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Preparation of amphiphilic acrylate copolymer containing active epoxy group and its fatliquoring : Effect on aldehyde-tanned leather / Huang Yingying in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 3 (05-06/2023)
[article]
Titre : Preparation of amphiphilic acrylate copolymer containing active epoxy group and its fatliquoring : Effect on aldehyde-tanned leather Type de document : texte imprimé Auteurs : Huang Yingying, Auteur ; Jinxia Du, Auteur ; Xu Zhang, Auteur ; Biyu Peng, Auteur ; Chunxiao Zhang, Auteur Année de publication : 2023 Article en page(s) : p. 93-97 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation
Copolymère ester acrylique
Copolymères -- Synthèse
Croûte (cuir)On entend par "cuir en croûte" des cuirs ayant subi les opérations jusqu'au tannage, à l'exclusion de toute opération de corroyage ou de finissage, mais qui, par opposition aux wet-blue ont été séchés.
Epoxydes
Glutaraldéhyde
Huiles et graisses
Polymères amphiphiles
Polymérisation en émulsion
Produits de nourriture du cuir
Résistance à la déchirure
Tannage chrome free
Tannage organiqueIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Acrylic-acrylic long-chain ester amphiphilic copolymers are a class of leather retanning and fatliquoring materials with superior properties. However, these types of copolymers lack reactive groups and possess weak binding ability to organically-tanned leather. In this paper, a terpolymer Poly(AA-LA-GMA) containing reactive epoxy groups was prepared by emulsion copolymerisation of acrylic acid (AA), dodecyl acrylate (LA) and glycidyl methacrylate (GMA) monomers. The effect of the GMA content on its binding ability to leather fibres and its fatliquoring properties was investigated. The results showed that the introduction of the epoxy group can significantly improve the combination of copolymer with glutaraldehyde-tanned leather. When the content of GMA monomer reached 10% of the total monomer amount (mol), the dichloromethane extraction rate and fogging value of the fatliquored leather were reduced by about 34% and 53%, respectively. And the excellent binding ability improved the softness and tear strength of the fatliquored leather. Note de contenu : - INTRODUCTION : Materials - Synthesis of epoxy-modified amphiphilic copolymers - Determination of the content of the residual monomer - Fourier Transform Infrared spectroscopy (FTIR) - Application of Poly(AA-LA-GMA) in the fatliquoring process - Determination of the absorption rate of fatliquor - Determination of softness and tear strength of crust leather - Determination of dichloromethane extraction rate - Determination of fogging value
- RESULTS AND DISCUSSION : Preparation and characterisation of Poly(AA-LAGMA) - Fatliquoring effects of Poly(AA-LA-GMA) on chrome-tanned leather - Fatliquoring effect of Poly(AA-LA-GMA) to glutaraldehyde-tanned leather - Action mechanism between epoxy-modified amphiphilic copolymer and leather
- Table 1 : Fatliquoring effects of amphiphilic copolymers to chrome-tanned leather
- Table 2 : Fatliquoring effects of amphiphilic copolymers to glutaraldehyde-tanned leather
- Fig. 1 : Schematic of the copolymerisation reaction
- Fig. 2 : Action mechanism between epoxy-modified amphiphilic copolymer and leatherEn ligne : https://drive.google.com/file/d/1KByCAQkl2D1o3TmoIgqbuA3ZMjFh8hZt/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39579
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 107, N° 3 (05-06/2023) . - p. 93-97[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24110 - Périodique Bibliothèque principale Documentaires Disponible Preparation of high-performance epoxy soybean oil-based UV-curable oligomers and coatings / Yumei Zhou in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 6 (11/2023)
[article]
Titre : Preparation of high-performance epoxy soybean oil-based UV-curable oligomers and coatings Type de document : texte imprimé Auteurs : Yumei Zhou, Auteur ; Linxi Feng, Auteur ; Jinqing Qu, Auteur Année de publication : 2023 Article en page(s) : p. 1923-1933 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse structurale (ingénierie)
Copolymère époxy acrylique
Copolymères -- Synthèse
Huile de soja
Oligomères
Revêtements -- Propriétés mécaniques
Revêtements -- Propriétés thermiques
Revêtements -- Séchage sous rayonnement ultraviolet
Revêtements organiques
