Characterization of yield stress and slip behaviour of skin/hair care gels using steady flow and LAOS measurements and their correlation with sensorial attributes / S. Ozkan in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 34, N° 2 (04/2012)  

[article]  inINTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 34, N° 2 (04/2012) . - p. 193-201 Titre : Characterization of yield stress and slip behaviour of skin/hair care gels using steady flow and LAOS measurements and their correlation with sensorial attributes Type de document : texte imprimé Auteurs : S. Ozkan, Auteur ; T. W. Gillece, Auteur ; L. Senak, Auteur ; David J. Moore, Auteur Année de publication : 2012 Article en page(s) : p. 193-201 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acide polyacrylique Analyse sensorielle Caractérisation Copolymères Cosmétiques Epaississants Gels -- Emploi en cosmétologie Maléique, Acide Polyvinyl éther Polyvinylpyrrolidone Rhéologie Tags : 'Gel  main/cheveux'  'Grande  amplitude  oscillatoire'  Rhéologie  'Corrélation  sensorielle'  'Limite  élasticité' Index. décimale : 668.5 Parfums et cosmétiques Résumé : Gels made with three different polymers widely used as rheology modifiers in cosmetic formulations (cross-linked poly(acrylic acid), cross-linked poly(maleic acid-alt-methyl vinyl ether) copolymer and cross-linked poly(acrylic acid-co-vinyl pyrrolidone) copolymer) were characterized by rheological and sensory evaluation methods to determine the relationship between sensorial perception and corresponding rheological parameters. Both conventional rheological characterization methods and a more recent method, Fourier Transform Rheology with Large Amplitude Oscillatory Flow data (LAOS), were utilized to characterize the material with and without wall slip. Sensorial analyses were implemented in vivo to evaluate the perceived ease of initial and rub-out spreadability, cushion, pick-up and slipperiness attributes of the gels. Results were statistically analysed by both variance (ANOVA) and principle component analysis (PCA). Sensorial panel testing characteristics discriminated the three materials, and PCA analyses revealed that sensory attributes could be well predicted by rheological methods. Rheological experiments, without wall slip, revealed that gel strength in the linear viscoelastic region (LVR) and yield stress of these materials are similar, but exhibit significantly different wall slip and thixotropy behaviour in the low shear rate region under wall slip conditions. Above the critical shear rate, which corresponds to the yield stress, all tested materials did not slip and behaved as conventional, shear thinning polymeric fluids. In particular, the rheological parameters and sensorial perception of the 1% cross-linked vinyl pyrrolidone/acrylic acid copolymer were significantly affected by wall slip and/or thixotropy-related shear banding phenomena. Note de contenu : - MATERIALS AND METHODS : Rheological characterization (dynamic oscillatory measurements - Steady torsional flow experiments - Continuous shear rate ramp tests - extensional tests) - Sensory evaluation - Data analysis - RESULTS AND DISCUSSION : Rheological characterization (steady torsional flow experiment - Continuous stress of shear rate ramp measurements to establish the shear rate dependency of shear stress and viscosity at different gap openings - Extensional tests - Sensory evaluation - Correlation of sensory ratings with conventional rheological parameters - Correlation of sensory ratings with large amplitude oscillaroty shear flow (LAOS) parameters (Chebyshev coefficients) DOI : 10.1111/j.1468-2494.2012.00702.x En ligne : https://onlinelibrary.wiley.com/doi/10.1111/j.1468-2494.2012.00702.x Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14392 [article]

