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Preparation and characterization of a stable core-shell latex with VAE in the core / Shi Luo in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVII, N° 9 (09/2012)
[article]
Titre : Preparation and characterization of a stable core-shell latex with VAE in the core Type de document : texte imprimé Auteurs : Shi Luo, Auteur ; Bailing Liu, Auteur Année de publication : 2012 Article en page(s) : p. 286-291 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acrylate de butyle
Caractérisation
Copolymère éthylène acétate de vinyle
Core-Shell
Fourier, Spectroscopie infrarouge à transformée de
Latex
Lumière -- Diffusion
Microscopie électronique en transmission
Persulfate d'ammonium
Polymérisation en émulsion
StyrèneIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : A core-shell latex containing Butyl Acrylate (BA) and Styrene (St) in shell, and Vinyl Acetate-Ethylene (VAE) in core was successfully prepared by seeded emulsion polymerization with water as the reaction medium. Several key elements related to the polymerization, including core/shell ratio, BA/St ratio and Ammonium persulfate (APS) dosages were investigated in details. Accordingly, an optimal reaction condition was developed. The synthesized l,atex particles were characterized by Transmission electron microscopy (TEM) and Dynamic light scattering (DLS). The clear core-shell structure and chemical components of the core-shell latex particles were determined by TEM and Fourier transform infrared (FTIR) spectrometry, respectively. In addition, the comparisons between the core-shell latex and VAE latex were made. The experimental results indicated that the developed core-shell latex produced improved leather related properties for thermal stability, water resistance and adhesion. Note de contenu : - MATERIALS
- SEEDED EMULSION POLYMERIZATION
- CHARACTERIZATION : Solid content and conversion - Stability of the emulsion - Water absorption ratio - Thermogravimetric analysis - Adhesive strength - Infrared spectra - Particle size and morphology
- SYNTHESIS CONDITIONS OF THE CORE/SHELL : Core/shell ratio - BA/St ratio - APS dosage
- FTIR SPECTRA
- LATEX PARTICLE MORPHOLOGY OF CORE-SHELL EMULSION
- THERMAL STABILITY ANALYSIS
- WATER ABSORPTION OF EMULSION FILMS
- ADHESION PERFORMANCE OF EMULSIONS
- TABLE I : Recipes for the preparation of core-shell (BA-St-VAE) by seeded emulsion polymerization with various core/shell ratio
- TABLE II : Recipes for the preparation of core-shell (BA-St-VAE) by seeded emulsion polymerization with various BA/St ratio
- TABLE III : Recipes for the preparation of core-shell (BA-St-VAE) by seeded emulsion polymerization with various content of APS
- TABLE IV : The latex stability with various core/shell ratio
- TABLE V : The emulsion stability with various BA/St ratio
- TABLE VI : The latex stability and polymerization conversion with various APS dosage
- TABLE VII : The water absorption ratio and contact angle of latex films
- TABLE VIII : The adhesive strength of emulsionsEn ligne : https://drive.google.com/file/d/1pzeVlxUmYVjPxtCANlg-jhi6qjpX1U-T/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16059
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVII, N° 9 (09/2012) . - p. 286-291[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14267 - Périodique Bibliothèque principale Documentaires Disponible 14209 - Périodique Bibliothèque principale Documentaires Disponible Preparation and evaluation of b-carotene containing microemulsion / Xiuhan Yan in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 50, N° 2 (03-04/2013)
[article]
Titre : Preparation and evaluation of b-carotene containing microemulsion Type de document : texte imprimé Auteurs : Xiuhan Yan, Auteur ; Zhengwu Wang, Auteur Année de publication : 2013 Article en page(s) : p. 113-117 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Carotène
Colorants -- Stabilité
Lumière -- Diffusion
Microémulsions
ViscositéIndex. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : Microemulsions (O/W, W/O and B.C.) formed in Tween80/ethanol/ethyl butyrate/water system were identified by phase diagram determination and conductivity measurement at 25 °C. Comparative studies were made, by means of dynamic light scattering, viscosity and UV measurements, on (1) the difference of viscosity and particle size between ?-carotene solubilized and empty microemulsions; (2) the effects of sunlight and temperature on the stability of ?-carotene both in microemulsion and in ethyl butyrate solution. It is shown that in ?-carotene loaded systems, the mean particle diameter is 82.13 nm and the size distributions were quite broad (PDI = 0.35). Smaller particles (31.75 nm) and narrower particle size distribution of droplets (PDI = 0.14) were obtained in empty microemulsion. The sizes of droplets of both ?-carotene loaded and empty ones get shrunk sharply in the first 3 days, then keep remarkable stability even for a month. ?-carotene solubilized in microemulsion is much more stable than that solubilized in ethyl butyrate solution. Note de contenu : - MATERIALS AND METHODS : Materials - Construction of pseudo-ternary phase diagrams - Solubilization measurements - Viscosity measurements - Particle size determination - Stability assay
- RESULTS AND DISCUSSION : Characterization of microemulsion - Solubilization of beta-carotene - Rheological behavior - Particle diameter - Stability of beta carotene in microemulsionDOI : 10.3139/113.110231 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17889
in TENSIDE, SURFACTANTS, DETERGENTS > Vol. 50, N° 2 (03-04/2013) . - p. 113-117[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14844 - Périodique Bibliothèque principale Documentaires Disponible Reaction-driven solvent transport in UV-curable phase-separating coatings in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 1 (01/2023)
[article]
Titre : Reaction-driven solvent transport in UV-curable phase-separating coatings Type de document : texte imprimé Année de publication : 2023 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Fourier, Spectroscopie infrarouge à transformée de
Lumière -- Diffusion
Microscopie électronique à balayage
Photoréticulation
Polyester acrylate
Réaction de couplage
Réflexion totale atténuée
Revêtement en phase solvant
Revêtements -- Séchage sous rayonnement ultraviolet
Revêtements organiques
