Theoretical study and experimental analysis of the scattering efficiency of hollow polymer particles in the dependent light scattering regime / J.-C. Auger in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 4 (07/2015)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 4 (07/2015) . - p. 693-709 Titre : Theoretical study and experimental analysis of the scattering efficiency of hollow polymer particles in the dependent light scattering regime Type de document : texte imprimé Auteurs : J.-C. Auger, Auteur ; Daragh Mcloughlin, Auteur Année de publication : 2015 Article en page(s) : p. 693-709 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Corps creux Diffraction Lumière -- Diffusion Opacité (optique) Particules (matières) Polymères -- Propriétés optiques Revêtements:Peinture Transfert radiatif Index. décimale : 667.9 Revêtements et enduits Résumé : We present an extensive theoretical study of the optical properties of hollow polymer particles (HPP) dispersed into a polymer resin as functions of their structure and volume-filling fraction. We show that a dependent light scattering model predicts the occurrence of three different light propagation regimes, the existence of which is consistent with experimental data gathered in the literature. We then analyze the effect of the polymer shell thickness on the magnitude of the near-field and far-field dependent light scattering phenomena. We also discuss and compare the variation of the scattering efficiency of Ropaqueâ„¢, measured in our laboratory, as a function of the pigment volume-filling fraction, with dependent light scattering model. In particular, we show that in the case of HPP, quasi-linear variation of the scattering efficiency as a function of the particle volume-filling fraction is not an undeniable indication of the absence of electromagnetic couplings in the system. Finally, we used a solution of the radiative transfer equation to compare the prediction of the opacity of several simple paint films when a dependent light scattering model is used instead of the independent scattering approximation to calculate the optical properties of the films at a local scale. Note de contenu : - THEORETICAL ANALYSIS : Theoretical framework - Identification of the light scattering regimes - Optimum radius - Characterization of the type of electromagnetic couplings in the different light scattering regimes - Effect of the polymer shell's thickness - EXPERIMENTAL EVIDENCE OF HPPs' LIGHT PROPAGATION REGIMES : Origin of the experimental data - Scattering efficiency analysis procedure - Clarification of the condition at zero PVC - Results and interpretation - ANALYSIS OF ROPAQUE ULTRA TM OPTICAL PROPERTIES : Description and analysis of the experimental data - Analysis of the experimental data via the QCA - INTERPRETATION OF QUASI-LINEAR VARIATION IN TERMS OF ELECTROMAGNETIC COUPLINGS - EFFECT OF ELECTROMAGNETIC COUPLING ON MACROSCOPIC PARAMETERS DOI : 10.1007/s11998-015-9677-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9677-0.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24404 [article]

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