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Fast systems for lighter automobiles / Michael Henningsen in KUNSTSTOFFE INTERNATIONAL, Vol. 101, N° 9 (09/2011)
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Titre : Fast systems for lighter automobiles Type de document : texte imprimé Auteurs : Michael Henningsen, Auteur Année de publication : 2011 Article en page(s) : p. 41-44 Langues : Anglais (eng) Catégories : Catalyseurs
Composites à fibres de carbone
Epoxydes
Matières plastiques dans les automobilesIndex. décimale : 668.4 Plastiques, vinyles Résumé : Latent Accelerators - Epoxy resin systems specifically intended for use with carbon composite materials open up new possibilities for lightweight automotive construction. These newly developed latent accelerators have a considerably longer pot life than conventional systems, but their curing time is far shorter. Moreover, the fibers of e.g. carbon composites are optimally wetted without impairing their mechanical properties. Thus, the epoxy systems meet the demands of automakers. Note de contenu : - The problem of conflicting necessities
- Latent accelerator concept solves the conflictPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15025
in KUNSTSTOFFE INTERNATIONAL > Vol. 101, N° 9 (09/2011) . - p. 41-44[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13328 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Fired up : New quick-cure reactive hot-melt adhesives enhance automotive trim bonding Type de document : texte imprimé Auteurs : Ju-Ming Hung, Auteur Année de publication : 2000 Article en page(s) : p. 18-22 Langues : Américain (ame) Catégories : Adhésifs dans les automobiles
Adhésifs thermofusibles
Catalyse
Catalyseurs
Matériaux autoréparants
Résistance au cisaillementIndex. décimale : 668.3 Adhésifs et produits semblables Résumé : The fast-cured version of RHM adhesives have better curing rate and initial strength to improve assembly rates. With this technology, the reactive hot-melt adhesives provide several characteristics, such as good melt stability with a reliable cure at the different environmental humidities and consistent high-quality control products. Note de contenu : - Table 1 : The lap shear strength increase with the different catalysts
- Table 2 : Melt stability of the catalyzed reactive hot-melt adhesives
- Table 3 : Melt stability studies of RHM at 250°F to open airEn ligne : https://drive.google.com/file/d/1MZffU9fXfcExUYDzW95_MP6KHcaF-4Iu/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19723
in ADHESIVES AGE > Vol. 43, N° 3 (03/2000) . - p. 18-22[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001453 - Périodique Bibliothèque principale Documentaires Disponible Functional cellulose fibers via polycarboxylic acid/carbon nanotube composite coating / Farbod Alimohammadi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 1 (01/2013)
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Titre : Functional cellulose fibers via polycarboxylic acid/carbon nanotube composite coating Type de document : texte imprimé Auteurs : Farbod Alimohammadi, Auteur ; Mazeyar Parvinzadeh, Auteur ; Ali Shamei, Auteur Année de publication : 2013 Article en page(s) : p. 123-132 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Catalyseurs
Composites -- Propriétés électriques
CotonLe 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).
Esters de cellulose
Hypophosphite de sodium
Matériaux -- Propriétés fonctionnelles
Nanotubes
Polycarboxylique, Acide
Revêtement conducteur
Stabilité thermique
Surfaces -- Analyse
Textiles et tissusIndex. décimale : 667.9 Revêtements et enduits Résumé : In this study, carbon nanotubes (CNTs) were stabilized on a cotton surface using 1,2,3,4-butanetetracarboxylic acid (BTCA) as a crosslinking agent and sodium hypophosphite as a catalyst. The influence of CNTs on the performance of the cellulose fiber was investigated using a Raman spectrophotometer, thermogravimetric analyzer, a scanning electron microscope, electrical contacting equipment, and an electromagnetic field detector. The possible interactions between CNTs, a crosslinking agent, and cellulose functional groups at the surface were elucidated by Raman spectroscopy. The results indicate that the stabilized CNTs modify the surface of the fibers and increase the functionality and thermal stability of the substrate. SEM showed a uniform coating of CNTs on the fiber surface. Note de contenu : - EXPERIMENTAL : Materials - Preparation of colloidal dispersions of MWCNTs and their coating on cotton - Raman spectroscopy - Thermal and flammability properties - Evaluation of morphology by microscope - Evaluation of the electrical resistance of surface - Measurement of electromagnetic properties
- RESULTS AND DISCUSSION : Structural information by Raman spectroscopy - Determination of thermal properties and flammability - Microscopic characterization - Electrical resistance properties of samples - Evaluation of electromagnetic propertiesDOI : 10.1007/s11998-012-9429-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9429-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17480
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 1 (01/2013) . - p. 123-132[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14636 - Périodique Bibliothèque principale Documentaires Disponible 15124 - Périodique Bibliothèque principale Documentaires Disponible Green chemistry for low VOC and waste management / Shradha Krishna Pednekar in PAINTINDIA, Vol. LXVII, N° 4 (04/2017)
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Titre : Green chemistry for low VOC and waste management Type de document : texte imprimé Auteurs : Shradha Krishna Pednekar, Auteur Année de publication : 2017 Article en page(s) : p. 80-88 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Accidents -- Prévention
Catalyseurs
Chimie écologique
Déchets -- Elimination
Déchets -- Réduction
Efficacité énergétique
Fluides supercritiques
Pollution -- Lutte contre
Produits chimiques -- Biodégradation
Ressources renouvelables
Solvants écologiquesIndex. décimale : 660 Technologie chimique (chimie industrielle) et techniques connexes Résumé : The uses of hazardous and toxic solvents in paint laboratories and in paint industries are considered a very crucial problem for health and safety of workers and environment. Majority of solvents are organic chemicals with harmful and toxic properties, large waste part of by-products of the chemical industry causing environmental and health problems, but its uses are important. So, it is better to prevent voc and minimize waste than to face problems and treat or clean up waste after it has been created, therefore, it is widely acknowledged that there is a growing need for more environmentally acceptable processes in the chemical industry.
