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Effect of siloxane chain length on thermal, mechanical, and chemical characteristics of UV (ultraviolet)-curable epoxy acrylate coatings in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 2 (03/2022)
[article]
Titre : Effect of siloxane chain length on thermal, mechanical, and chemical characteristics of UV (ultraviolet)-curable epoxy acrylate coatings Type de document : texte imprimé Année de publication : 2022 Article en page(s) : p. 439-451 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Copolymère époxy acrylate
Formulation (Génie chimique)
Résistance chimique
Revêtements -- Propriétés mécaniques
Revêtements -- Séchage sous rayonnement ultraviolet
Revêtements organiques
SiloxanesLes siloxanes sont une classe de composés du silicium dont la formule empirique est R2SiO, où R est un groupe radical qui peut être organique. Des exemples représentatifs sont [SiO(CH3)2]n (diméthylsiloxane) et [SiO(C6H5)2]n (diphénylsiloxane), où n est typiquement supérieur à 4. Ces composés peuvent être des hybrides organiques et inorganiques. Les chaînes organiques confèrent au composé des propriétés hydrophobes alors que la chaîne principale -Si-O-Si-O- est purement inorganique.
Le mot siloxane est dérivé de Silicium, Oxygène et alkane.
Des siloxanes peuvent être trouvés dans des produits tels que des cosmétiques, des déodorants, des enduits hydrophobes pour pare-brise, des peintures et certains savons.
Les siloxanes polymérisés (polysiloxanes) sont appelés silicones1,2.
Le siloxane est massivement utilisé dans l'industrie cosmétique (rouges à lèvre, conditionneurs et shampooings, déodorants, etc.).
Une application récente du Siloxane D5 (2001) a été trouvée dans le nettoyage à sec des textiles en remplacement du perchloroéthylène. Ce procédé est très répandu aux États-Unis et au Royaume-Uni. Il devient de plus en plus courant en Europe continentale dont la France, afin de promouvoir l'usage de procédés écologiques et respectueux de la santé humaine.Index. décimale : 667.9 Revêtements et enduits Résumé : In this research, high-performance epoxy acrylate (EA) coating formulations that contain various acrylate-modified diepoxy siloxane (DESA) intermediates were synthesized and characterized. Firstly, diepoxy siloxane (DES) intermediates, which have varying chain lengths (Mw = 370–3300 Da), were modified by acrylic acid via the ring-opening reaction oxirane group. DESA intermediates were then used in the preparation of ultraviolet (UV)-curable EA formulations. EA was also synthesized via acrylic acid modification of a commercial bisphenol-A-based epoxy resin, used as the standard formulation. EA-based UV-curable formulas were applied on substrates and then cured by UV irradiation for investigating the coating performances. Subsequently, performances of the UV-cured coatings were evaluated by the various test techniques, such as hardness, gloss, cross-cut adhesion force scratch resistance, contact angle, yellowing resistance, abrasion resistance, chemical resistance, and color measurement. The effect of DESA variety on the formations was examined compared to both themselves and the standard formulation. The results showed that the varying amounts and chain lengths of DESA influenced UV-curable coatings’ properties; particularly, the scratch resistance, contact angle, and yellowing resistance significantly enhanced with the increasing chain length of DESA. High-performance UV-curable EA formulations could be produced with the scratch resistance of 4 N, the contact angle of 95°, and high yellowing resistance (ΔE = 0.35). Note de contenu : - EXPERIMENTAL : Materials - Characterization and instruments - Preparation of epoxy acrylate (EA) and diepoxy siloxane acrylate intermediates (DESA) - Preparation of coating formulations and films - Film properties