Traction (mécanique)Index. décimale : 667.9 Revêtements et enduits Résumé : Ultraviolet (UV)-curable coatings made from acrylated epoxy soybean oil (AESO) combine the advantages of renewable biobased resources and energy-efficient UV-curable materials, so they serve as the primary research objects for developing eco-friendly coatings. However, due to the lack of rigid structure, the hardness and thermal stability of AESO are much lower than those of petroleum-based epoxy acrylate (EA). Therefore, high-performance soybean oil-based UV-curable oligomers were prepared by using dimethylolpropionic acid (DMPA) and methacrylic anhydride (MAAH) to modify ESO and then blended with high-functional active diluent trimethylolpropane triacrylate (TMPTA). Furthermore, FTIR, 1H NMR, and GPC were used to analyze the molecular structure and molecular weight of the oligomers. The oligomers (DMA/MAAESO and DMA/MAAESO-TM) had high esterification rate, curing degree, and good storage stability. The cured coatings from DMA/MAAESO and DMA/MAAESO-TM oligomers had significantly improved thermal stability, tensile, and coating properties. In all samples, DMA/MAAESO-TM cured coating had excellent coating performances. The glass transition temperature (Tg) of DMA/MAAESO-TM was 78.1°C, and its crosslink density (νe) was 6.87 × 10−3 mol/cm3. The hardness, curing time, gloss, flexibility, and impact resistance were H, 20 s, 108.5, 1 mm, and 50 cm, respectively. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of acrylate epoxy soybean oil (AESO) - Synthesis of DMA/MAA - Synthesis of DMA/MAAESO - Preparation of AESO and DMA/MAAESO coatings - Characterization
- RESULTS AND DISCUSSION : Synthesis of DMA/MAA and DMA/MAAESO - Structural analysis of AESO and DMA/MAAESO -
GPC of AESO and DMA/MAAESO - Physical properties of UV-curable oligomers - Dynamic mechanical analysis of UV-curable coatings - Thermogravimetric analysis of UV-curable coatings - Tensile properties of UV-curable coatings - Coating film properties
- Table 1 : Physical properties of oligomers
- Table 2 : Dynamic mechanical properties of UV-curable coatings
- Table 3 : Thermal properties of UV-curable coatings
- Table 4 : Tensile properties of UV-curable coatings
- Table 5 : Coating film propertiesTable 6 Comparison of the DMA/MAAESO-TM with other samples in the literatureDOI : https://doi.org/10.1007/s11998-023-00787-2 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00787-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40171
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 6 (11/2023) . - p. 1923-1933[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24337 - Périodique Bibliothèque principale Documentaires Disponible Preparation of low viscosity and high flexibility epoxy acrylate and its application in UV-curable coatings / Yumei Zhou in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
[article]
Titre : Preparation of low viscosity and high flexibility epoxy acrylate and its application in UV-curable coatings Type de document : texte imprimé Auteurs : Yumei Zhou, Auteur ; Jinqing Qu, Auteur Année de publication : 2024 Article en page(s) : p. 601-610 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Copolymère époxy acrylique
Copolymères -- Synthèse
Oligomères
Revêtements -- Propriétés mécaniques
Revêtements -- Séchage sous rayonnement ultraviolet
Souplesse (mécanique)
Thermodurcissables
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : Epoxy acrylate (EA) is currently the most widely used UV-curable oligomer due to its short curing time, high coating hardness, excellent mechanical property, and thermal stability. To address the problems of high brittleness, poor flexibility, and high viscosity of EA, the UV-curable epoxy acrylate oligomer with low viscosity and high flexibility was prepared and applied to UV-curable coatings. The carboxyl terminated intermediate obtained by the reaction of anhydride and diol was used to modify EA to improve the flexibility of cured film, and the flexibility was adjusted through the length of the carbon chain of diols. The resin viscosity was reduced by partially replacing E51 with binary glycidyl ether. Compared with unmodified EA, the viscosity of the resin prepared in this study decreases from 29800 to 13920 mPa s (25°C), and the flexibility of the cured film increases from 12 to 1 mm. Compared with commercially available modified EA, the raw materials used in this study are low cost and easy to obtain with a reaction temperature below 130°C, using a simple synthesis process, and no organic solvents. Note de contenu : - EXPERIMENT : Raw materials - Synthesis of EA - Synthesis of MHEA - Preparation of UV-cured film - Characterization - Acid value (A v) - Viscosity (V s) - Fourier transform infrared spectroscopy (FTIR) - 1H nuclear magnetic resonance (1H NMR) - Gel permeation chromatography (GPC) - Gel rate of curing film (C gel) - Thermogravimetric analysis (TGA) - Tensile properties testing - Curing time testing - Coating film properties testing
- RESULTS AND DISCUSSION : Determination of reaction conditions - Determination of the type of diols - Determination of the type of acid anhydrides - Determination of BDDGE addition amount - Structural analysis of MHEA - Curing process of UV-curable coatings - Thermogravimetric analysis of the cured films - Tensile properties of the cured films - UV-curable coating properties
- Table 1 : Effect of kinds of diols on properties of the resin and cured film
