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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
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 6 (11/2021) . - p. 1543-1555[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23146 - Périodique Bibliothèque principale Documentaires Disponible Effect of solvent volatility on diameter selection of bicomponent nanofibers produced by gas jet fiber process test / S. S. Rajgarhia in INTERNATIONAL POLYMER PROCESSING, Vol. XXXII, N° 5 (11/2017)
[article]
Titre : Effect of solvent volatility on diameter selection of bicomponent nanofibers produced by gas jet fiber process test Type de document : texte imprimé Auteurs : S. S. Rajgarhia, Auteur ; Sadhan C. Jana, Auteur Année de publication : 2017 Article en page(s) : p. 582-589 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation
Core-Shell
Evaporation
Fibres textiles bi-composant
Fibres textiles synthétiques
Nanofibres
Production
Réseaux polymères
Rhéologie
Solutions de polymère
solvants
ViscositéIndex. décimale : 668.4 Plastiques, vinyles Résumé : This paper addresses the role of solvent volatility on diameter selection of bicomponent polymer nanofibers produced via gas jet fibers (GJF) process whereby an axisymmetric turbulent gas jet is used for liquid jet initiation, liquid jet stretching, and solvent evaporation. Several morphological forms, such as interpenetrating network (IPN), bi-lobal, and core-shell are obtained by spinning homogeneous solutions of two immiscible polymers in two mutually miscible solvents. The diameter selection of fibers of the same morphology, e. g., bi-lobal, is achieved by spinning polymer solutions of two sets of solvents of different volatility. The results show that fiber diameter is strongly dependent on the value of vapor pressure of the solvents while the morphology is strongly dependent on the vapor pressure difference of the two respective solvents. The diameter selection by GJF process is most prominent for IPN nanofibers, moderately prominent for core-shell fibers, and almost indifferent for bi-lobal nanofibers. The relative rates of solvent evaporation are useful in interpreting the experimental trend. Note de contenu : - EXPERIMENTAL SECTION : Materials - Measurement of shear viscosity - Sample preparation - Method of fiber production - Fiber characterization - Fiber diameter - Evaporation time of the solvents
- RESULTS AND DISCUSSION : Fibers with IPN morphology - Fibers with bi-lobal morphology - Fibers with core-shell morphologyDOI : 10.3139/217.3453 En ligne : https://drive.google.com/file/d/1_Ebdocr2-JzpktuFq9jSVVp41zFbUi0X/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29425
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Code-barres Cote Support Localisation Section Disponibilité 19371 - Périodique Bibliothèque principale Documentaires Disponible Effects of acrylic syntans on thermo-mechanical and swelling behaviour of chrome-tanned bovine leather - A comparative assessment / Pankaj Kumar Tyagi in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 2 (03-04/2018)
[article]
Titre : Effects of acrylic syntans on thermo-mechanical and swelling behaviour of chrome-tanned bovine leather - A comparative assessment Type de document : texte imprimé Auteurs : Pankaj Kumar Tyagi, Auteur ; Pijush Kanti Chatopadhyay, Auteur ; Goutam Mukherjee, Auteur Année de publication : 2018 Article en page(s) : p. 88-98 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation
Cuirs et peaux -- Propriétés thermomécaniques
Cuirs et peaux de bovins
Etudes comparatives
Gonflement (physique)
Poids moléculaires
Polyacrylates
solvants
Syntans
ViscositéIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Four different samples of cow softy leather (designated CSAS0, CSAS1, CSAS2, and CSAS3) were prepared from a chrome-tanned cow wet-blue of Indien origin. CSAS0 was the control sample wherein no polyacrylate based syntan was added. OSAS1, CSAS2, and CSAS3 contain different polyacrylate based syntans (3% w/w), differing in molecular weight, in addition to the other common auxiliaries used in ail of the four samples. Other unit operations (physical and chemical) for manufacturing leather were the same in ail the samples. Thermal, mechanical, and solvent swelling behaviour of these four semples were studied and we attempted to correlate them with the cross-linking densities of the samples. The swelling behaviour was studied in five different solvents (e.g. water, toluene, xylene, methyl ethyl ketone (MEK), and acetone), assuming definite solvent-bovine collagen interaction parameters and respective cross link densities were evaluated by the Flory-Rehner equation. While studying the mechanical behaviour, some distinguished theoretical models (e.g. Mooney-Rivlin, Flory, and Martin, Roth & Stiehler (MRS)) were tried to fit with the experimental results obtained during stress-stain analyses. In this process a few constants