Synthesis and properties of UV - curable polyester - based waterborne polyurethane / functionalized silica composites and morphology of their nanostructured films / Lihui Zhang in Industrial & engineering chemistry research, Vol. 51 N° 25 (Juin 2012)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 51 N° 25 (Juin 2012) . - pp. 8434-8441 Titre : Synthesis and properties of UV - curable polyester - based waterborne polyurethane / functionalized silica composites and morphology of their nanostructured films Type de document : texte imprimé Auteurs : Lihui Zhang, Auteur ; Hong Zhang, Auteur ; Jinshan Guo, Auteur Année de publication : 2012 Article en page(s) : pp. 8434-8441 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Morphology Composite material Ultraviolet radiation Résumé : In this study, environmentally friendly UV-curable polyester-based waterbome polyurethane (WPU)/ functionalized silica nanocomposites were successfully prepared. The functionalized silica was combined with WPU by chemical bonds and existed as effective cross-link points to form composites. Because of the existence of organic molecule chains from the functionalized silica, the compatibility of WPU with silica was improved obviously. This makes the composite latex possesses certain stability when the silica content rose up to 17.5 wt %. The composite latex particles kept the structure where the functionalized silica was covered by WPU during the film formation process, which could greatly decrease the aggregation of silica. What's more, the existence of functionalized silica improved thermo-stability, hardness, and water resistance of composite films effectively and the composite films possessed good transparency. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26066771 [article] Synthesis and properties of UV - curable polyester - based waterborne polyurethane / functionalized silica composites and morphology of their nanostructured films [texte imprimé] / Lihui Zhang, Auteur ; Hong Zhang, Auteur ; Jinshan Guo, Auteur . - 2012 . - pp. 8434-8441. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 25 (Juin 2012) . - pp. 8434-8441 Mots-clés : Morphology Composite material Ultraviolet radiation Résumé : In this study, environmentally friendly UV-curable polyester-based waterbome polyurethane (WPU)/ functionalized silica nanocomposites were successfully prepared. The functionalized silica was combined with WPU by chemical bonds and existed as effective cross-link points to form composites. Because of the existence of organic molecule chains from the functionalized silica, the compatibility of WPU with silica was improved obviously. This makes the composite latex possesses certain stability when the silica content rose up to 17.5 wt %. The composite latex particles kept the structure where the functionalized silica was covered by WPU during the film formation process, which could greatly decrease the aggregation of silica. What's more, the existence of functionalized silica improved thermo-stability, hardness, and water resistance of composite films effectively and the composite films possessed good transparency. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26066771

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