- RESULTS AND DISCUSSION : Synthesis and characterization - Physical and mechanical properties - Thermal performance analysis
- Table 1 Formulations of different compositions of UV-curable coatings
- Table 2 Formulations of DESA-based UV-curable coatings
- Table 3 Specific properties of diepoxy polysiloxane-based intermediates
- Table 4 Color of intermediate products
- Table 5 Physical and mechanical properties of UV-cured epoxy acrylate films
- Table 6 Physical and mechanical properties of DESA films
- Table 7 The contact angle values of UV-cured films
- Table 8 Chemical resistance of UV-cured filmsDOI : https://doi.org/10.1007/s11998-021-00548-z En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00548-z.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37276
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Code-barres Cote Support Localisation Section Disponibilité 23408 - Périodique Bibliothèque principale Documentaires Disponible Effect of siloxane functionalized caprolactone polyols on photocurable epoxy coatings / Shoabing Wu in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 70, N° 887 (12/1998)
[article]
Titre : Effect of siloxane functionalized caprolactone polyols on photocurable epoxy coatings Type de document : texte imprimé Auteurs : Shoabing Wu, Auteur ; Mark D. Soucek, Auteur Année de publication : 1998 Article en page(s) : p. 53-62 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Couches minces
Dureté (matériaux)
Epoxydes
Formulation (Génie chimique)
Frottements (mécanique)
Poly-e-caprolactone
Résistance au chocs
Réticulation (polymérisation)
Revêtements
Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques
SiloxanesLes siloxanes sont une classe de composés du silicium dont la formule empirique est R2SiO, où R est un groupe radical qui peut être organique. Des exemples représentatifs sont [SiO(CH3)2]n (diméthylsiloxane) et [SiO(C6H5)2]n (diphénylsiloxane), où n est typiquement supérieur à 4. Ces composés peuvent être des hybrides organiques et inorganiques. Les chaînes organiques confèrent au composé des propriétés hydrophobes alors que la chaîne principale -Si-O-Si-O- est purement inorganique.
Le mot siloxane est dérivé de Silicium, Oxygène et alkane.
Des siloxanes peuvent être trouvés dans des produits tels que des cosmétiques, des déodorants, des enduits hydrophobes pour pare-brise, des peintures et certains savons.
Les siloxanes polymérisés (polysiloxanes) sont appelés silicones1,2.
Le siloxane est massivement utilisé dans l'industrie cosmétique (rouges à lèvre, conditionneurs et shampooings, déodorants, etc.).
Une application récente du Siloxane D5 (2001) a été trouvée dans le nettoyage à sec des textiles en remplacement du perchloroéthylène. Ce procédé est très répandu aux États-Unis et au Royaume-Uni. Il devient de plus en plus courant en Europe continentale dont la France, afin de promouvoir l'usage de procédés écologiques et respectueux de la santé humaine.Index. décimale : 667.9 Revêtements et enduits Résumé : Cationic ultraviolet (UV) coatings were formulated using a cycloaliphatic diepoxide (3,4-epoxycyclohexyl methyl-3',4'-epoxycyclohexane carboxylate) with siloxane modified caprolactone polyols. Both di- and tri-TEOS (tetraethyl orthosilicate) functionalized caprolactone polyols were used to modify the UV coatings. The resulting coatings were cured and evaluated in terms of pencil hardness, MEK double rubs, crosshatch/pull-off adhesion, and reverse impact resistance. Addition of the siloxane-functionalized polyols into the caprolactone polyol/cycloaliphatic diepoxide coating formulations improved pencil hardness, MEK double rubs, and enhanced toughness of the coatings. When the addition of siloxane-functionalized polyols was less than 25 wt%, the resulting coatings had significantly increased adhesion. In addition, modification of the coatings with the siloxane-functionalize polyols also reduced surface tension and improved film formation with reduced levels ofsurface wetting agent. Without the modification, the coatings exhibited a poor balance of hardness and adhesion. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18055