Séparation de phasesIndex. décimale : 667.9 Revêtements et enduits Résumé : We experimentally examined the time-evolutions of local compositions in photocurable, monomer-solvent-initiator ternary liquid film coatings using attenuated total-reflectance-Fourier transform infrared spectroscopy. The coatings exhibited phase separation upon UV exposure owing to the inherent partial miscibility between the solvent and the polymer. The solvent concentration at the bottom of the coating increased when exposed to UV light for 1 s from the top, showing a solvent transport along the irradiation direction. The differences in solvent concentration before and after UV exposure showed good agreement with model predictions based on stress-induced non-Fickian solvent mass transport. The solvent concentrations at the bottom remained constant in the case of discrete phase structures, whereas it exponentially decayed over time in bicontinuous phase structures. These results suggest that light-tunable microstructures enable the relaxation of the reaction-driven nonuniformity in solvent concentration distributions. Note de contenu : - Materials
- Attenuated total reflectance-Fourier transform infrared (ATR-FTIR) analysis
- Scanning electron microscopy
- Light scattering analysis
- Table 1 : Material constants to express A1363/A981 as a cubic function with respect to the solvent mass fractionDOI : https://doi.org/10.1007/s11998-022-00661-7 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00661-7.pdf?pdf=button% [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38778
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Code-barres Cote Support Localisation Section Disponibilité 23928 - Périodique Bibliothèque principale Documentaires Disponible Response to "Dependent light scattering in white paint films : clarification and application of the theoretical concepts" / Susan Fitzwater in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 6 (11/2013)
[article]
Titre : Response to "Dependent light scattering in white paint films : clarification and application of the theoretical concepts" Type de document : texte imprimé Auteurs : Susan Fitzwater, Auteur ; John W. Hook, Auteur Année de publication : 2013 Article en page(s) : p. 923-927 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Chlorure de polyvinyle
Dioxyde de titane
Lumière -- Diffusion
Revêtements -- Propriétés optiques:Peinture -- Propriétés optiquesIndex. décimale : 667.9 Revêtements et enduits Note de contenu : - Dependent and multiple scattering : are they different ?
- Concentration thresholds for dependent scattering : do they exist ?
- Practical semiempirical hiding models for paintsDOI : 10.1007/s11998-013-9508-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9508-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19834
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Code-barres Cote Support Localisation Section Disponibilité 15744 - Périodique Bibliothèque principale Documentaires Disponible A rich harvest with the right earth / Siegfried Heckl in KUNSTSTOFFE INTERNATIONAL, Vol. 112, N° 7 (2022)
[article]
Titre : A rich harvest with the right earth : Neubourg siliceous earth improves the performance of PE greenhouse film Type de document : texte imprimé Auteurs : Siegfried Heckl, Auteur ; Petra Zehnder, Auteur ; Hubert Oggermüller, Auteur Année de publication : 2022 Article en page(s) : p. 90-93 Langues : Anglais (eng) Catégories : Charges (matériaux)
Copolymère éthylène acétate de vinyle
Films plastiques
Granulométrie
Lumière -- Diffusion
Polyéthylène
Protection contre le rayonnement infrarouge
Taille des particules
Terre siliceuse de NeubourgIndex. décimale : 668.4 Plastiques, vinyles Résumé : Greenhouse film should transmit visible light but trap infrared radiation inside the greenhouse. Unfilled PE film cannot wholly accomplish the latter. With the right filler, however, the film can be a strong IR blocker. Just how well it performs depends very much on the particle size of the additives, as shown in tests on Neuburg siliceous earth. Note de contenu : - IR blocker with Neuburg siliceous earth
- Wider-ranging and more uniform light scattering
- Particle size influences haze and optical impression
- IR efficiency increased by over 50 %
- Do PE/EVA and Neuburg ziliceous earth complement each other ?
- Over 80 % IR EfficiencyEn ligne : https://en.kunststoffe.de/a/specialistarticle/a-rich-harvest-with-the-right-eart [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38428
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Code-barres Cote Support Localisation Section Disponibilité 23588 - Périodique Bibliothèque principale Documentaires Disponible Study on interaction mechanism between neutral salts and collagen by combining experiments with molecular dynamics simulation / Min Gu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 7 (07/2023)
PermalinkThe best for red and yellow- A new additive technology for waterborne iron oxide pigment concentrates / Frank Kleinsteinberg in PAINTINDIA, Vol. LXX, N° 9 (09/2020)
PermalinkThe critical role of particle size distribution in inkjet ink performance / Anne Virden in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 207, N° 4631 (05/2017)
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PermalinkThe use of Monte Carlo simulation to evaluate the optical properties of polyester fabric treated with titanium dioxide nanopigments / Laleh Asadi in COLORATION TECHNOLOGY, Vol. 139, N° 1 (02/2023)
PermalinkTheoretical evaluation of the impact of finite intervals in the measurement of the bidirectional reflectance distribution function / Alejandro Ferrero in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
PermalinkTheoretical study and experimental analysis of the scattering efficiency of hollow polymer particles in the dependent light scattering regime / J.-C. Auger in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 4 (07/2015)
PermalinkTiO2 scattering optimization and not-in-kind opacity alternatives / Michael P. Diebold in COATINGS TECH, Vol. 10, N° 2 (02/2013)
PermalinkUse of optical density and TiO2 light scattering / R. T. Abrahao in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 206, N° 4624 (09/2016)
PermalinkViscosity properties of collagen solutions : influence of pH, salt type and salt concentration / Kai Lei in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 3 (05-06/2018)
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