Syntheses of novel photosensitive polysiloxanes and their effects on properties of UV-cured epoxy methacrylate coatings / Chunyi Tang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 7, N° 5 (09/2010)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 7, N° 5 (09/2010) . - p. 651-658 Titre : Syntheses of novel photosensitive polysiloxanes and their effects on properties of UV-cured epoxy methacrylate coatings Type de document : texte imprimé Auteurs : Chunyi Tang, Auteur ; Weiqu Liu, Auteur Année de publication : 2010 Article en page(s) : p. 651-658 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bisphénol A Epoxydes Méthacrylate de méthyle Revêtements -- Séchage sous rayonnement ultraviolet Silicones Les silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki). Index. décimale : 667.9 Revêtements et enduits Résumé : Two UV-curable polysiloxanes—side methacryloxy group polysiloxanes (MAPS) —were successfully synthesized through a two-step reaction. Two series of various percentages of these synthesized MAPS were then cured with bisphenol-A epoxy methacrylate (BEMA) via UV radiation to obtain cured coatings. We found that the additive MAPS improved the thermal stability of the cured coatings. It not only reduced the surface energy of the coatings, but also significantly affected the other properties, including gloss, flexibility, and water resistance. Compared to the phase separation between BEMA and MAPS-1 with lower volume of methacryloxy groups, MAPS-2 with higher volume of methacryloxy groups dispersed uniformly in BEMA, thereby provding good performances for such coating materials. DOI : 10.1007/s11998-010-9247-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-010-9247-4.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9919 [article]

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UV-curable waterborne epoxy acrylate coating modified by monomethacryloyloxy-terminated fluorinated oligomer / Hongyi Shi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 5 (09/2019)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 5 (09/2019) . - p. 1305-1316 Titre : UV-curable waterborne epoxy acrylate coating modified by monomethacryloyloxy-terminated fluorinated oligomer Type de document : texte imprimé Auteurs : Hongyi Shi, Auteur ; Weiqu Liu, Auteur ; Chunhua Liu, Auteur ; Sha He, Auteur ; Chi Jiang, Auteur ; Zhengfang Wang, Auteur Année de publication : 2019 Article en page(s) : p. 1305-1316 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Copolymère époxy acrylate Emulsifiants Energie de surface Fluoropolymères Oligomères Polymères en émulsion Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : Monomethacryloyloxy-terminated fluorinated oligomers (PPFOMA-GMA and PHFBMA-GMA) and methyl allyl alcohol polyoxyethylene ether-modified epoxy resin (HPEGEA) were successfully synthesized and used as reactive additives and emulsifier for epoxy acrylate, respectively. FTIR, 1H NMR, and GPC were used to characterize the structures of PPFOMA-GMA, PHFBMA-GMA, and HPEGEA. The influence of the concentrations of PPFOMA-GMA and PHFBMA-GMA on the properties of waterborne epoxy acrylate (WEA) resin coatings was investigated. The surface energy of waterborne epoxy acrylate coating was decreased from 38.20 mN/m to 15.31 mN/m by adding just 0.21 wt% PPFOMA-GMA, indicating its high effectiveness in improving the hydrophobic properties of the surface. The surface compositions of the WEA resin coatings (with 0.85 wt% PPFOMA-GMA or 0.85 wt% PHFBMA-GMA) were characterized by XPS. The XPS results confirmed the quantitative enrichment of fluorine atoms on the surface. What is more, the physical properties of waterborne epoxy acrylate coatings prepared with different concentrations of fluorinated reactive additive, such as optical transmittance, adhesion (on glass, PET, and tinplate), pencil hardness, water absorption, and thermal properties, were also analyzed in detail. Hence, the waterborne epoxy acrylate coatings prepared with low concentrations of reactive additives were economical and have potential for large-scale industrial applications. Note de contenu : - EXPERIMENTAL : Materials -Synthesis of PPFOMA-GMA and PHFBMA-GMA - Synthesis of EA and HEPGEA - Preparation of UV-curable waterborne epoxy acrylate - Preparation of UV-curable waterborne epoxy acrylate coatings - Characterization - RESULT AND DISCUSSION : Chracterization of PHFBMA-GMA and PPFOMA-GMA, and HPEGEA - Surface properties of F0, F1, F2, F3, and F4 coating - Surface compositions of F1, F2, F3, and F4 coating - Pencil hardness, adhesion, and water absorption of F1, F2, F3, and F4 coating - Thermal properties of F1, F2, F3, and F4 coating - Optical properties of F1, F2, F3, and F4 coating DOI : 10.1007/s11998-019-00209-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-019-00209-2.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33013 [article]

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