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Code-barres Cote Support Localisation Section Disponibilité 003556 - Périodique Bibliothèque principale Documentaires Disponible Effect of solvents on the curing and properties of fully bio-based thermosets for coatings / Songqi Ma in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 2 (03/2017)
[article]
Titre : Effect of solvents on the curing and properties of fully bio-based thermosets for coatings Type de document : texte imprimé Auteurs : Songqi Ma, Auteur ; Curtiss S. Kovash, Auteur ; Dean C. Webster, Auteur Année de publication : 2017 Article en page(s) : p. 367-375 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse thermique
Biomatériaux
Epoxydation
Ressources renouvelables
Réticulants
Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques
Revêtements -- Propriétés thermiques:Peinture -- Propriétés thermiques
solvants
ThermodurcissablesIndex. décimale : 667.9 Revêtements et enduits Résumé : With the increasing concern about the depletion of fossil reserves and greenhouse gas emissions, it is desired to replace coatings which are made using petrochemical-based materials with renewable alternatives such as bio-based polymers. In this paper, fully bio-based thermosets for coatings were prepared from epoxidized sucrose soyate derived from sucrose and soybean oil fatty acid along with citric and malic acids found naturally in juices with the assistance of different solvents. The solvents with reasonable boiling point and good miscibility with citric acid and malic acid, such as water, ethanol, 1-propanol, 2-propanol, and 1,4-dioxane, were screened and used to investigate their effects on the curing and properties of the fully bio-based thermosets. The curing reactivity was studied by examining the gel time and nonisothermal curing process with DSC. The thermal and mechanical properties as well as coating performance properties were also investigated. Note de contenu : - EXPERIMENTAL : Materials - Screening solvents - Preparation of crosslinked networks - Characterization
- RESULTS AND DISCUSSION : Solvents effects on the reactivity of citric acid/ESS systems - Gel content of the cured samples - Thermal and mechanical properties of the cured samples - Thermal degradation of the cured samples - Coating properties of the cured samplesDOI : 10.1007/s11998-016-9863-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9863-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28152
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Code-barres Cote Support Localisation Section Disponibilité 18781 - Périodique Bibliothèque principale Documentaires Disponible Effect of the particle sizes of silica on the properties of UV-curing matting coatings / Ziyuan Yang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 1 (01/2021)
[article]
Titre : Effect of the particle sizes of silica on the properties of UV-curing matting coatings Type de document : texte imprimé Auteurs : Ziyuan Yang, Auteur ; Guozhang Ma, Auteur ; Caiying Hou, Auteur ; Yanxia Niu, Auteur ; Huafeng Duan, Auteur ; Xiaogang Hao, Auteur Année de publication : 2021 Article en page(s) : p. 183-192 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agent mattant
Analyse morphologique
Caractérisation
Copolymère uréthane acrylate
Diisocyanate d'isophorone
Dioxyde de silicium
Oligomères
Polyméthacrylate d'hydroxyéthyle
Polypropylène glycol
Revêtements -- Propriétés mécaniques
Revêtements -- Séchage sous rayonnement ultraviolet
Revêtements organiques
SiliceLa silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux.
La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...).
Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale.
