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Development of functionalized SiO2–TiO2 reinforced cardanol and caprolactam modified diamine based polybenzoxazine nanocomposites for high performance applications in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 6 (11/2019)
[article]
Titre : Development of functionalized SiO2–TiO2 reinforced cardanol and caprolactam modified diamine based polybenzoxazine nanocomposites for high performance applications Type de document : texte imprimé Année de publication : 2019 Article en page(s) : p. 1737-1749 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosion
Benzoxazine
Cardanol
Composés inorganiques -- Synthèse
Composés organiques -- Synthèse
Dioxyde de silicium
Dioxyde de titane
Matériaux -- Propriétés fonctionnelles
Métaux -- Revêtements protecteurs
Polybenzoxazine
Revêtements -- Analyse
Revêtements -- Propriétés thermomécaniques
Revêtements organiques
Transition vitreuseIndex. décimale : 667.9 Revêtements et enduits Résumé : In the present work, three types of polybenzoxazines were synthesized using caprolactam-based diamine (CPA-NH2) and formaldehyde with different phenols, namely 4-fluorophenol, cardanol, and phenol, under appropriate experimental conditions. The molecular structure of the benzoxazine monomers was confirmed by FTIR, 1H, and 13C NMR spectroscopic techniques. Polybenzoxazines were obtained through ring-opening polymerization of benzoxazine monomers, and their formation was confirmed by FTIR spectroscopy. The elemental composition and morphological behavior of polybenzoxazines were characterized by SEM-EDAX and AFM techniques. The naturally occurring cardanol- and caprolactam-based diamine (CPA-NH2)-based benzoxazine was selected for detailed studies. The synthesized SiO2–TiO2 nanohybrid reinforcement was functionalized with 3-aminopropyltrimethoxysilane (3-APS) and reinforced with cardanol-based benzoxazine (CPBz) monomer. The resulted nanocomposites were studied for their corrosion protection behavior against mild steel surface along with thermomechanical (TGA and DMA) and morphological (SEM, XRD, and TEM) properties. The results obtained from electrochemical impedance analysis indicate that the 5 wt% of F–SiO2–TiO2 of reinforced CPBz exhibits an effective corrosion-resistant behavior toward surface of steel specimen than that of other samples. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of caprolactam diamine (CPA-NH2) - Synthesis of phenol-based benzoxazine (PBz) - Synthesis of 4-fluorophenol-based benzoxazine (FPBz) - Synthesis of cardanol-based benzoxazine (CPBz) - Synthesis of SiO2 nanosilica - Preparation of SiO2-TiO2 and functionalized SiO2-TiO2 nanoparticles - Preparation of neat CPBz and F-SiO2-TiO2- reinforced CPBZ nanocomposites - Surface preparation of the mild steel specimens - Preparation of neat CPBz and F-SiO2-TiO2
- RESULTS AND DISCUSSION : FTIR analysis - NMR analysis - XRD analysis - Thermal properties - Dynamic mechanical analysis (DMA) - Morphological studiesDOI : 10.1007/s11998-019-00263-w En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-019-00263-w.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33427
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 6 (11/2019) . - p. 1737-1749[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21321 - Périodique Bibliothèque principale Documentaires Disponible Diagramme Temps – Température – Transformation (TTT) du système réactif thermodurcissable (DGEBA-DETDA). Domaine de rotomoulabilité / E. Mounif in MATERIAUX & TECHNIQUES, Vol. 94, N° 5 (2006)
[article]
Titre : Diagramme Temps – Température – Transformation (TTT) du système réactif thermodurcissable (DGEBA-DETDA). Domaine de rotomoulabilité Type de document : texte imprimé Auteurs : E. Mounif, Auteur ; V. Bellenger, Auteur ; A. Tcharkhtchi, Auteur Année de publication : 2007 Article en page(s) : p. 345-354 Note générale : Bibliogr. Langues : Français (fre) Catégories : Epoxydes
Gélification
Matières plastiques -- Rotomoulage
Thermodurcissables
Transition vitreuseTags : 'Résine époxy' Vitrification 'Diagramme TTT' Temps Température Transformation Gélification Rotomoulage Index. décimale : 620.192 Polymères, plastiques Résumé : Le rotomoulage réactif est un procédé prometteur pour les résines époxy. Il existe peu de travaux sur ce sujet. Le but de cette étude est de déterminer les conditions optimales (temps, température, viscosité...) pour le rotomoulage. La forme de l'objet est figée par la gélification, phénomène critique au-delà duquel la mise en forme n'est pas possible. L'analyse thermique et rhéologique du système DGEBA-DETDA a permis l'établissement du diagramme temps-température-transformation. L'ajout des courbes d'iso-viscosité au diagramme TTT a permis de déterminer le domaine de rotomoulabilité. DOI : http://dx.doi.org/10.1051/mattech:2007008 En ligne : http://www.mattech-journal.org/fr/articles/mattech/pdf/2006/05/mt06050.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10179
in MATERIAUX & TECHNIQUES > Vol. 94, N° 5 (2006) . - p. 345-354[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007604 - Périodique Bibliothèque principale Documentaires Disponible Dielectric cure analysis / Nathaniel T. Smith in EUROPEAN COATINGS JOURNAL (ECJ), N° 12/95 (12/1995)
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Titre : Dielectric cure analysis Type de document : texte imprimé Auteurs : Nathaniel T. Smith, Auteur ; David D. Shepard, Auteur Année de publication : 1995 Article en page(s) : p. 930-935 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Diélectriques
Matières plastiques
Réticulation (polymérisation)
Rhéologie
Transition vitreuse