The trend towards what has become known as Green Chemistry' or Sustainable Technology', necessitates a paradigm shift from traditional concepts of process efficiency, that focus largely on chemical yield, that assigns economic value to eliminating waste at source and avoiding the use of toxic and/or hazardous substances.
The review paper is mainly based on the Green chemistry, which places both company profitability and ecological health at the heart of innovative product design and manufacturing. It uses the creativity of nature's biological processes to create molecules, materials and processes that are safe and high-performing.Note de contenu : - SUSTAINABLE GREEN CHEMISTRY : Economic - Materials - Waste
- GOALS OF GREEN CHEMISTRY : 1. Prevent waste - 2. Maximize atome economy - 3. Less hazardous chemical synthesis - 4. Designing safer chemicals and products - 5. Safer solvents and reaction condition - 6. Increase energy efficiency - 7. Use renewable feedstock - 8. Avoid chemical derivatives (protecting groups) - 9. Use catalysts - 10. Design chemicals and products to degrade after use - 11. Real time analysis for pollution prevention - 12. Minimize potential for accidents
- GREEN SOLVENTS FOR LOW/NO VOC : Green solvents - a. Oxidations under green chemistry principles to reduce solvents - b. Catalytic selectivity in synthesis to reduce solvents - Process for bio solvent/green solvent (supercritical CO2)
- SUPERCRITICAL CO2 AS A SOLVENT : Importance of supercritical carbon dioxide
- WASTE MANAGEMENT
- COSTS OF WASTE : Source reduction - Recyclable products - Good management and control - Waste segregation
- CHALLENGES AND OPPORTUNITIES : Challenges - For every challenge offered by green chemistry revolution, there is also an exciting opportunity
- OPPORTUNITIES
- LIMITATIONS AND BENEFITS
- FUTURE TRENDS IN GREEN CHEMISTRY : Oxidation reagent and catalysis - Non covalent derivatization - Supramolecular chemistry - Biometric multifunctional reagents - Combinatorial green chemistry - Energy focus - Proliferation of solvent less reactionEn ligne : https://drive.google.com/file/d/1o-_ByFjnQh2n7QhFA6KbdXLTp1GjCD89/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28461
in PAINTINDIA > Vol. LXVII, N° 4 (04/2017) . - p. 80-88[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18866 - Périodique Bibliothèque principale Documentaires Disponible High-Solids coatings using benzylanilinium sulfonates-II a,a-dimethylbenzylpyridinium p-toluenesulfonate, an effective blocked sulfonic acid / S. Nakano in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 68, N° 859 (08/1996)
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Titre : High-Solids coatings using benzylanilinium sulfonates-II a,a-dimethylbenzylpyridinium p-toluenesulfonate, an effective blocked sulfonic acid Type de document : texte imprimé Auteurs : S. Nakano, Auteur ; T. Morimoto, Auteur ; T. Endo, Auteur Année de publication : 1996 Article en page(s) : p. 83-90 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Ammoniums quaternaires -- Composés
Benzène -- Dérivés
Catalyseurs
Haut extrait sec
MélamineLa mélamine, de nom chimique 1,3,5-triazine-2,4,6-triamine, est parfois dénommée cyanuramide ou cyanurotriamine. Sa formule brute est C3H6N6.
Les "résines mélamine-formaldéhyde" ou "mélamine-formol" (sigle MF) sont appelées "mélamine" dans le langage courant. Elles font partie de la famille des aminoplastes qui regroupe des résines thermodurcissables aminées, issues d'un comonomère tel l'urée ou la mélamine, parfois le thiocarbamide, le cyanamide hydrogène ou le dicyandiamide ; le second comonomère étant le formaldéhyde.
