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Surface improvement on water and oil affinities and absorption rate of PVA/Tung oil-coated paperboard and fiberboard in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 2 (03/2016)
[article]
Titre : Surface improvement on water and oil affinities and absorption rate of PVA/Tung oil-coated paperboard and fiberboard Type de document : texte imprimé Année de publication : 2016 Article en page(s) : p. 345-354 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alcool polyvinylique
Analyse mécanique dynamique
Cartonnages
Catalyseurs
Fourier, Spectroscopie infrarouge à transformée de
Huile de tungL'huile de tung ou "huile de bois de Chin" ou encore "huile d'abrasin" est une huile de couleur jaune d'or, tirée des graines mûres d'un arbre de la famille des Aleurites (Aleurites moluccana - le noyer de bancoule - ou de Vernicia fordii selon les sources). Elle est employée notamment comme huile siccative en peinture ou comme traitement de surface du bois. (Wikipedia)
Matériaux -- Propriétés thermomécaniques
Oxydoréduction
Panneaux de fibres
Réticulation (polymérisation)
Revêtements
ThermiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : A novel coating material on paperboard and fiberboard from poly(vinyl alcohol) (PVA) modified with Tung oil was developed. The PVA/Tung oil coating was cured at several conditions: 25, 40, 50, and 60°C, in the presence of two types of catalysts, i.e., thermal catalyst using potassium persulfate (KPS) and redox catalyst using KPS and sodium thiosulfate. The chemical crosslinked structure of PVA/Tung oil-coating films was confirmed by FTIR. The result indicated the decrease in the double bonds of Tung oil by crosslinking reaction, especially at 60°C. In comparison with the same curing temperature, the films with redox catalyst showed more reduction in the number of double bonds of Tung oil. DMA results of the PVA/Tung oil-coating materials with redox catalyst showed the lowering of the heights of both β transition peak of Tung oil and α transition peak of PVA. FTIR and DMA results confirmed the more efficient crosslinking reaction of redox catalytic system than that of the thermal catalytic system. The water resistance and mechanical properties of these coating materials exhibited better values as projected to higher curing temperature and redox catalyst. SEM images showed the smooth surface of PVA/Tung oil covered on the paperboards with ~72 µm in thickness. The contact angle of water or oil drop and dynamic change in contact angle on the surfaces of PVA/Tung oil-coated paperboards and fiberboards were investigated. The results show the contact angles for both water and oil were lower than those of the uncoated ones, indicating the improvement of water and oil affinities of the PVA/Tung oil-coating materials. The dynamic changes in contact angle of the coated ones also decreased, suggesting the reduction in water and oil absorption rates of these coated substrates. Note de contenu : - EXPERIMENTAL : Materials - Preparation of PVA/tung oil sheet - Characterization of PVA/tung oil - Water resistance of PVA/tung oil - Mechanical thermal property of PVA/tung oil - Mechanical properties of PVA/tung oil - Preparation of coated paperboard or fiberboard - Characterization of paperboard and fiberboard - Sample identification
- RESULTS AND DISCUSSION : FTIR characterization - Water resistance of PVA/tung oil - Mechanical thermal property of PVA/tung oil - Mechanical properties of PVA/tung oil - Morphology of PVA/tung oil oil-coated boards - Contac angle measurementDOI : 10.1007/s11998-015-9750-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9750-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26119
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 2 (03/2016) . - p. 345-354[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17962 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and characterization of novel renewable castor oil-based UV-curable polyfunctional polyurethane acrylate / Yun Hu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 1 (01/2018)
[article]
Titre : Synthesis and characterization of novel renewable castor oil-based UV-curable polyfunctional polyurethane acrylate Type de document : texte imprimé Auteurs : Yun Hu, Auteur ; Chengguo Liu, Auteur ; Qianqian Shang ; Yonghong Zhou Année de publication : 2018 Article en page(s) : p. 77–85 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse mécanique dynamique
Angle de contact
Chromatographie sur gel
Copolymère uréthane acrylate
Copolymères -- Propriétés thermiques
Copolymères -- Synthèse
Fourier, Spectroscopie infrarouge à transformée de
Gonflement (physique)
Huile de ricin et constituants
Humidité -- Absorption:Eau -- Absorption
Hydrophobie
Rayonnement ultraviolet
Résonance magnétique nucléaire
