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Structural and thermomechanical investigation of lyotropic liquid crystal phases doped with monodisperse microparticles / Alain Ponton in APPLIED RHEOLOGY, Vol. 24, N° 1 (2014)
[article]
Titre : Structural and thermomechanical investigation of lyotropic liquid crystal phases doped with monodisperse microparticles Type de document : texte imprimé Auteurs : Alain Ponton, Auteur ; C. Meyer, Auteur ; G. Foyart, Auteur ; L. Aymard, Auteur ; K. Djellab, Auteur Année de publication : 2014 Article en page(s) : 7 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Amidons
Calcaire
Cristaux liquides lyotropes
Dispersions et suspensions
Gommes et résines
Matériaux cimentaires
Particules (matières)
Stabilisants (chimie)Index. décimale : 532.05 Mécanique des fluides et des liquides - Dynamique (cinétique et cinématique) Résumé : We present a study of the structural and thermomechanical properties of lyotropic phase in the quasi ternary system made of Cetylpyridinium chloride (CPCI)/hexanol/salt water (0.9% by mass) with and without cobalt microparticles. Phase transition temperatures of the structural sequence isotropic L,/nematic calamitic Nc,/hexagonal H have been determined by differential scanning microcalorimetry. Temperature induced developable domains in hexagonal phase H and disclinations in calamitic nematic phase Nc, were observed in crossed polar optical microscopy in confined geometry. A rheological study of calamitic nematic phase NIc highlighted structuring effect of cobalt microparticles from a concentration of 2 % to be demon-strated by an increase in viscosity and viscoelastic moduli. This could be explained by a stabilization of disclinations. Note de contenu : - STUDIED MATERIALS AND EXPERIMENTAL METHODS : Sample preparation - Quasi-ternary system - Experimental methods
- RESULTS : Differential scanning microscopy - Analysis of defective macroscopic textures by optical microscopy - Shear rheologyRéférence de l'article : 14147 DOI : 10.3933/ApplRheol-24-14147 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21557
in APPLIED RHEOLOGY > Vol. 24, N° 1 (2014) . - 7 p.[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16175 - Périodique Bibliothèque principale Documentaires Disponible Study on photostabilization in situ of reactive hindered amine light stabilizers applied to UV-curable coatings / Yongtao Zhang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 4 (07/2012)
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Titre : Study on photostabilization in situ of reactive hindered amine light stabilizers applied to UV-curable coatings Type de document : texte imprimé Auteurs : Yongtao Zhang, Auteur ; Xiaoxun Liu, Auteur ; Zhixian Dong, Auteur ; Yanyan Cui, Auteur Année de publication : 2012 Article en page(s) : p. 459-466 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Amines Une amine est un composé organique dérivé de l'ammoniac dont certains hydrogènes ont été remplacés par un groupement carboné. Si l'un des carbones liés à l'atome d'azote fait partie d'un groupement carbonyle, la molécule appartient à la famille des amides. Découvertes en 1849, par Wurtz les amines furent initialement appelées alcaloïdes artificiels.
On parle d'amine primaire, secondaire ou tertiaire selon que l'on a un, deux ou trois hydrogènes substitués.
Par exemple, la triméthylamine est une amine tertiaire, de formule N(CH3)3.
Typiquement, les amines sont obtenues par alkylation d'amines de rang inférieur. En alkylant l'ammoniac, on obtient des amines primaires, qui peuvent être alkylées en amines secondaires puis amines tertiaires. L'alkylation de ces dernières permet d'obtenir des sels d'ammonium quaternaire.
D'autre méthodes existent : 1. Les amines primaires peuvent être obtenues par réduction d'un groupement azoture, 2. Les amines peuvent aussi être obtenues par la réduction d'un amide, à l'aide d'un hydrure, 3. L'amination réductrice permet l'obtention d'amines substituées à partir de composés carbonylés (aldéhydes ou cétones), 4. Les amines primaires peuvent être obtenues par la réaction de Gabriel.
