Stress development and film formation in multiphase composite latexes / Kyle Price in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 6 (11/2014)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 6 (11/2014) . - p. 827-839 Titre : Stress development and film formation in multiphase composite latexes Type de document : texte imprimé Auteurs : Kyle Price, Auteur ; Wenjun Wu, Auteur ; Kurt Wood, Auteur ; Stephanie Kong, Auteur ; Alon McCormick, Auteur ; Lorraine F. Francis, Auteur Année de publication : 2014 Article en page(s) : p. 827-839 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse des données Caractérisation Composites Core-Shell Cryotechnique Evaluation Formation de film Latex Liants Microscopie électronique à balayage Morphologie (matériaux) Particules -- Morphologie Revêtement -- Séchage:Peinture -- Séchage Index. décimale : 667.9 Revêtements et enduits Résumé : Designed appropriately, multiphase soft-core/hard-shell latex particles can achieve film formation without the addition of a coalescing aid, while preserving sufficient film hardness. Achieving optimal performance in these materials requires an under-standing of how particle morphology affects film formation and stress development in the film. In this study, soft-core/hard-shell latex particles with different shell ratios, core and shell glass transition temperatures(Tgs), and particle sizes (63–177 nm) were synthesized using a two-stage emulsion polymerization. The film formation behavior of the composite particles was investigated with cryogenic scanning electron micro-scopy, atomic force microscopy, and measurements of the minimum film formation temperature (MFFT). Results show that film formation was enhanced for particles with thinner hard shells, smaller particle size, and a smaller difference in Tg between the core and shell polymers. For example, the MFFT decreased and the particle deformation increased for particles with thinner shells and smaller article sizes. Stress development during drying was characterized using a cantilever beam bending technique. A walled cantilever design was used to monitor stress development without the complication of a lateral drying front. The film formation behavior and stress development correlated well with practical paint properties like scrub resistance and gloss. Note de contenu : - EXPERIMENTAL : Binder evaluation - Paint evaluation - Block resistance - Scrub resistance - Data analysis using JMP - Stress measurement - Characterization methods - RESULTS AND DISCUSSION : Particle morphology - Film formation - Stress development - Paint performance DOI : 10.1007/s11998-014-9606-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9606-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22307 [article]

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