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Development of styrenic copolymers for improving heat resistance of poly(methyl methacrylate) / K. Nishino in INTERNATIONAL POLYMER PROCESSING, Vol. XXXI, N° 3 (07/2016)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXXI, N° 3 (07/2016) . - p. 321-326 Titre : Development of styrenic copolymers for improving heat resistance of poly(methyl methacrylate) Type de document : texte imprimé Auteurs : K. Nishino, Auteur ; Y. Shindo, Auteur ; Y. Kurokawa, Auteur ; T. Takayama, Auteur ; Hiroshi Ito, Auteur Année de publication : 2016 Article en page(s) : p. 321-326 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alliages polymères Anhydride maléique Copolymères -- Propriétés mécaniques Copolymères -- Propriétés thermiques Copolymères styréniques Maléique, Acide Polyméthacrylate de méthyle Le poly(méthacrylate de méthyle) (souvent abrégé en PMMA, de l'anglais Poly(methyl methacrylate)) est un polymère thermoplastique transparent obtenu par polyaddition dont le monomère est le méthacrylate de méthyle (MMA). Ce polymère est plus connu sous son premier nom commercial de Plexiglas (nom déposé), même si le leader global du PMMA est Altuglas International9 du groupe Arkema, sous le nom commercial Altuglas. Il est également vendu sous les noms commerciaux Lucite, Crystalite, Perspex ou Nudec. Résistance thermique Rhéologie Viscoélasticité Index. décimale : 668.4 Plastiques, vinyles Résumé : Styrenic copolymers comprising styrene, methyl methacrylate, and maleic anhydride were developed to improve the heat-resistance property of poly(methyl methacrylate) (PMMA). The optical, thermal, and mechanical properties were examined for the blend specimens prepared by an injection-molding machine using melt-mixed samples. It was found that the copolymers, which were miscible with PMMA, increase the glass transition temperature and therefore the Vicat Softening temperature. Furthermore, the blends were completely transparent as similar to PMMA. Note de contenu : - Materials - Preparation of blends and moldings - Transparency - Dynamic viscoelastic properties - Capillary rheometer test - Thermal properties - Mechanical properties DOI : 10.3139/217.3180 En ligne : https://drive.google.com/file/d/1jSxxK1C7ht_kcQMIl3WiVuiyYKZUnDfI/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26644 [article]

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Improved interfacial properties of PA6/DE blends by DE-g-MAH prepared through ultrasound assisted extrusion / W. Bao in INTERNATIONAL POLYMER PROCESSING, Vol. XXIX, N° 3 (07/2014)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXIX, N° 3 (07/2014) . - p. 371-378 Titre : Improved interfacial properties of PA6/DE blends by DE-g-MAH prepared through ultrasound assisted extrusion Type de document : texte imprimé Auteurs : W. Bao, Auteur ; Hong Wu, Auteur ; T. Xie, Auteur ; S. Guo, Auteur Année de publication : 2014 Article en page(s) : p. 371-378 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adhésion Alliages polymères Alliages polymères -- propriétés mécaniques Chimie des surfaces Copolymères greffés Elastomères Essais dynamiques Maléique, Acide Matières plastiques -- Extrusion Peroxydes Polyamide 6 Taille des particules Ultrasons Index. décimale : 668.4 Plastiques, vinyles Résumé : In this paper, ultrasound was applied in extrusion reaction processing to graft an Elastomer (DE) with maleic anhydride (MAH), in order to improve the non-polarity of DE. Two types of DE-g-MAH were prepared by different methods and had similar grafting degree about 0.2 % and then they were added into the polyamide-6/elastomer (PA6/DE) blends, respectively. The effect of DE-g-MAH on the interfacial properties of PA6/DE blends was studied. The experimental results showed that, compared to the DE-g-MAH initiated by peroxide, DE-g-MAH initiated by ultrasound had better effect on refining the particle size of the dispersion phase and keeping the stability of the phase in the blends, which could be confirmed through SEM and Molau tests. When 5 % DE-g-MAH initiated by peroxide was added, the particle size of dispersion phase was 3.90 ?m, however, when 5 % DE-g-MAH initiated by ultrasound was added, the particle size of dispersion phase was 2.82 ?m. The results of TGA and mechanical tests showed the improved interfacial interaction and enhanced interfacial adhesion of the blend by adding DE-g-MAH, respectively. Note de contenu : - EXPERIMENTAL : Materials - Samples preparation - Measurement - RESULTS AND DISCUSSION : Fourier Transform Infrared Spectroscopy (FT-IR) of grafted products - Grafting degree - Molau test - Morphology of cryogenically-fractured surfaces of the blends - Thermogravimetric analysis - mechanical properties DOI : 10.3139/217.2816 En ligne : https://drive.google.com/file/d/1XFltYg6VlCzVwuQmpwHkV8CGHXorsV2f/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21735 [article]