- Table 2 : Effect of kinds of anhydrides on properties of the resin and cured film
- Table 3 : Effect of BDDGE addition on the properties of the resin and cured film
- Table 4 : GPC results of E51 and MHEA
- Table 5 : TG results of cured film prepared by EA and MHEA
- Table 6 : Tensile properties of the EA and MHEA cured films
- Table 7 : Comparison of cured film propertiesDOI : https://doi.org/10.1007/s11998-023-00842-y En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00842-y.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40780
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 2 (03/2024) . - p. 601-610[article]Relations procédé de synthèse - Structure - Filmabilité dans des copolymères acrylonitrile/acrylate de n-butyle et de 2-éthyl-hexyle en émulsion / Bruno Rocchetti / 1983
Titre : Relations procédé de synthèse - Structure - Filmabilité dans des copolymères acrylonitrile/acrylate de n-butyle et de 2-éthyl-hexyle en émulsion Type de document : texte imprimé Auteurs : Bruno Rocchetti, Auteur ; Georges Vallet, Directeur de thèse ; Université Claude Bernard (Lyon), Organisme de soutenance Année de publication : 1983 Importance : 169 p. Présentation : ill. Format : 30 cm Note générale : Thèse de chimie des polymères - Bibliogr. Langues : Français (fre) Catégories : Copolymères -- Synthèse
Copolymères en émulsion
Couches minces
Polymérisation en émulsion
Thèses et écrits académiquesIndex. décimale : 668.9 Polymères Note de contenu : - PARTIE PRELIMINAIRE : I. Partie expérimentale - II. Les monomères et leur réactivité - III. Emulsification, solubilisation, stabilisation
- COPOLYMERISATIONS AN/AB ET AN/AEH : IV. Copolymérisation AN/AB et AN/AEH en réacteur fermé / V. Semi-continu : Copolymérisations semi-continues AN/AB et AN/AEH à bas taux de monomères initial (addition M) - Copolymérisations semi-continues AN/AB et AN/AEH à haut taux de monomères initial (addition E)
- FILMABILITEThèse : Thèse - Université Claude Bernard - Lyon 1 : 1983 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=1054 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 0919 TH/1983/ROC Thèse, mémoire, etc... Bibliothèque principale Documentaires Disponible A self-assembled, silicone acrylate coating formulation and detection of the optically non-uniform structure with reflectance spectroscopy / Kohei Masuda in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 4 (07/2019)
[article]
Titre : A self-assembled, silicone acrylate coating formulation and detection of the optically non-uniform structure with reflectance spectroscopy Type de document : texte imprimé Auteurs : Kohei Masuda, Auteur ; Kazuhiro Tsuchida, Auteur ; Tomohiro Inoue, Auteur ; Mary Gilliam, Auteur Année de publication : 2019 Article en page(s) : p. 923-931 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Copolymère silicone acrylate
Copolymères -- Synthèse
Essais accélérés (technologie)
Formulation (Génie chimique)
Polycarbonates
Revêtements -- Séchage sous rayonnement ultraviolet
Revêtements organiques
Systèmes auto-assemblés
VitrageIndex. décimale : 667.9 Revêtements et enduits Résumé : A newly synthesized, single-step silicone acrylate formulation cured by conventional radiation produced a reflection spectrum that showed an unusual interference pattern for a single-step coating. The acrylate was prepared by transesterification of silicate oligomer with ω-functionalized acrylic alcohol. The reflectance spectrum was analyzed by means of the Fourier transformation, followed by a separation of variables and constrained conditions. The separation of variables was based on the refractive index as a function of the layer depth, which revealed the coating was non-uniform in refractive index. An interface within the coating was independently observed by microscopy, showing that the coating separated into two layers, supporting the numerical analysis. Although the coating was manufactured by a single-step coating process, the two-layer structure that was formed is normally constructed with multiple coating processes, such as applications of a primer and a top coat. Experiments varying the formulation components show that the new silicone acrylate and an aliphatic di-functional acrylic ester were essential components for the formation of the two-layer structure. Outdoor weathering results are presented after 1 year of testing in Florida and Arizona, which showed better performance than conventional coating systems. Note de contenu : - EXPERIMENTAL : Synthesis - Preparation of radiation-curable formulations and coated plaques - Sample analysis - Weathering test
- RESULTS AND DISCUSSION : Reflection spectra - Numerical analysis - Finding chemica factors - Microscopic anlaysis - Weathering testDOI : 10.1007/s11998-018-00171-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-00171-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32850
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