C, and the surface temperatures could be lower than that of normal colorful building coatings by about 4°C. The results from exposure to solar radiation show that when the temperature was below the switching temperature, the chameleon-type building coating could absorb almost the same amount of solar energy as an ordinary colorful coating. When the temperature was above the switching temperature, these coating could reflect more solar energy than the ordinary colorful coating, which was similar to the results from infrared thermal images. All the results show that there is some posibility that the chameleon-type building coatings could be used to create a thermally comfortable building environment. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5590 [article]

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