for cow Cr-tanned leather were derived as values of constant A in MRS equation remained in the range of 0.9-1.0, and value of constant B in Flory's equation remained in the range of 0.001-0.005, which had not been reported in the literature. The experimental results showed that the polyacrylate based syntan, bearing a higher level of free acrylic acid groups or a fewer proportion of esterified acrylic acid groups, formed better cross links with chrome-tanned bovine leather in comparison to other polyacrylate based syntans containing higher proportions of esterified acrylic acid groups. Moreover, high molecular weight polyacrylate based syntans provided better thermal and solvent resistance in comparison to low molecular weight polyacrylate based syntans. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Preparation of samples - Characterization
- RESULTS AND DISCUSSION : Intrinsic viscosity and molecular weight of polyacrylate syntans - Acid value and sap value of polyacrylate syntans - Mechanical properties - TGA - Swelling - Boiling testEn ligne : https://drive.google.com/file/d/1psllywRvovg1tNTD-1OHGP15SWqc6PM1/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30561
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 102, N° 2 (03-04/2018) . - p. 88-98[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19867 - Périodique Bibliothèque principale Documentaires Disponible Effects of mean particle size and addition weight percentage of CaCO3 on selected rheological properties of filled LDPE / Anthony C.-Y. Wong in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIII, N° 2 (05/2018)
[article]
Titre : Effects of mean particle size and addition weight percentage of CaCO3 on selected rheological properties of filled LDPE Type de document : texte imprimé Auteurs : Anthony C.-Y. Wong, Auteur ; A. C. M. Wong, Auteur ; C. K. M. Auyeung, Auteur Année de publication : 2018 Article en page(s) : p. 245-254 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Carbonate de calcium Le carbonate de calcium (CaCO3) est composé d'un ion carbonate (CO32-) et d'un ion calcium (Ca2+), sa masse molaire est de 100,1 g/mole.
C'est le composant principal du calcaire et de la craie, mais également du marbre. C'est aussi le principal constituant des coquilles d'animaux marins, du corail et des escargots.
Charges (matériaux)
Etat fondu (matériaux)
Granulométrie
Mesure
Poids
Polyéthylène basse densité
Polymères -- Additifs
Rhéologie
Taille des particules
ViscositéIndex. décimale : 668.4 Plastiques, vinyles Résumé : The present work reports the empirical findings of the effects of mean particle size and weight percentage of CaCO3 on selected rheological characteristics of filled LDPE. The experimental results indicated that the two parameters studied had noticeable influence on the selected rheological properties of LDPE. Studies on the slip velocity and critical shear stress based on Mooney analysis revealed that the designed benefits brought by the incorporation of additives (such as CaCO3) into a polymer (such as LDPE) may not be justified by their possible adverse effects. It is also shown in this report that melt index and apparent viscosity of the selected polymer systems were well correlated with mean particle size of CaCO3 and its weight percentage. Note de contenu : - EXPERIMENTAL PROCEDURE : Raw materials - Particle size classification and size measurements - Rheological properties measurements - Mixing process
- RESULTS AND DISCUSSIONS : Particle size and size distribution - Melt flow index (MFI) - Rheology characteristicsDOI : 10.3139/217.3490 En ligne : https://drive.google.com/file/d/1m_PU-cMMVxlGDHLhVPQ0T72tj0vqcTzl/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30577
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Code-barres Cote Support Localisation Section Disponibilité 19873 - Périodique Bibliothèque principale Documentaires Disponible Effects of polymer viscosity and nanofillers on morphology of nanofibers obtained by a gas jet method / J.-H. Shang in INTERNATIONAL POLYMER PROCESSING, Vol. XXIX, N° 1 (03/2014)
[article]
Titre : Effects of polymer viscosity and nanofillers on morphology of nanofibers obtained by a gas jet method Type de document : texte imprimé Auteurs : J.-H. Shang, Auteur ; R. E. Benavides, Auteur ; Sadhan C. Jana, Auteur Année de publication : 2014 Article en page(s) : p. 103-111 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Charges (matériaux)
Morphologie (matériaux)
Nanofibres
Nanoparticules
Nanotubes de carbone à parois multiplesUn nanotube de carbone multifeuillet est constitué de plusieurs feuillets de graphènes enroulés les uns autour des autres. Il existe deux modèles pour décrire la structure des nanotubes multifeuillets :
- le modèle poupée russe: les plans de graphène sont arrangés en cylindres concentriques ;
- le modèle parchemin: un seul feuillet de graphène est enroulé sur lui-même, comme une feuille de papier.