Réticulation (polymérisation)Index. décimale : 667.9 Revêtements et enduits Résumé : In recent years, a lot of interest has been given to renewable resources for their environmental friendliness and potential biodegradability in the synthesis of urethane-derived polymers. In this work, UV-curable castor oil-based polyfunctional polyurethane acrylate (COPUA) was prepared by the reaction of isophorone diisocyanate (IPDI) with castor oil and pentaerythritol triacrylate (PETA). The structures and molecular weights of the targeted IPDI–PETA and COPUA were characterized by FTIR, 1H NMR, and GPC, respectively. In addition, the effect of reactive diluent content on damping properties, thermal stabilities, and mechanical properties of COPUA was characterized by dynamic mechanical analysis (DMA), thermogravimetric analysis (TGA), and universal test machine. DMA revealed the copolymers had a glass transition temperature (T g) from 31.81 to 48.09°C. TGA showed that thermal initial decomposition temperatures were above 344.5°C, indicating the copolymers had certain thermal stability. Finally, some physical properties of curing films were studied by the contact angle and water absorption, and the results showed that the coatings exhibited good hydrophobicity. The COPUA obtained from castor oil can be used as eco-friendly materials and other applications alternative to the use of other petrochemicals in coatings. Note de contenu : - EXPERIMENTAL : Materials - Preparation - Determination of NCO content 24 - Characterization
- RESULTS AND DISCUSSION : FTIR analysis - 1H-NMR analysis - GPC analysis - DMA characterization - Thermal properties - Contact angle characterization - Mechanical properties of the COPUA - Swelling measurement of the COPUA - Photocuring kinetics by real-time infrared spectroscopy (RT-IR)DOI : 10.1007/s11998-017-9948-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9948-z.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30069
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 1 (01/2018) . - p. 77–85[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19610 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and characterization of UV-curing epoxy acrylate coatings modified with organically modified rectorite / Ying Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 1 (01/2017)
[article]
Titre : Synthesis and characterization of UV-curing epoxy acrylate coatings modified with organically modified rectorite Type de document : texte imprimé Auteurs : Ying Wang, Auteur ; Zhichao Cao, Auteur ; Fengguo Liu, Auteur ; Xiangxin Xue, Auteur Année de publication : 2017 Article en page(s) : p. 107-115 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse mécanique dynamique
Copolymère époxy acrylate
Matériaux hybrides -- Propriétés mécaniques
Morphologie (matériaux)
RectoriteLa Rectorite (ou "papier de montagne" ou "allevardite") est un minéral des argiles.
C’est un monoclinique constitué d’une interstratification régulière de deux phyllosilicates : le mica et la smectite
Formule chimique : (Na,Ca)Al4(Si,Al)8O20(OH)4 • 2 H2O
Revêtements -- Séchage sous rayonnement ultraviolet:Peinture -- Séchage sous rayonnement ultraviolet
ThermogravimétrieIndex. décimale : 667.9 Revêtements et enduits Résumé : Epoxy acrylate (EA) coatings modified with organically modified rectorite (OREC) were synthesized employing the ultraviolet-curing technique. Two kinds of alkyl ammonium ions, octadecyltrimethylammonium chloride (OTAC) and [2-(methacryloyloxy)ethyl]trimethylammonium chloride (MAOTMA), were used to modify rectorite (REC). The methacrylate functionalities of MAOTMA were capable of reacting with the acrylate groups of EA. The structure of OREC was characterized by FTIR and XRD and the results indicated that the surfactants were successfully intercalated into the REC interlayers via cation exchange process. The morphology of nanocomposites was investigated by SEM and TEM. OREC showed better dispersion in EA matrix compared with unmodified REC. The Tg of neat EA obtained by DMA was 75.6°C, while for 5 wt% EA/MAOTMA-REC and EA/OTAC-REC nanocomposites it increased to 76.5 and 80.8°C, respectively. The nanocomposite with 3 wt% loading of OTAC-REC had the highest Tg (89.7°C). TGA revealed that the thermal stability of nanocomposites was enhanced by OTAC-REC and MAOTMA-REC and the thermal stability of EA/MAOTMA-REC nanocomposites was better than that of EA/OTAC-REC nanocomposites. The mechanical properties of nanocomposites containing OTAC-REC and MAOTMA-REC were better than those of nanocomposites containing unmodified REC. With increasing OREC content, the adhesive force of nanocomposites decreased slightly and the flexibility increased significantly. Note de contenu : - EXPERIMENTAL : Materials - Clay modification - Preparation of nanocomposite coatings - Characterizations
- RESULTS AND DISCUSSION : Modification of the rectorite - Morphological analysis - Dynamic mechanical analysis (DMA) - Thermal gravimetric analysis (TGA) - Mechanical propertiesDOI : 10.1007/s11998-016-9832-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9832-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27793
