Effects of NCO:OH ratio and HEMA on the physicochemical properties of photocurable poly(ester-urethane)methacrylates / Ganesh S. Bhusari in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 3 (05/2015)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 3 (05/2015) . - p. 571-585 Titre : Effects of NCO:OH ratio and HEMA on the physicochemical properties of photocurable poly(ester-urethane)methacrylates Type de document : texte imprimé Auteurs : Ganesh S. Bhusari, Auteur ; Suresh S. Umare, Auteur ; Ajay S. Chandure, Auteur Année de publication : 2015 Article en page(s) : p. 571-585 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Copolymères -- Synthèse Diisocyanate d'isophorone Hydrolyse Photoréticulation Polyester uréthane méthacrylate Polymères -- Propriétés thermomécaniques Polyméthacrylate d'hydroxyéthyle Résistance chimique Revêtements -- Détérioration Revêtements -- Séchage sous rayonnement ultraviolet Index. décimale : 667.9 Revêtements et enduits Résumé : A series of UV-curable isophorone diisocyanate-based poly(ester-urethane)methacrylate (IPEUMA) oligomers were synthesized by a two-step polymerization process. The amount of isophorone diisocyanate was varied during the synthesis. The effects of NCO:OH ratio and HEMA on the structural and physicochemical properties of UV-cured IPEUMAs were investigated. As the NCO:OH ratio increased, the tensile strength and thermal stability increased, whereas the elongation and hydrolytic degradation of the film decreased. The higher strength and thermal stability for higher NCO:OH ratio may be due to the increase in intermolecular hydrogen bonding in the UV-cured film. UV-cured IPEUMA films also show excellent chemical and solvent resistance. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of polyneopentyl-succinate (PNSu) - Synthesis of IPEUMAs - UV-curing process - CHARACTERIZATION : Hydrolytic degradation - RESULTS AND DISCUSSION : Structural investigation - FTIR spectra - 1H-NMR spectra - XRD pattern - Physicochemical parameters - Solvent and chemical resistance - Mechanical properties - Thermal properties - Hydrolytic degradation - Surface morphology DOI : 10.1007/s11998-014-9635-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9635-2.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24181 [article]

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