Poids moléculaires
Polyacétate de vinyle
Polyéthylène glycol
Polymères en émulsion
Polyvinylpyrrolidone
ViscositéIndex. décimale : 668.4 Plastiques, vinyles Résumé : This research evaluates the effects of molecular weight, polymer solution concentration, and carbon nanotube concentration on diameter distribution of polymer nanofibers produced with gas jet fiber (GJF) method. In GJF method, the shear and extensional forces of high-velocity gas jets are used to spin fibers from polymer solutions. The correlation between polymer molecular weight and fiber diameter distribution is studied along with the effect of multi-walled carbon nanotubes (MWCNT) on fiber diameter distribution. The paper also assesses how carbon nanotubes distribute in bi-component polymer nanofibers. It is found that polymer chain entanglement is a key determinant of fiber diameter. MWCNTs do not show preference for distribution in polyvinylidene pyrrole (PVP) and polyvinylacetate (PVAc) and instead appear on the surfaces of the fibers. A negative value of spreading coefficient supports this observation. Note de contenu : - Diameter and morphology of PEO nanofibers and microfibers by GJF method
- Effects of carbon nanotubes on single component polymer nanofibers
- Distribution of carbon nanotubes in bi-component polymer nanofibersDOI : 10.3139/217.2817 En ligne : https://drive.google.com/file/d/1wQGdWi-sDRXkW_ozpB3zMqdRxLSKRYqW/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20581
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Code-barres Cote Support Localisation Section Disponibilité 16006 - Périodique Bibliothèque principale Documentaires Disponible Effects of pressure and supercritical fluid on melt viscosity of LDPE in conventional and microcellular injection molding / C.-L. Hsu in INTERNATIONAL POLYMER PROCESSING, Vol. XXVII, N° 1 (03/2012)
PermalinkEffects of reprocessing cycles and ageing on the rheological and mechanical properties of virgin-recycled HDPE blends / Ridha Mnif in MATERIAUX & TECHNIQUES, Vol. 103, N° 7 (2015)
PermalinkEfficiency of emulsifier-free emulsions in delivering caffeine and a-tocopherol to human skin / Hichem Kichou in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 45, N° 3 (06/2023)
PermalinkEmpirical viscosity curve interpretation of silicone oils and polyisobutylène / D. Hadjistamov in LES CAHIERS DE RHEOLOGIE, Vol. XV, N° 1 (10/1996)
PermalinkEmulsification de crèmes cosmetiques par la methode de 'PIT' (température d'inversion) : l'influence des agents épaississants et huiles polaires / Thomas Förster in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 12, N° 5 (10/1990)
PermalinkPermalinkEngineering rheological response in chitosan-sophorolipid systems through controlled interactions / S. Pingali in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 42, N° 4 (08/2020)
PermalinkEnhancing the performance of ultra high-solids VAE emulsions / Randolph J. Lorenz in ADHESIVES AGE, Vol. 40, N° 11 (10/1997)
PermalinkEpoxidized polybutadiene : a novel prepolymer for cationically UV-curable coatings / F. Cazaux in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 66, N° 838 (11/1994)
PermalinkEstudio reologico de la mezcla rodrun-polipropileno / J. M. Lazcano in LES CAHIERS DE RHEOLOGIE, Vol. XVI, N° 1 (10/1998)
PermalinkEtude du comportement rhéologique des composites bois-polymères chargés de résidus papetiers / J. Soucy in RHEOLOGIE, Vol. 30 (12/2016)
PermalinkEtude des propriétés rhéologiques et des modifications structurales de protéines de maïs plastifiées en vue de leur impression 3D par dépôt de fil fondu / Laurent Chaunier in RHEOLOGIE, Vol. 33 (06/2018)
PermalinkEtude rhéologique des solutions aqueuses d'éthers cellulosiques à applications ophtalmiques et pharmaceutiques / E. Fabrègue in LES CAHIERS DE RHEOLOGIE, Vol. XIV, N° 2 (09/1995)
PermalinkEtude rhéologique de solutions micellaires de surfactants / Alain Ponton in LES CAHIERS DE RHEOLOGIE, Vol. XV, N° 1 (10/1996)
PermalinkEtude de la viscosité dynamique complexe de divers polypropènes. Application au calandrage / Vincent Verney / 1981
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