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 1 (01/2017) . - p. 107-115[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18674 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and mechanical properties of polyacrylic acid resin retanning agent / Zou Xianglong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 3 (05-06/2014)
[article]
Titre : Synthesis and mechanical properties of polyacrylic acid resin retanning agent Type de document : texte imprimé Auteurs : Zou Xianglong, Auteur ; Lan Yunjun, Auteur ; Zhang Qinghua, Auteur ; Zhan Xiaoli, Auteur Année de publication : 2014 Article en page(s) : p. 127-130 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acide polyacrylique
Analyse mécanique dynamique
Caractérisation
Humidité -- Absorption
Polymères -- Synthèse
RetannageIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Polyacrylic acid retanning agent (PAA), PAA-1 and PAA-2 with weight average molecular weights (Mw) of 14.4 x 103 and 23.1 x 103g/mol respectively, were prepared by water solution homopolymerization of acrylic acid monomer. The effects of molecular weight and moisture absorbency on glass transition temperature (T) and mechanical properties of PAA were investigated. The results showed that PAA-1 and PAA-2 have similar capacity for moisture absorbency, namely about 14.5% at 20°C(T=20°C) and 65% relative humidity (RH=65%). After equilibrating for 48 hours at T=20°C, RH=65%, the T of PAA-1 and PAA-2 fell from 86.17°C and 90.71°C to -11.44°C and -3.09°C respectively. Dynamic mechanical analysis (DMA) showed the storage moduli of PAA-1 and PAA-2 were significantly decreased at -26.99°C and -8.78°C respectively, the storage modulus of PAA-2 was higher than that of PAA-1 due to its higher molecular weight. Note de contenu : - MATERIALS AND METHODS : Materials - Synthesis of PAA - Experimental procedure and characterization
- RESULTS AND DISCUSSION : FT-IR analysis - Moisture absorption of PAA - DMAEn ligne : https://drive.google.com/file/d/1o6rYJ3cgN9-nNdNj-T2EIrXpE4U7QbBG/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21533
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Code-barres Cote Support Localisation Section Disponibilité 16323 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and properties of phosphorus-containing cardanol-based acrylates for flame-retardant UV/EB-cured coatings in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 5 (09/2021)
[article]
Titre : Synthesis and properties of phosphorus-containing cardanol-based acrylates for flame-retardant UV/EB-cured coatings Type de document : texte imprimé Année de publication : 2021 Article en page(s) : p. 1353-1364 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse mécanique dynamique
Caractérisation
Cardanol
IgnifugeantsComposé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface.
Oligomères
Polymères -- Synthèse
Revêtements -- Propriétés thermiques
Revêtements organiques
Stabilité thermiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : In this article, two kinds of phosphorus-containing cardanol-based acrylates were designed and synthesized. Firstly, a pre-polymer (PT-HCE) with three arms was synthesized using hydroxyethyl cardanol ether (HCE) and phosphorus oxychloride (POCl3) as raw materials. Then, the PT-HCE was acrylated to synthesize phosphate tris-hydroxyethyl cardanol epoxy acrylate resin (AEPT-HCE) and phosphate tris-hydroxyethyl cardanol photosensitive resin (APT-HCE). The structures of PT-HCE, AEPT-HCE and APT-HCE were characterized and the results showed that the photosensitive resins were successfully synthesized. In addition, AEPT-HCE and APT-HCE were used to prepare the flame-retardant UV/EB curing coatings. The properties of the coatings were tested, and the results revealed that different structures have a certain effect on Tg and tensile properties of the coatings. The cured films demonstrated excellent flame-retardant properties, showing flammability rating of V-0 in UL-94 test. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of phosphorus-containing cardanol-based oligomer - Synthesis of phosphate tris-hydroxyethyl cardanol epoxy acrylate resin - Synthesis of phosphate tris-hydroxyethyl cardanol acrylate resin - Preparation of UV/EB-cured coatings - Characterization
- RESULTS AND DISCUSSION : Structure characterization of cardanol-based resin - Double bond conversion ratio of coatings - Analysis of curing and conversion rate - Thermal stability of the coatings - Dynamic thermomechanical analysis of UV/EB-cured films - Properties of the UV/EB-cured coatings - Stress–strain curves of cured films - Flame retardancy of the cured films
- Table 1 Thermal properties of UV/EB-cured coatings
- Table 2 The properties of UV/EB-cured coatings
- Table 3 Refer to American society for testing and materials standard ASTM D3801-10DOI : https://doi.org/10.1007/s11998-021-00500-1 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00500-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36438
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