Preparation, characterization and properties of UV-curable waterborne polyurethane acrylate/siO2 coating / Qiu Fengxian in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 5 (09/2012)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 9, N° 5 (09/2012) . - p. 503-514 Titre : Preparation, characterization and properties of UV-curable waterborne polyurethane acrylate/siO2 coating Type de document : texte imprimé Auteurs : Qiu Fengxian, Auteur ; Heping Xu, Auteur ; Yingying Wang, Auteur ; Jicheng Xu, Auteur ; Dongya Yang, Auteur Année de publication : 2012 Article en page(s) : p. 503-514 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Dioxyde de silicium Matériaux hybrides Polyacrylates Polyuréthanes Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques Revêtements en phase aqueuse -- Séchage sous rayonnement ultraviolet:Peinture en phase aqueuse -- Séchage sous rayonnement ultraviolet Sol-gel, Procédé Index. décimale : 667.9 Revêtements et enduits Résumé : The UV-curable waterborne polyurethane acrylate (UV-WPUA) oligomer was first prepared based on isophorone diisocyanate (IPDI), polyether polyol (NJ-220), dimethylol propionic acid (DMPA), and hydroxyethyl methyl acrylate (HEMA) via an in situ method. With the different content tetraethoxysilane (TEOS) and 3-glycidyloxypropyltrimethoxysilane (GLYMO) as coupling agents, a series of waterborne UV-WPUA/SiO2 oligomers were prepared by the sol–gel process. The physical and mechanical properties of the UV-WPUA and UV-WPUA/SiO2 hybrid coating materials were measured. The UV-WPUA and WPUA/SiO2 hybrid materials were characterized using FTIR spectra, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), scanning electron microscope (SEM), transmission electron microscope (TEM), and X-ray diffraction (XRD) measuring apparatuses to determine their structures, thermal properties, surface morphologies, etc. The results showed the SiO2 particles of the hybrid materials had wide dispersion, forming a good interfacial bonding layer on surfaces. The tensile strength, water resistance, and thermal properties of the hybrid materials were better than those of the UV-WPUA. The resulting UV-WPUA/SiO2 hybrids are promising for a number of applications, e.g., for high-performance water-based UV-curable coatings. Note de contenu : - EXPERIMENTAL PROCEDURE : Materials - Preparation of UV-WPUA oligomer - Preparation of UV-WPUA/SiO2 hybrid oligomer - Preparation of UV-WPUA0 and UV-WPUA/SiO2 hybrid coating films - The apparent viscosity of UV-WPUA and hybrid oligomers - The particle size and polydispersity of UV-WPUA and hybrid oligomers - Structure characterization of the UV-WPUA and hybrid oligomers - The surface drying time of UV-WPUA0 and hybrid coatings films - The gel content of UV-WPUA0 and hybrid coating films - The hardness of UV-WPUA0 and hybrid coating films - The tensile strength and elongation at break of UV-WPUA0 and hybrid films - The water absorption (or swelling degree) of UV-WPUA0 and hybrid films - Thermal properties - SEM - TEM - XRD - RESULTS AND DISCUSSION : The physical properties of UV-WPUA and hybrid oligomers - The mechanical properties of UV-WPUA0 and hybrid coating films - The water absorption (or swelling degree) of UV-WPUA0 and hybrid coating films - Structure characterization, thermal properties and morphology characterization of UV-WPUA0 and hybrids DOI : 10.1007/s11998-012-9397-7 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-012-9397-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16011 [article]

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