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Films formed from polystyrene latex/clay composites : A fluorescence study / Saziye Ugur in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 2, N° 7 (07/2005)
[article]
Titre : Films formed from polystyrene latex/clay composites : A fluorescence study Type de document : texte imprimé Auteurs : Saziye Ugur, Auteur ; Önder Pekcan, Auteur ; Ayse Alemdar, Auteur Année de publication : 2005 Article en page(s) : p. 565-575 Note générale : Bibliogr. Langues : Américain (ame) Tags : 'Propriété optique' 'Spectrométrie de fluorescence' 'Etude Morphologique' Transparence Recuit 'Relation mise en oeuvre structure' 'Effet concentration' la température' propriété' Montmorillonite 'Formation film' 'Matériau renforcé' Dispersion composite' Argile Latex Polystyrène Index. décimale : 667.9 Revêtements et enduits Résumé : This study reports a steady-state fluorescence (SSF) technique for studying film formation from surfactant-free polystyrene (PS) latex and Na-montmorillonite (SNaM) composites. The composite films were prepared from pyrene (P)-labeled PS particles and SNaM clay at room temperature and annealed at elevated temperatures in 10-min intervals above glass transition temperature (Tq) of polystyrene. During the annealing processes, the transparency of the film improved considerably. Scattered light (IS) and fluorescence intensity (IP) from P were measured after each annealing step to monitor the stages of film formation. Evolution of transparency of composite films was monitored by using photon transmission intensity, Itr. Scanning electron microscopy (SEM) was used to detect the variation in physical structure of annealed composite films. Minimum film formation temperature, T0' and healing temperatures, Th' were determined. Void closure and interdiffusion stages were modeled and related activation energies were determined. It was observed that both activation energies increased as the percent of SNaM was increased in composite films. DOI : 10.1007/s11998-005-0016-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-005-0016-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3804
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 2, N° 7 (07/2005) . - p. 565-575[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 002327 - Périodique Bibliothèque principale Documentaires Disponible Surface and interface characterization of chlorinated polyolefin coated thermoplastic polyolefin / Yuechun Ma in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 2, N° 5 (01/2005)
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Titre : Surface and interface characterization of chlorinated polyolefin coated thermoplastic polyolefin Type de document : texte imprimé Auteurs : Yuechun Ma, Auteur ; Mitchell A. Winnik, Auteur ; Phillip V. Yaneff, Auteur ; Rose Ann Ryntz, Auteur Année de publication : 2005 Article en page(s) : p. 407-416 Note générale : Bibliogr. Langues : Américain (ame) Tags : Polyoléfines Caractérisation 'Interface polymère' Polymère 'Etude expérimentale' 'Spectrométrie fluorescence' 'Méthode analyse' 'Structure interface' surface' 'Effet solvant' 'Relation mise en oeuvre structure' 'Polymère chloré' 'Oléfine dérivé halogéné 'Couche primaire' 'Traitement Prétraitement 'Matériau revêtu' 'Caoutchouc éthylène propène' 'Mélange Polypropène thermoplastique' Index. décimale : 667.9 Revêtements et enduits Résumé : Laser scanning confocal fluorescence microscopy measurements were performed on thermoplastic polyolefin (TPO) substrates that were coated with chlorinated polyolefin (CPO). The TPO investigated was a blend of high modulus polypropylene with an ethylene-butene copolymer (EBR9) containing 9 wt% butene. The CPO was a maleated chlorinated polypropylene containing 20 wt% Cl. The purpose of these experiments was to obtain detailed mechanistic information about the CPO-TPO interaction. To achieve acceptable contrast in these measurements, a fluorescent dye was covalently attached to a small portion of the CPO. Solvent wiping of the TPO substrates with isopropyl alcohol followed by xylenes prior to coating with CPO increased the mean roughness of the TPO surface by more than 100 nm; but it had a much larger effect on the roughness of the (several micrometers) CPO-TPO interface after coating. The EBR component of the TPO was shown to be exclusively responsible for the roughness increase. We also found evidence of a diffuse interface between the CPO and ERB components that was localized to sites in which the EBR was present at the TPO surface. DOI : 10.1007/s11998-005-0008-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-005-0008-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3730
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 2, N° 5 (01/2005) . - p. 407-416[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000589 - Périodique Bibliothèque principale Documentaires Disponible