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Auteur Sergei Nazarenko |
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Kinetics analysis and physical properties of photocured silicate-based thiol-ene nanocomposites : The effects of vinyl POSS ene on the polymerization kinetics and physical properties of thiol-triallyl ether networks / Tolecia S. Clark in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 5, N° 3 (09/2008)
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Titre : Kinetics analysis and physical properties of photocured silicate-based thiol-ene nanocomposites : The effects of vinyl POSS ene on the polymerization kinetics and physical properties of thiol-triallyl ether networks Type de document : texte imprimé Auteurs : Tolecia S. Clark, Auteur ; Charles E. Hoyle, Auteur ; Sergei Nazarenko, Auteur Année de publication : 2008 Article en page(s) : p. 345-351 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Matériaux hybrides
Photoréticulation
Silsesquioxanes oligomères polyhèdres
Stabilité thermique
ThiolsIndex. décimale : 667.9 Revêtements et enduits Résumé : The kinetics and thermal/physical properties of the trithiol-TAE (triallyl ether) system were measured with respect to increasing polyoligomeric silsesquioxane (POSS) concentrations in order to understand how the presence of POSS nanoparticles affects network formation at low loadings. Vinyl POSS monomer (vPOSS-Bu4) with both vinyl and carboxylate pendant groups was synthesized via a thermally initiated, free-radical reaction to improve the compatibility of the inorganic particles with the trithiol and triallyl ether comomoners. Chemically modified vPOSS-Bu4 particles were incorporated into the trithiol-TAE polymer networks by a thiol-ene free-radical photopolymerization at molar concentrations of 0, 1, and 5 ene mol%. The polymerization rates were analyzed using real-time FTIR and photo-DSC. The polymerization rates showed no significant changes with increasing vPOSS-Bu4 concentration. Thermal analyses of the films by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) demonstrated that thermal stability improves without affecting T g as the POSS concentration increased. Additionally, scratch resistance increased and flame spread decreased markedly with increasing POSS concentration for concentrations up to 5 mol% vPOSS-Bu4. DOI : 10.1007/s11998-008-9092-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-008-9092-x.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2978
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 5, N° 3 (09/2008) . - p. 345-351[article]Réservation
Réserver ce documentThermotropic, side-chain ordered polymeric coatings : gas permeability switching via a thermal stimulus / James Goetz in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 2 (03/2014)
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Titre : Thermotropic, side-chain ordered polymeric coatings : gas permeability switching via a thermal stimulus Type de document : texte imprimé Auteurs : James Goetz, Auteur ; Sergei Nazarenko, Auteur Année de publication : 2014 Article en page(s) : p. 123-139 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Cristaux liquides thermotropes
Fluoropolymères
Gaz
Membranes (technologie)
Perméabilité
Perméation
Polyacrylates
Polymères ramifiésIndex. décimale : 667.9 Revêtements et enduits Résumé : Rapid access to large areas of stimuli-responsive materials is attractive in the field of membrane science for purification systems and molecular valves. Thermotropic liquid crystalline (LC) systems show sharp property changes through the smectic–LC transition induced by temperature. Comparison of similar amorphous and liquid crystalline systems allows for the elucidation of the characteristics of the LC phase. Lightly crosslinked C6F13 and C8F17 perfluorinated side-chain acrylate networks were UV cured as thin films resulting in amorphous and thermotropic liquid crystalline thin films, respectively. Thermal and morphological characterization indicates a restructuring of the liquid crystalline phase through the isotropic transition giving rise to an increase in transport and free volume properties. The amorphous film showed no dramatic change in transport or free volume properties. Note de contenu : - EXPERIMENTAL : Material - Characterization
- RESULTS AND DISCUSSION : Solid state structure - Transport and free volume behaviorDOI : 10.1007/s11998-013-9518-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9518-y.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21147
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 2 (03/2014) . - p. 123-139[article]Réservation
Réserver ce document