Chemical, mechanical, and thermal properties of UV-curable cellulose acetate butyrate-based oligomers and their electrospun fibrous mats / Ozan Gazi Dehmen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 4 (07/2020)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 4 (07/2020) . - p. 1043-1052 Titre : Chemical, mechanical, and thermal properties of UV-curable cellulose acetate butyrate-based oligomers and their electrospun fibrous mats Type de document : texte imprimé Auteurs : Ozan Gazi Dehmen, Auteur ; Hacen Aysen Onen, Auteur ; Zehra Yildiz, Auteur ; Atilla Güngör, Auteur Année de publication : 2020 Article en page(s) : p. 1043-1052 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Air Butyrate d'acétate de cellulose Electrofilature Perméabilité Revêtements -- Séchage sous rayonnement ultraviolet Revêtements organiques Vapeur d'eau Index. décimale : 667.9 Revêtements et enduits Résumé : In this research, toluene diisocyanate-2-hydroxyethyl methacrylate (TDI-HEMA) adduct was used to modify the hydroxyl groups on cellulose acetate butyrate (CAB) structure. The obtained oligomer was characterized by Fourier transform infrared and proton nuclear magnetic resonance (1H NMR) spectroscopies, and gel permeation chromatography, respectively. Then, the UV-cured free films of the modified CAB oligomers were investigated in terms of thermal degradation, physicochemical, wettability, and mechanical properties. The chemical modification process was performed in various percentages; then, the contribution of the unreacted hydroxyl groups of CAB on the wettability, thermal degradation, and air/water vapor permeability properties were all investigated. The mechanical properties, thermal stability, and surface wettability character of pure CAB were improved with TDI-HEMA adduct modification. Electrospinning was used to obtain a fibrous layer in order to search the air/water vapor permeability properties. Modification of CAB caused decline in air/water vapor barrier character and thus enhanced the permeability properties. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of TDI-HEMA modified CAB oligomers - Electrospinning and UV-curing process - Characterization - RESULTS AND DISCUSSION : FTIR spectra - HNMR SPECTRA : GMC analysis - Thermal properties - Physicochemical properties - Contact angle measurement - Mechanical properties - Air/water vapor permeability - Microscopy images DOI : https://doi.org/10.1007/s11998-020-00330-7 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00330-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34391 [article]

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Preparation of hyperbranched polyester polyol-based urethane acrylates and applications on UV-curable wood coatings / Sümeyye Sabani in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 6 (11/2012)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 9, N° 6 (11/2012) . - p. 703-716 Titre : Preparation of hyperbranched polyester polyol-based urethane acrylates and applications on UV-curable wood coatings Type de document : texte imprimé Auteurs : Sümeyye Sabani, Auteur ; Aysen H. Önen, Auteur ; Atilla Güngör, Auteur Année de publication : 2012 Article en page(s) : p. 703-716 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bois -- Revêtements Polyesters Polymères ramifiés Polyols Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques Revêtements -- Séchage sous rayonnement ultraviolet Index. décimale : 667.9 Revêtements et enduits Résumé : In the present study, hyperbranched urethane acrylates (UA/HB-PEs) were synthesized by modifying the hydroxyl groups of hyperbranched polyester polyols (HB-PEs). The structure of oligomers were characterized by FTIR and 1H NMR spectroscopic techniques. Formulations containing UA/HB-PEs, reactive diluents, and photoinitiator were applied onto wood substrates and successfully polymerized under UV-irradiation. The coating performances and thermal properties of UV-cured films were evaluated. The studies on film characteristics reveal that the incorporation of UA/HB-PE afforded coatings with good adhesion and high gloss properties. It is observed that UV-cured coatings originated from [2,2-bis(4-?-hydroxyethoxy) phenyl propane] (HB-HEPA)- and [2,2-bis(4-?-hydroxyethoxy) phenyl 6F propane] (HB-HEPFA)-based oligomers possessed better surface and mechanical properties. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of [2,2-bis(4-?-hydroxyethoxy) phenyl propane] (HEPA and [2,2-bis(4-?-hydroxyethoxy) phenyl 6F propane] (HEFPA) - Synthesis of 1,4-cyclohexanedimethanol-based polyester polyol (PECHDM) - General procedure for the synthesis of HEPA-,HEPFA-, and CHDM-based hyperbranched polyester polyols - General procedure for the synthesis of hyperbranched urethane acrylates - Coating formulation and film preparation - Characterization - RESULTS AND DISCUSSION : Synthesis and characterization of hyperbranched polyesters polyols - Synthesis and characterization of hyperbranched urethane acrylates - Coating performances - Characterization of the free films DOI : 10.1007/s11998-012-9418-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9418-6.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16656 [article]

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Synthesis and characterization of UV-curable cellulose acetate butyrate-based oligomers and their cotton fabric coatings / Ozan Gazi Dehmen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 4 (07/2021)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 4 (07/2021) . - p. 1075–1085 Titre : Synthesis and characterization of UV-curable cellulose acetate butyrate-based oligomers and their cotton fabric coatings Type de document : texte imprimé Auteurs : Ozan Gazi Dehmen, Auteur ; Hacen Aysen Onen, Auteur ; Zehra Yildiz, Auteur ; Atilla Güngör, Auteur ; Yalcin Boztoprak, Auteur Année de publication : 2021 Article en page(s) : p. 1075–1085 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Brillance (optique) Butyrate d'acétate de cellulose Caractérisation Coton Le coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles). Enduction Essais (technologie) Huile de coton Oligomères Perméabilité Polymères -- Synthèse Résistance thermique Revêtements -- Propriétés mécaniques Revêtements organiques Textiles et tissus Index. décimale : 667.9 Revêtements et enduits Résumé : In order to improve the thermal stability and flexibility, cellulose acetate butyrate (CAB) was modified with toluene diisocyanate–hydroxyethyl methacrylate (TDI–HEMA) adduct in various molar ratios. The obtained oligomer was characterized by proton nuclear magnetic resonance (1H NMR) and Fourier transform infrared (FTIR) spectroscopies. Gloss, cross-hatch, contact angle, and Taber abrasion tests were all used to investigate the film forming performance of the modified CAB oligomers on glass plates. The UV-cured free films of the synthesized oligomers were examined in terms of the mechanical tests. By using the synthesized CAB oligomers, coating formulations were prepared and applied onto cotton fabrics in order to make the cotton fabrics more durable in outdoor environments. The existence of the coating layer on the fabric surfaces was investigated by scanning electron microscopy (SEM). The coated UV-cured fabrics were evaluated separately in terms of abrasion, thermal conductivity, and air and water vapor permeability properties. Results proved that the oligomer (50%-CAB) in which 50% of the hydroxyl groups of CAB were reacted with TDI–HEMA adduct showed the best mechanical properties with the highest tensile strength and modulus values. Considering the coated fabrics, the least deformation against abrasion, the highest air/water vapor permeability, and the best thermal conductivity were all recorded in 50%-CAB coated sample. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of modified CAB oligomers - Coating applications on cotton fabrics - Characterization - RESULTS AND DISCUSSION : FTIR spectra - Film forming properties on glass layers - Mechanical properties of free films - Table 1 : Sample codes with modification percentages - Table 2 : Gloss, cross-hatch, and contact angle test results of samples on glass plates - Table 3 : Mechanical properties of UV-cured free films of modified CAB oligomers - Table 4 : Abrasion test results of coated UV-cured cotton fabrics for each formulation - Table 5 : Clothing comfort properties of coated UV-cured cotton fabrics for each formulation DOI : https://doi.org/10.1007/s11998-020-00461-5 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00461-5.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36214 [article]

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