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Investigation of the properties of UV-curing acrylate-terminated unsaturated polyester coatings by utilizing an experimental design methodology / Ahmet Nebioglu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 4 (12/2007)
[article]
Titre : Investigation of the properties of UV-curing acrylate-terminated unsaturated polyester coatings by utilizing an experimental design methodology Type de document : texte imprimé Auteurs : Ahmet Nebioglu, Auteur ; Mark D. Soucek, Auteur Année de publication : 2008 Article en page(s) : p. 425-433 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cinétique chimique
Esters
Fourier, Spectroscopie infrarouge à transformée de
Polyesters insaturésLes résines de polyesters insaturés (UP) sont obtenues par polycondensation
d’un ou de plusieurs diacides avec un ou plusieurs glycols, l’un, au moins, des constituants contenant une double liaison éthylénique susceptible de réagir ultérieurement sur un composé vinylique, acrylique ou allylique.
Par le terme résine polyester, on désigne en fait la dissolution du prépolymère polyester insaturé dans un solvant copolymérisable, le plus utilisé étant le styrène. C’est sous cette forme liquide que les résines polyesters sont livrées aux transformateurs.
Après addition de différents adjuvants, charges et renforts, divers procédés de transformation provoquent, sous l’action d’un système catalytique approprié, la copolymérisation finale de la résine en un objet thermodurcissable.
Les polyesters insaturés sont d’un usage relativement ancien (1950), essentiellement
dans le bâtiment (moulage au contact). Ils ont connu un renouveau important à partir de 1980, en particulier au niveau des formulations et de la fiabilité des procédés grâce au développement de technologies industrielles de moulage par injection et par compression dans l’industrie automobile.
Réflexion totale atténuée
Résonance magnétique nucléaire
Revêtements -- Séchage sous rayonnement électronique
Revêtements -- Séchage sous rayonnement ultraviolet
solvants
Thermodurcissables
Triacrylate de triméthylolpropaneIndex. décimale : 667.9 Revêtements et enduits Résumé : The effect of the extent of internal unsaturation and branching on the properties of the acrylated polyester films was investigated. Polyester acrylate resins were prepared based on adipic acid, maleic anhydride, neopentyl glycol, trimethylolpropane, and acrylic acid. As the reactive diluent, trimethylolpropane triacrylate (TMPTA) was used. Experiments were planned according to the three-factor, three-level Box-Behnken design. Coating film properties were evaluated in terms of the independent variables, amount of branching, internal unsaturation, and reactive diluent. DOI : 10.1007/s11998-007-9035-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9035-y.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3630
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 4, N° 4 (12/2007) . - p. 425-433[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 009005 - Périodique Bibliothèque principale Documentaires Disponible Network formation and thermo-mechanical properties of photo-curing hybrid coatings / Ahmet Nebioglu / 2006
Titre : Network formation and thermo-mechanical properties of photo-curing hybrid coatings Type de document : texte imprimé Auteurs : Ahmet Nebioglu, Auteur ; Graduate Faculty of the University of Akron (Akron, Ohio - United State), Organisme de soutenance Année de publication : 2006 Importance : XVII-169 p. Présentation : ill. Format : 30 cm Note générale : Bibliogr. Catégories : Matériaux hybrides -- Propriétés thermomécaniques
Polyesters
Réticulation (polymérisation)
Thèses et écrits académiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : UV-moisture dual curable inorganic/organic hybrid coatings based on unsaturated polyester binders and silicate-clusters were successfully prepared. In situ formed nano to micro size inorganic clusters increased the abrasion resistance, adhesion, tensile strength and fracture toughness of the films. Free radical UV-crosslinking process was used to form the organic phase. An isocyanate functional alkoxysilane coupling agent was used to connect organic and inorganic phases.The effects of the silicate groups on the free radical photo-curing reaction kinetics were investigated utilizing a time-resolved Fourier transform infrared (FT-IR) spectroscopy and a differential scanning calorimeter equipped with a photocalorimetric accessory (photo-DSC). Inorganic network formation during the UV-initiated free radical crosslinking reactions was suggested to describe the complex gel-point behavior. It was proposed that inorganic silicate groups retard the organic crosslinking reactions. In order to depict the interaction of the silicate clusters and organic network formation, it was necessary to characterize the organic network structure. Therefore, a series of methods including dynamic mechanical thermal analysis and dynamic light scattering were utilized to understand the nature of the organic crosslinking reactions. The effect of the placement, i.e. whether internal or terminal, of the unsaturation on the polyester chains and concentration of the reactive monomer on the network structure formation was investigated. It was found that intramolecular cyclization reactions were detrimental in the network structure, and hence final film properties. Inclusion of the silicate groups inhibit the intramolecular cyclization reactions, and therefore affect the organic network structure formation. The UV-cured inorganic/organic hybrid films showed more homogeneous film morphology compared to the organic counterparts. In hybrid films a core-shell like inorganic/organic particle morphology was observed. The UV-crosslinked organic part forms the inside core, whereas the inorganic silicate part forms the surrounding shell. Network formation mechanism and film properties were extensively changed with the formation of these colloidal particles. Thèse : Thèse. Spécialité Génie chimique : University of Akron - Akron (USA) - 2006 En ligne : https://etd.ohiolink.edu/rws_etd/document/get/akron1145166725/inline Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29886 Optimization of UV curable acrylated polyester-polyuréthane/polysiloxane ceramer coatings using a response surface methodology / Ahmet Nebioglu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 3, N° 1 (01/2006)
[article]
Titre : Optimization of UV curable acrylated polyester-polyuréthane/polysiloxane ceramer coatings using a response surface methodology Type de document : texte imprimé Auteurs : Ahmet Nebioglu, Auteur ; Mark D. Soucek, Auteur Année de publication : 2006 Article en page(s) : p. 61-68 Note générale : Bibliogr. Langues : Américain (ame) Tags : Photochemistry organosilane UV EB radiation cure adhesion design of experiments statistical isocyanate aluminum Index. décimale : 667.9 Revêtements et enduits Résumé : Dual UV and moisture curable acrylated polyester, organic/inorganic hybrid coatings were prepared using a coupling agent and tetraethylorthosilicate (TEOS) oligomers. An acrylated polyester resin based on adipic acid, neopentyl glycol, trimethylolpropane, and acrylic acid was synthesized. TEOS oligomers were prepared through the hydrolysis and condensation of TEOS with water and 3-(triethoxysilyl)propylisocyanate (TEOSPI) was used as the coupling agent between organic and inorganic phases. Trimethylolpropane triacrylate (TMPTA) was used as a reactive diluent. The formulations were cured into films by utilizing UV, followed by moisture curing. The resultant coatings were evaluated in terms of tensile and fracture toughness properties by using ANOVA. Effects of the TEOS oligomers, TEOSPI, and TMPTA on the free radical UV polymerization kinetics were also investigated. The experiments were planned according to the three-factor, three-level Box-Behnken design. Reaction kinetics, fracture toughness, and tensile properties were evaluated in terms of the concentrations of TEOS oligomers, TEOSPI, and TMPTA concentrations. DOI : 10.1007/s11998-006-0006-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-006-0006-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3721
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Code-barres Cote Support Localisation Section Disponibilité 003762 - Périodique Bibliothèque principale Documentaires Disponible