Chimie -- Essais et réactifs
Photo-oxydation
Photodétérioration
Photostabilité
Réticulation (polymérisation)
Revêtements -- Détérioration
Revêtements -- Séchage sous rayonnement ultraviolet
Stabilisants (chimie)Index. décimale : 667.9 Revêtements et enduits Résumé : Four monomeric reactive hindered piperidinol derivatives, such as 4-methacryloyl-1,2,2,6,6-pentamethyl-piperidinyl (MPMP), 4-acryloyl-1,2,2,6,6-pentamethyl-piperidinyl (APMP), 4-methacryloyl-2,2,6,6-tetramethyl-piperidinyl (MTMP), and 4-acryloyl-2,2,6,6-tetramethyl-piperidinyl (ATMP), were applied as reactive hindered amine light stabilizers (r-HALS) in UV-curable coatings. The effect of r-HALS on the UV-curing kinetics of the UV-curable coatings of different monomers or oligomers has been previously investigated. Polymer coatings were prepared by means of UV-curing technology; experiments were conducted manually on photoaging indoors, monitoring the Yellowness Index (YI) in the photooxidation process, and adding r-HALS. The experiments were done to review its photoprotection effect on UV-cured coatings. Subsequently, they were compared with typical commercial HALS through parallel experiments to investigate the photooxidation aging mechanism of polymer coatings, and the effective concentration was determined from the changing circumstances of YI, thus comparing their differences in photostabilizing effect in situ of the polymer coatings. Note de contenu : - EXPERIMENTAL : Materials - UV-curing kinetics of the monomers/oligomers - Preparation of UV-curable coatings - Photooxidation of the coatings films
- RESULTS AND DISCUSSION : Effect of r-HALS on the UV-curing kinetics of the UV coatings - Photostabilizing efficiency of r-HALS - Comparison of photostabilizing effect between r-HALS and commercial HALSDOI : 10.1007/s11998-011-9385-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9385-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16004
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 9, N° 4 (07/2012) . - p. 459-466[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14189 - Périodique Bibliothèque principale Documentaires Disponible Sunscreens : maximising skin feel and performance / Jürgen Vollhardt in PERSONAL CARE EUROPE, Vol. 3, N° 1 (03/2010)
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Titre : Sunscreens : maximising skin feel and performance Type de document : texte imprimé Auteurs : Jürgen Vollhardt, Auteur ; Christine Mendrok-Edinger, Auteur Année de publication : 2010 Article en page(s) : p. 71-74 Langues : Anglais (eng) Catégories : Dioxyde de titane
Emulsifiants
Photostabilité
Produits antisolaires
Silicones -- Emploi en cosmétologie
Stabilisants (chimie)Index. décimale : 668.5 Parfums et cosmétiques Note de contenu : - Strategies to improve skin feel
- Synergistic mixtures and the use of silicon-based UV filters
- Optimising the amount of particulate filters such as organic/inorganic pigments
- Application of specific Emulsifier systems and emulsion structures
- Good photo-stability and formulation stabilityPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13493
in PERSONAL CARE EUROPE > Vol. 3, N° 1 (03/2010) . - p. 71-74[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012296 - Périodique Bibliothèque principale Documentaires Disponible 'Suntan' for coatings / Karl Bechtold in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 195, N° 4492 (09/2005)
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Titre : 'Suntan' for coatings Type de document : texte imprimé Auteurs : Karl Bechtold, Auteur Année de publication : 2005 Article en page(s) : p. 41-44 Langues : Anglais (eng) Catégories : Absorbeurs de rayonnement ultraviolet
Antioxydants
Automobiles -- Habitacles
Phénols
Résistance thermique
Revêtements -- Additifs
Stabilisant à la lumière de type amine encombrée
Stabilisants (chimie)Index. décimale : 667.9 Revêtements et enduits Résumé : The combination of different stabilisers as described above generated positive synergistic effects for the protection of interior coating against light and heat.
It could be shown that a stabiliser system consisting of UV-absorber and radical scavenger is good to excellent in exterior plastic coatings stabilisation - both in gloss retention and colour change behaviour.
Using the same - only light stabilisation - concept in car interior (soft feel) coatings is not sufficient to fulfill all demands. The addition of a small amount of a slow hydrolyzing phenolic antioxidant with low yellowing tendency can be advantageous to significantly reduce the colour development in heat-exposed coatings.Note de contenu : - PLASTICS, A MATERIAL OF THE FUTURE, ALSO IN THE AUTOMOTIVES INDUSTRY
- GIVING COATINGS SOME PROTECTIVE PROPERTIES
- THE 'SUN TAN LOTION' FOR COATINGS : UV-absorbers - Sterically hindered amines (HALS)
- PROTECTION FROM SUNLIGHT FOR EXTERIORS AND INTERIORS : Experimental conditions - Xenon weather-O-meter conditions
- TEST RESULTS OF ACCELARATED WEATHERING EXPOSURE AND HEAT EXPOSURE ON INTERIOR CAR PART SYSTEMS
- WHEN OUTSIDE AND INSIDE BECOME ONEPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27624
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 195, N° 4492 (09/2005) . - p. 41-44[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 002408 - Périodique Bibliothèque principale Documentaires Disponible Tackifying resin dispersions : more than just soap and water / George J. Kutsek in ADHESIVES AGE, Vol. 39, N° 7 (06/1996)
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Titre : Tackifying resin dispersions : more than just soap and water Type de document : texte imprimé Auteurs : George J. Kutsek, Auteur Année de publication : 1996 Article en page(s) : p. 24-30 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésifs -- Stockage
Adhésifs en phase aqueuse
Antimicrobiens
Antioxydants
Gommes et résines
Matières premières
Plastifiants
Procédés de fabrication
Rhéologie
Stabilisants (chimie)
SurfactantsIndex. décimale : 668.3 Adhésifs et produits semblables Résumé : Resin dispersions are widely used in water based adhesives to impart specific properties. A resin dispersion is a stable heterogeneous system of resin droplets in water. The resin phase is referred to as the dispersed, internal or discontinuous phase. The surrounding water is the external or continuous phase. The diameter of the resin droplets is less than one micron. Coalescence of the particles is prevented by the repulsive force arising from like surface charges on the particles. This charge is provided by the surfactant used to emulsify the resin. Surfactants are surface active agents that decrease interfacial tension and aid the process of emulsification.
