Catalyzed crosslinking of highly functional biobased epoxy resins / Thomas J. Nelson in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 5 (09/2013)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 5 (09/2013) . - p. 589-600 Titre : Catalyzed crosslinking of highly functional biobased epoxy resins Type de document : texte imprimé Auteurs : Thomas J. Nelson, Auteur ; Teluka P. Galhenage, Auteur ; Dean C. Webster, Auteur Année de publication : 2013 Article en page(s) : p. 589-600 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse mécanique dynamique Analyse thermique Biomatériaux Biopolymères Bisphénol A Catalyse Epoxydes Esters Matériaux -- Propriétés fonctionnelles Réticulation (polymérisation) Saccharose Soja et constituants Thermogravimétrie Transition vitreuse Index. décimale : 668.9 Polymères Résumé : Crosslinking reactions involving epoxy homopolymerization of 100% biobased epoxidized sucrose esters (ESEs) were studied and the resulting coatings properties were compared against epoxidized soybean oil (ESO) and petrochemical-based soybean fatty acid ester resins. The low viscosity of ESE resins allowed for formulations to be developed with minimal volatile organic content. ESEs were found to have superior coatings properties, compared to ESO and the petrochemical-based soybean esters, attributable to a higher glass transition temperature (T g) and a higher modulus. The rigid sucrose core on ESEs provided an increase in coating performance when compared to coatings from epoxidized resins synthesized with tripentaeryithritol as a core. The degree of conversion and optimization of the curing conditions were studied using differential scanning calorimetry (DSC). Thermal analysis of cured coatings was performed using DSC, dynamic mechanical analysis, and thermogravimetric analysis. In order to further enhance the coatings properties, small amounts of bisphenol A epoxy resin were added which resulted in higher moduli and Tgs. Note de contenu : - EXPERIMENTAL : Materials - Epoxidation reactions - MALDI analysis - Coating formulations - Thermal analysis - Coatings tests - Soxhlet extraction - RESULTS AND DISCUSSION : MALDI analysis - Catalyst study - Curing study - Coatings properties - Addition of BPA epoxy resin DOI : 10.1007/s11998-013-9488-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9488-0.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19778 [article]

Réservation

Réserver ce document

Exemplaires (2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
15618	-	Périodique	Bibliothèque principale	Documentaires	Disponible
15679	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Highly functional biobased polyols and their use in melamine–formaldehyde coatings / Thomas J. Nelson in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 6 (11/2013)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 6 (11/2013) . - p. 757-767 Titre : Highly functional biobased polyols and their use in melamine–formaldehyde coatings Type de document : texte imprimé Auteurs : Thomas J. Nelson, Auteur ; Bryan Masaki, Auteur ; Zachary Morseth, Auteur ; Dean C. Webster, Auteur Année de publication : 2013 Article en page(s) : p. 757-767 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biopolymères -- Synthèse Catalyseurs Copolymère mélamine-formaldéhyde Email Polyols Réticulation (polymérisation) Revêtement émail:Peinture-émail Revêtements Soyate de sucrose Index. décimale : 667.9 Revêtements et enduits Résumé : Highly functional sucrose soyate polyol (SSP) resins were synthesized by ring-opening epoxidized sucrose soyate with methanol or ethanol and were subsequently crosslinked with a melamine–formaldehyde (MF) resin in the presence of an acid catalyst or blocked acid catalyst. The biobased polyols were characterized by Fourier transform infrared spectroscopy, gel permeation chromatography, proton nuclear magnetic resonance spectroscopy, Brookfield viscosity, and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. The thermal properties of the biobased MF coatings were studied using differential scanning calorimetry and dynamic mechanical analysis. As controls, a soybean oil polyol (SBOP) with lower functionality and a commercial polyester polyol were studied for comparison. Overall, MF coatings formulated with SSPs showed superior properties to coatings formulated with SBOP and comparable properties to the commercial polyester which was attributed to the high hydroxyl functionality. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of SSPs - Characterization of polyols - Formulation and application procedures - Coating evaluation - RESULTS AND DISCUSSION - SYNTHESIS OF SSPs - POLYOL RESIN PROPERTIES - COATINGS PROPERTIES - BLOCKED ACID CATALYST STUDIES DOI : 10.1007/s11998-013-9524-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9524-0.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19815 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
15744	-	Périodique	Bibliothèque principale	Documentaires	Disponible

Monomer-grafted sucrose ester resins / Thomas J. Nelson in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 4 (07/2013)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 4 (07/2013) . - p. 515-525 Titre : Monomer-grafted sucrose ester resins Type de document : texte imprimé Auteurs : Thomas J. Nelson, Auteur ; Dean C. Webster, Auteur Année de publication : 2013 Article en page(s) : p. 515-525 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acides gras Esters -- Synthèse Esters de sucres Greffage (chimie) Monomères Polyalkydes Polystyrène Revêtements:Peinture Saccharose Soja et constituants Styrène Index. décimale : 667.9 Revêtements et enduits Résumé : Styrenated sucrose esters of soybean fatty acids were successfully synthesized and the coatings properties were found to be comparable to a commercial styrenated alkyd while having lower volatile organic content at comparable solids content. A series of reactions were performed which varied the percent styrene incorporated into the resin. The dry time was significantly reduced as the styrene content increased which was a result of having more hard polystyrene chain segments. Tack-free times of ?30 min were observed for resins containing high amounts of polystyrene. Nuclear magnetic resonance spectroscopy indicated residual bisallylic hydrogens were present which are capable of further crosslinking through autoxidation after film application. The addition of cobalt and zinc driers reduced the drying time which indicates that autoxidation is occurring. Furthermore, the styrenation reaction was extended to make water-reducible resins. These resins were crosslinked with a melamine–formaldehyde resin resulting in biobased thermosets having high solvent resistance, high hardness while retaining good flexibility. Note de contenu : - EXPERIMENTAL : Raw materials - Synthesis of styrenated partially esterified sucrose soyate - Synthesis of water-reducible styrenated partially esterified sucrose soyate - Coating formulation - Drying-time determination - Brookfield viscometry - Raman spectroscopy - 1H NMR spectroscopy - Coating characterization - Differential scanning calorimetry (DSC) - Gel permeation chromatography (GPC) - RESULTS AND DISCUSSION : Styrenation reaction - Coatings properties - Estimation of VOC - Water-reducible resins and baked coatings DOI : 10.1007/s11998-013-9486-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9486-2.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19101 [article]

Réservation

Réserver ce document

Exemplaires (2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
15460	-	Périodique	Bibliothèque principale	Documentaires	Disponible
15594	-	Périodique	Bibliothèque principale	Documentaires	Disponible

---

1 (1 - 3 / 3)