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Synthesis and properties of sodium mono-alkylamide maleate surfactants / Fu Han in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 49, N° 4 (07-08/2012)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 49, N° 4 (07-08/2012) . - p. 340-342 Titre : Synthesis and properties of sodium mono-alkylamide maleate surfactants Type de document : texte imprimé Auteurs : Fu Han, Auteur ; Bao-Cai Xu, Auteur ; Zhi-Qiang Qu, Auteur ; Ya-Wen Zhou, Auteur ; Gui-Ju Zhang, Auteur Année de publication : 2012 Article en page(s) : p. 340-342 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alkylamides Maléique, Acide Surfactants -- Synthèse Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : The synthesis of a series of sodium mono-alkylamide maleate surfactants was described, and the surface activity properties of the surfactants were studied. The mono-alkylamide maleic acids were synthesized by amidation using primary aliphatic amine (lauryl, myristyl, cetyl) and maleic anhydride as starting material. They were structurally characterized by IR,1H-NMR and MS. The sodium mono-alkylamide maleate surfactants were prepared by neutralization of the precursor mono-alkylamide maleic acids with sodium hydroxide. They reduced the surface tension of water to 32– 34 mN × m–1at concentration levels of 10–4–10–3mol × L–1. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15555 [article]

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Thermophysical and functional-consumer qualities of shoe upper leather / Nataliia Pervaia in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 1 (01-02/2020)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 104, N° 1 (01-02/2020) . - p. 19-24 Titre : Thermophysical and functional-consumer qualities of shoe upper leather Type de document : texte imprimé Auteurs : Nataliia Pervaia, Auteur ; Olga Andreyeva, Auteur ; Lesia Maistrenko, Auteur ; Larysa Ocheretna, Auteur Année de publication : 2020 Article en page(s) : p. 19-24 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Propriétés mécaniques Cuirs et peaux -- Propriétés physiques Cuirs et peaux -- Propriétés thermiques Cuirs et peaux de bovins Maléique, Acide Perméabilité Porosité Résistance à la traction Résistance thermique Tige de la chaussure Vapeur d'eau Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Nowadays, the production of shoes having certain functional-consumer qualities requires materials, which meet all final product requirements, are environmentally safe and do not overcomplicate the production cycle. In this paper the influence of conditions of using a polymeric material based on maleic acid prior to dyeing the bovine shoe upper leather was studied. According to the results of electron microscopic examination, as well as evaluation of the physico-mechanical and thermophysical properties of the leather it was revealed that the use of polymeric material contributes to the formation of structure and such important indices of the derma as tensile strength, grain strength, extension, water vapour permeability, apparent density, porosity, heat resistance and thermal absorptivity. On the basis of a generalised objective function, optimal processing variants were defined. Recommendations of leather production parameters taking into account the season of shoe exploitation (autumn/winter, spring/summer) have been made. Note de contenu : - EXPERIMENTAL SECTION : Materials - Leather semi-ifinished product processing techniques - Research methods and equipment - RESULTS AND DISCUSSION : Crusting processes planning matrix - Table 1 : Variation intervals and levels of factors - Table 2 : Crusting processes planning matrix En ligne : https://drive.google.com/file/d/1Va3RwRsD7eUSc4oOwpONqicTwMW2rSNw/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33539 [article]

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Understanding adhesive joints' behavior / Possart Wulff in ADHESIVES AGE, Vol. 45, N° 3 (03/2002)  

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