Hydrocarbon resins are low-molecular-weight thermoplastic polymers derived from cracked petroleum distillates, terpene fractions, coal tar and a variety of pure monomers. They are neutral materials with [less than]1 acid number and [less than]2 saponification number. Naturally occurring rosins, rosin esters of aromatic and aliphatic alcohols, and polymerized rosins are also suitable for water-based tackifiers.
A dispersion must be selected that contains a resin suited to the latex polymer, and a dispersion system compatible with that of the latex. Base resin selection is most important, since it affects characteristics of the finished adhesive, including tack, wettability, plasticization and specific adhesion. Compatibility and temperature performance properties are major considerations in selecting a base resin. A less compatible resin may be selected if the high temperature performance it provides outweighs having a fully compatible resin.Note de contenu : - PHYSICAL PROPERTIES OF DISPERSIONS : Solids content - Particle size - Specific gravity - pH - Viscosity - Grit - Mechanical stability - Ion tolerance
- METHOD OF MANUFACTURE
- BATCH VS CONTINUOUS EMULSIFICATION
- RESIN : Hydrocarbon resins - Naturally occuring rosins - Wood rosin - Gum rosin - Tall oil rosin - Rosin esters
- ANTIOXIDANTS
- PLASTICIZERS
- SURFACTANTS : Anionic surfactants - Cationic surfactants - Amphoteric or zwitterionic surfactants - nonionics -
- PROTECTIVE COLLOIDS, THICKENERS AND ADDITIVES : Sodium carboxymethylcellulose - Gum arabic, gum karaya and guar gum - Methylcellulose - Polyvinyl alcohol - Starch - Casein - Polyacrylic acid salts
- BIOCIDES
- STABILITY : Steric stabilization - pH - Viscosity - Specific gravity - Particle size - Multivalent cations - Mechanical shear - Temperature - Loss of stabilizer - Surface evaporation - Biological - Intentional de-emulsification
- STORAGE AND HANDLING : Shipping - Bulk storage - Temperature - Piping - Pumps - Filtration - Sampling - ChemicalEn ligne : https://drive.google.com/file/d/1gPFYGhY18j6DZ3mkjsZ2GY5Euqh8vXUw/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20504
in ADHESIVES AGE > Vol. 39, N° 7 (06/1996) . - p. 24-30[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 001065 - Périodique Bibliothèque principale Documentaires Exclu du prêt Tailored diversity / Wolfgang Diegritz in KUNSTSTOFFE INTERNATIONAL, Vol. 103, N° 9 (09/2013)
PermalinkTextile applications of commercial photochromic dyes. Part 6 : photochromic polypropylene fibres / Anna F Little in COLORATION TECHNOLOGY, Vol. 132, N° 4 (08/2016)
PermalinkThe influence of natural gelling agents on the foaming behaviour and foam structure in surfactant systems / Gina marin Velasquez in SOFW JOURNAL, Vol. 146, N° 1-2 (01-02/2020)
PermalinkThe pre-treatment study of varied woods with high performance light stabilisers / Yung-Chi Yang in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 207, N° 4637 (12/2017)
PermalinkThe reaction mechanism between collagen and phenol/oxazolidine e tanning matrices / Chen Hui in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 93, N° 1 (01-02/2009)
PermalinkPermalinkUndertanding thickening stabilising polymers / Alicia Roso in PERSONAL CARE EUROPE, Vol. 3, N° 3 (09/2010)
PermalinkUnlocking the potential of carbon fibre / Adalberg Braig in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 199, N° 4538 (07/2009)
PermalinkUse of lipoprotein lipase in the improvement of some properties of wool fabrics in COLORATION TECHNOLOGY, Vol. 126, N° 5 (2011)
PermalinkUser-friendly UV / Zo-Hong Tsai in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 197, N° 4512 (05/2007)
PermalinkUtilization of carboxymethyl chitosan in cosmetics / A. Jimtaisong in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 36, N° 1 (02/2014)
PermalinkPermalinkVitamins for the circular economy / Rudolf Pfaendner in KUNSTSTOFFE INTERNATIONAL, Vol. 113, N° 3 (2023)
PermalinkWeather stabilization and pigmentation of UV-curable powder coatings / Misev Ljubomir in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 71, N° 891 (04/1999)
PermalinkA wetting and dispersing additives concept / Carsten Nagel in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 200, N° 4548 (05/2010)
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