Réticulation (polymérisation)
Stabilité au stockage
SulfonatesIndex. décimale : 667.9 Revêtements et enduits Résumé : α,α-Dimethylbenzylpyridinium ρ-toluenesulfonate (1), a new class of blocked sulfonic acids, was synthesized in good yield and some properties of 1 were compared with those of N-(ρ-methoxybenzyl)-N,N-dimethylanilinium ρ-toluenesulfonate (2), an effective blocked sulfonic acid. 1H-NMR analysis showed that 1 and 2 were able to release the corresponding amine blocked ρ-toluenesulfonic acid during the reaction with H2O and that the unblocking temperatures were 80°C and 75°C, respectively. Consequently, each aqueous solution turned acidic from neutral around 80°C. Furthermore, the hydrolysis properties of 1 and 2 were estimated by measuring the rate of hydrolysis for 1 and 2. It was found that the 1 activation energy (Ea) was higher than the 2 Ea during hydrolysis. Consequently, 1 showed better thermal latency than 2. Note de contenu : - EXPERIMENTAL : Synthesis of pyridinium SbF6 (5) - Synthesis of a,a-dimethylbenzylpyridinium SbF6 (1) - Measurement of pH of the aqueous solutions - Estimation of rate of hydrolysis - Estimation of unblocking temperatures - Synthesis of the acrylic polyol - Formulation of clear coating solutions - Evaluation of crosslinking reaction - Evaluation of storage stability
- RESULTS AND DISCUSSION : Synthesis of benzylpyridinium salts (1) - Synthesis of benzylanilinium sulfonates (2) - Temperature dependency of pH for aqueous solution containing catalysts - Stability of catalysts in aqueous solution - Rate of hydrolysis of catalysts - Unblocking reaction of catalysts - Properties of coating solutions - Crosslinking reaction of coating solutions - Storage stability of coating solutionsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18439
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 68, N° 859 (08/1996) . - p. 83-90[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003517 - Périodique Bibliothèque principale Documentaires Disponible Highly functional biobased polyols and their use in melamine–formaldehyde coatings / Thomas J. Nelson in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 6 (11/2013)
PermalinkHow to achieve faster dry times and more with high-performance catalysts in low-VOC alkyd coatings / Allison Abbey in COATINGS TECH, Vol. 19, N° 1 (01/2022)
PermalinkInfluence of acidic catalysts on epoxidation of soybean oil using per acid formed in-situ / V. K. Tyagi in PAINTINDIA, Vol. LVIII, N° 3 (03/2008)
PermalinkLow-temperature bleaching of cotton fabric with a binuclear manganese complex of 1,4,7-trimethyl-1,4,7-triazacyclononane as catalyst for hydrogen peroxide / Xinbo Qin in COLORATION TECHNOLOGY, Vol. 128, N° 5 (2012)
PermalinkLes nanofibres de carbone : un support de catalyseur polyvalent / Ricardo Vieira in L'ACTUALITE CHIMIQUE, N° 329 (04/2009)
PermalinkNatural sunlight assisted bentonite-ZnO mixed oxide catalyst for organic pollutant removal in leather post tanning wastewater with solar reactor / E. T. Deva Kumar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 8 (08/2018)
PermalinkNovel metal-free catalysts for epoxy carboxy coatings / Ravi Ravichandran in COATINGS TECH, Vol. 16, N° 3 (03/2019)
PermalinkOxazoline-based crosslinking reaction for coatings / Philipp Knospe in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 5 (09/2021)
PermalinkPhysico-chimie des tamis moléculaires hydratés : étude combinée expérience/théorie / Guillaume Poulet in L'ACTUALITE CHIMIQUE, N° 282 (01/2005)
PermalinkPickering interfacial catalysis for organic synthesis : a hotbed for innovation / Bing Hong in L'ACTUALITE CHIMIQUE, N° 434 (11/2018)
PermalinkPredicting the crease recovery performance and tear strength of cotton fabric treated with modified N-methylol dihydroxyethylene urea and polyethylene softener / Tanveer Hussain in COLORATION TECHNOLOGY, Vol. 126, N° 5 (2011)
PermalinkPreparation and application of polyesters : Activity of catalysts for esterification / D. Pavlov in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 87, B4 (12/2004)
PermalinkProduction of alkyd resins and their paints : Effect of catalyst on their properties / D. Doulia in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 89, B3 (09/2006)
PermalinkPermalinkRole of nanotechnology in waste minimization : a review / Jagdish R. Borse in PAINTINDIA, Vol. LXXI, N° 6 (06/2021)
PermalinkLe rôle stratégique de la chimie dans la transition énergétique in L'ACTUALITE CHIMIQUE, N° 387-388-389 (07-08-09-10/2014)
PermalinkSilane and catalyst effects on silylated polymer elastomers / Christopher Ross in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 22, N° 7 (07/2015)
PermalinkSilane and catalyst effects on silylated polymer elastomers / Christopher Ross in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 22, N° 3 (03/2015)
PermalinkSimultaneous tracking of hardness, reactant conversion, solids concentration, and glass transition temperature in thermoset polyurethane coatings / Ting Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 2 (03/2021)
PermalinkLe stockage des catalyseurs soumis à de nouvelles règles / Eric Gravier in PLASTIQUES & CAOUTCHOUCS MAGAZINE, N° 840 (05-06/2006)
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