Stabilité thermique
Taille des particulesIndex. décimale : 667.9 Revêtements et enduits Résumé : UV-curable matting composites were prepared by micron silica matting agent, polyether diol (PPG), isophorone diisocyanate (IPDI), and 2-hydroxyethyl methacrylate (HEMA) via the in situ polymerization method. The structure, surface morphology, and thermal stability of the composites were characterized by FTIR, SEM, and TGA, respectively. As the main resin in the UV-curable coating, the effects of particle sizes of silica on the gloss, abrasion resistance, adhesion, and hydrophilic properties of coatings were measured. The results show that the agglomeration phenomenon of the modified silica in the composite coating was obviously improved. The smaller the particle size, the lower the gloss of coatings with the same content. The adhesion strength and abrasion resistance of the composites were superior to those of pure UV-curing coatings without silica. The greater the particle sizes of the added modified silica, the stronger the hydrophilicity of the composite. Note de contenu : - EXPERIMENTAL : Material - Preparation of PUA and PUA/Sio2 oligomer - Preparation of UV-curing matting coating with PUA/Sio2 oligomer - Instrument and characterization
- RESULTS AND DISCUSSION : The structure UV-PUA/Sio2 oligomer - The thermal stability of UV-PUA/SiO2 composite films - Effect of particle size of silica on the surface property of UV-cured films - Effec of particle size of silica on the mechanical property of UV-cured filmsDOI : https://doi.org/10.1007/s11998-020-00395-4 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00395-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35362
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Code-barres Cote Support Localisation Section Disponibilité 22605 - Périodique Bibliothèque principale Documentaires Disponible Effect of three structurally different epoxy resins on fire resistance, optical transparency, and physicomechanical properties of intumescent fire-retardant transparent coatings / Raj Shree in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 2 (03/2021)
[article]
Titre : Effect of three structurally different epoxy resins on fire resistance, optical transparency, and physicomechanical properties of intumescent fire-retardant transparent coatings Type de document : texte imprimé Auteurs : Raj Shree, Auteur ; R. Baloji Naik, Auteur ; Rupesh S. Naik, Auteur ; G. Gunasekaran, Auteur Année de publication : 2021 Article en page(s) : p. 535–547 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Charbon, Cendres de
Composés organiques -- Synthèse
Epoxydes
Essais de comportement au feu
Fourier, Spectroscopie infrarouge à transformée de
Gommes et résines
IgnifugeantsComposé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface.
Intumescence (chimie)
Phosphates
Polyphosphorique, Acide
Revêtements -- Propriétés mécaniques
Revêtements -- Propriétés physiques
Revêtements organiques
Transparence (optique)Index. décimale : 667.9 Revêtements et enduits Résumé : Transparent intumescent fire-retardant (IFR) coatings are the newest passive fireproofing materials which maintain structural integrity without losing aesthetic appearance of the substrate. In this present paper, effects of three IFR coatings with structurally different epoxy resins, namely aliphatic, cycloaliphatic, and aromatic, on the fire resistance, transparency, and physicomechanical properties were investigated. Different phosphate resin acids (PRA) were prepared by reacting synthesized phosphate ester acid (PEA) with aliphatic, cycloaliphatic, and aromatic epoxy resins. The chemical structures of the above PEA and PRAs were confirmed by Fourier transform infrared spectroscopy (FTIR), 1H-nuclear magnetic resonance spectroscopy (1H-NMR), and 31P-nuclear magnetic resonance spectroscopy (31P-NMR). Subsequently, transparent IFR coatings were prepared by mixing these PRAs with hexamethoxy methyl melamine resin. Transparency of the coatings was confirmed by UV–Vis–NIR spectrophotometeric studies. Fire protection property and char compressive strength were done to investigate the fire protection ability of the coatings, and the quality of the char formed was analyzed by field emission scanning electron microscope. The decomposition process of prepared fire-retardant coatings was studied by thermogravimetric analysis. Results showed that aliphatic epoxy-based transparent coating produced tough and compact char, but the char height was negligible, and aromatic epoxy-based transparent coating produced soft and fluffy char having excellent char height; however, the fluffy char reduced protection for longer duration. Cycloaliphatic epoxy-based transparent coating produced tough and compact char with good char height, thereby reducing heat transfer during combustion, and also showed superior scratch, abrasion, impact, and water resistance compared to other compositions. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of phosphate resin acid (PRA) - Preparation of coating sample
- CHARACTERIZATION : Characterization of prepared resins - Characterization of transparent coatings - Characterization of char formed
- RESULTS AND DISCUSSION : Thermogravimetric analysis (TGA) - Transparency of coating prepared using PRAs - Physicomechanical properties of transparent IR coatings - Fire resistant test - Characterization of char
- Table 1 : Composition and acid value of prepared resins
- Table 2 : Physicomechanical performance of all PRAs
- Table 3 : Elemental composition of char obtained from the EDAX analysisDOI : https://doi.org/10.1007/s11998-020-00422-4 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00422-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35613
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