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : In the past, dielectric analysis (DEA) has been used as an important measurement component in the overall analysis of polymer resin systems. Much of this work has been done at the research level in determining viscosity behavior, rate of cure, and cure endpoint. In the areas where DEA has been used in the production environment, it has been in the low volume applications of aerospace composites. Within the last several years there has been an expansion of the applications where dielectric cure analysis has been used. This growth in the applications of dielectric cure analysis has expanded beyond the traditional areas of monitoring the cure of composites to include such applications as factory floor control of molding operations, monitoring resin synthesis, reduction and/or elimination of physical testing, diffusion monitoring, and SQC analysis. These applications and other techniques will be presented. Note de contenu : - Traditional cure comparison
- Dielectric correlation to glass transitions
- Dielectric correlation to viscosity
- Dielectric comparison with DSC
- Dielectric applications
- Research and development
- Quality assurance
- Production control
- Resin synthesis, batch reaction monitoring
- DiffusionPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11378
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Code-barres Cote Support Localisation Section Disponibilité 002511 - Périodique Bibliothèque principale Documentaires Disponible Dynamic mechanical thermal analysis (DMTA) of leather. Part 1 : Effect of tanning agent on the glass transition temperature of collagen / S. Jeyapalina in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 91, N° 6 (11-12/2007)
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Titre : Dynamic mechanical thermal analysis (DMTA) of leather. Part 1 : Effect of tanning agent on the glass transition temperature of collagen Type de document : texte imprimé Auteurs : S. Jeyapalina, Auteur ; Geoffrey E. Attenburrow, Auteur ; Anthony D. Covington, Auteur Année de publication : 2007 Article en page(s) : p. 236-242 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de tannage
Analyse mécanique dynamique
Analyse thermique
Collagène
Tannage
Transition vitreuseIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : We report the dynamic mechanical behaviour of leather within the temperature range - 100 to 300°C, where three major viscoelastic transitions were identified, termed α, β and γ. The β transition peak represents the glass transition temperature of the amorphous region of collagen molecules. It also demonstrates that tanning agents act as plasticisers and depress the glass transition temperature to a lower temperature. Thus, the tanning process itself may be viewed as a plasticisation of the collagen molecule : the tanning molecules interpose themselves between the collagen chains, thus reducing the forces holding the chains together. Different tanning agents show differing degrees of plasticisation. Note de contenu : - MATERIALS AND METHODS : Materials - Sample preparation for DMTA studies - Dynamic Mechanical Thermal Analysis - Differential Scanning Calorimetry (DSC) - Collagen content determination
- RESULTS AND DISCUSSION :
- Table 1 : Transition temperatures of tanned and untanned skin, conditioned at 0%RHEn ligne : https://drive.google.com/file/d/1i9tpKuP7Ect5b6ffo4KztaEbkbTEk5nW/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39005
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 91, N° 6 (11-12/2007) . - p. 236-242[article]Effect of humidity on curing of alkoxysilane-functionalized alkyd coatings / Brittany Pellegrene in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
[article]
Titre : Effect of humidity on curing of alkoxysilane-functionalized alkyd coatings Type de document : texte imprimé Auteurs : Brittany Pellegrene, Auteur ; Mark D. Soucek, Auteur Année de publication : 2021 Article en page(s) : p. 1543-1555 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Formation de film
Formulation (Génie chimique)
Humidité
Polyalkoxysiloxane
Polyalkydes
Polymères -- Synthèse
Revêtements -- Effets de l'humidité
Revêtements -- Propriétés mécaniques
Revêtements -- Propriétés thermiques
Rhéologie
Traction (mécanique)
Transition vitreuse
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : The effect of relative humidity on the curing of alkoxysilane functional alkyds and reactive diluents was evaluated. Alkoxysilane functional alkyds and tung oil-based reactive diluents were synthesized and used as additives in varying amounts in alkyd coatings. Looking at modified alkyd versus modified reactive diluent allows for the comparison of the humidity effect on high and low molecular weight alkoxysilane functional additives. The coatings were cured at 25 and 75% relative humidity and evaluated for drying time, coating and tensile properties, and gel content. It was found that at higher humidity, the alkoxysilane-containing samples improved properties significantly when compared to the control alkyd. Note de contenu : EXPERIMENTAL : Materials - Instrumentation - Alkyd resin synthesis (LLOA) - Alkoxysilane-modified alkyd resin synthesis (ASLOA) - Alkoxysilane-modified tung oil (ASTO) synthesis - Viscosity measurements - Formulations and film preparation - Coating properties - Tensile testing
- RESULTS : Synthesis and characterization - Film formation - Coatings properties - Tensile properties - Thermal properties - Gel content
- Table 1 : Formulations with ASLOA
- Table 2 : Formulations with ASTO
- Table 3 : Drying times of samples cured in different relative humidity conditions
- Table 4 : Coating properties of samples cured at 25 %RH
- Table 5 : Coating properties of samples cured at 75 %RH
- Table 6 : Glass transition temperature of the samples cured at varying relative humidityDOI : https://doi.org/10.1007/s11998-021-00494-w En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00494-w.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36807
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