Accueil
Catégories
Ajouter le résultat dans votre panier Affiner la recherche
Etendre la recherche sur niveau(x) vers le bas
Novel thermal and photo curable anti-reflective coatings using fluoroelastomer nanocomposites and self-assembly of nanoparticles / Konstantinos Kourtakis in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 5 (09/2016)
[article]
Titre : Novel thermal and photo curable anti-reflective coatings using fluoroelastomer nanocomposites and self-assembly of nanoparticles Type de document : texte imprimé Auteurs : Konstantinos Kourtakis, Auteur ; Paul Bekiarian, Auteur ; Gregory Blackman, Auteur ; Mark Lewittes, Auteur ; Shekhar Subramoney, Auteur Année de publication : 2016 Article en page(s) : p. 753-762 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Essais dynamiques
Fluoroélastomères
Formulation (Génie chimique)
Matériaux -- Propriétés fonctionnelles
Nanoparticules
Photoréticulation
Réaction de couplage
Résistance à l'abrasion
Revêtement antireflet:Peinture antireflet
Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques
Revêtements -- Propriétés optiques:Peinture -- Propriétés optiques
Silanes
SiliceLa silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux.
La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...).
Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale.
Systèmes auto-assemblésIndex. décimale : 667.9 Revêtements et enduits Résumé : We describe novel optical coatings which require either thermal or photocuring to render them mechanically robust and abrasion resistant. These new coatings are low refractive index fluoroelastomer-nanoparticle composites that form a unique nanostructure during drying of the liquid coating. During drying, the nanoparticles in these liquid coatings migrate towards the substrate. The final, 100-nm-thick anti-reflective coatings are novel and exhibit a unique bilayer structure in which the nanoparticles are ordered and segregated towards the substrate. The coatings are rapidly cured using a new process and exhibit surprising “scratch durability” as measured by aggressively testing with steel wool. Sol gel chemistry is used which involves the reaction of the nanoparticles with an acrylic oxysilane to form nanoparticles which are functionalized with sol gel derived oligomers. The functionalized nanoparticles are combined with a fluoroelastomer containing a free radical initiator and multiolefinic crosslinker, and the composite film is rapidly cured by a thermal or UV process at low temperatures. The final product is a mechanically robust, low refractive index anti-reflective film which is useful for displays and photovoltaic devices. These are unique fluoropolymer nanocomposites which utilize nanoparticle self-assembly to enhance important properties. Note de contenu : - EXPERIMENTAL METHODS : Fluoroelastomer matrix polymer - Coating compositions : composites with fluoroelastomer and silica nanoparticles - Thermally cured formulations -Phothchemically cured formulations - Coating process by reverse microgravure - Optical measurements of cured films - Abrasion testing - Software analysis to determine abrasion resistance - Nanoscratch test for abrasion resistance - High-resolution microscopy
- RESULTS AND DISCUSSION : Nanoparticle and silane coupling agents - Fluoroelastomer nanocomposites : impact of silica nanoparticles and silane coupling agent - Formulation of bilayer structureDOI : 10.1007/s11998-016-9785-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9785-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27112
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 5 (09/2016) . - p. 753-762[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 18316 - Périodique Bibliothèque principale Documentaires Disponible Optimized synthesis of highly reactive UV-curable hyperbranched polyester acrylates / Sacha Pérocheau Arnaud in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
[article]
Titre : Optimized synthesis of highly reactive UV-curable hyperbranched polyester acrylates Type de document : texte imprimé Auteurs : Sacha Pérocheau Arnaud, Auteur ; Payam Hashemi, Auteur ; Petra Mischnick, Auteur ; Tobias Robert, Auteur Année de publication : 2020 Article en page(s) : p. 127-143 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Esterification
Mesure
Photoréticulation
Polyacrylates
Polyesters
Polymères -- Propriétés mécaniques
Polymères -- Synthèse
Polymères ramifiés
Polyols
Rayonnement ultraviolet
Relations structure-propriétésIndex. décimale : 667.9 Revêtements et enduits Résumé : Highly reactive radical polyester acrylates are widely used as UV-curing binder resins for printing inks, coatings, and materials for additive manufacturing. Especially for the latter, polyesters with low viscosities are of high interest, as they allow for UV-curing materials with reduced amounts of reactive diluents to adjust the viscosity. One possibility to obtain polyester acrylates with low viscosities is the synthesis of hyperbranched structures, as the interactions of the polymer chains are reduced in comparison to their linear counterparts. In this study, an optimized synthetic protocol is described to obtain a set of highly branched polyester acrylates with a high degree of acrylation, without the use of activated reagents like anhydrides or acid chlorides that are usually employed to synthesize these products. Different cores and number of pseudo-generations of 2,2-bis(hydroxymethyl)propionic (bisMPA) are utilized to study the structure–property relationship of this class of polyesters. Comprehensive characterization of the synthesized resins and cured materials revealed high reactivities and good mechanical properties compared to similar materials reported in the literature. The design of the structure significantly influences the properties, allowing for the synthesis of specific resins with a wide range of potential applications. Note de contenu : - Material
- Synthesis of acrylated hyperbranched polyesters first generation
- Synthesis of acrylated hyperbranched polyesters second generation
- Curing
- MeasurementDOI : 10.1007/s11998-019-00247-w En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00247-w.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33733
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 1 (01/2020) . - p. 127-143[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 21517 - Périodique Bibliothèque principale Documentaires Disponible Photocationic-curable powder coatings / Z. Boncza-Tomaszewski in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 89, B2 (06/2006)
[article]
Titre : Photocationic-curable powder coatings Type de document : texte imprimé Auteurs : Z. Boncza-Tomaszewski, Auteur ; A. Bankowska, Auteur ; P. Penczek, Auteur Année de publication : 2006 Article en page(s) : p. 157-161 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Epoxydes
Formulation (Génie chimique)
Photoamorceurs (chimie)
Photoréticulation
Polyaddition
Polyesters insaturésLes résines de polyesters insaturés (UP) sont obtenues par polycondensation
d’un ou de plusieurs diacides avec un ou plusieurs glycols, l’un, au moins, des constituants contenant une double liaison éthylénique susceptible de réagir ultérieurement sur un composé vinylique, acrylique ou allylique.
Par le terme résine polyester, on désigne en fait la dissolution du prépolymère polyester insaturé dans un solvant copolymérisable, le plus utilisé étant le styrène. C’est sous cette forme liquide que les résines polyesters sont livrées aux transformateurs.
Après addition de différents adjuvants, charges et renforts, divers procédés de transformation provoquent, sous l’action d’un système catalytique approprié, la copolymérisation finale de la résine en un objet thermodurcissable.
Les polyesters insaturés sont d’un usage relativement ancien (1950), essentiellement
dans le bâtiment (moulage au contact). Ils ont connu un renouveau important à partir de 1980, en particulier au niveau des formulations et de la fiabilité des procédés grâce au développement de technologies industrielles de moulage par injection et par compression dans l’industrie automobile.
Revêtements -- Séchage sous rayonnement ultraviolet
Revêtements poudre:Peinture poudreIndex. décimale : 667.9 Revêtements et enduits Résumé : The UV-curable powder coatings allow the finishing of temperature-sensitive substrates such as wood, MDF (medium-density fibreboard), plastics and paper. The binder system is mostly comprised of unsaturated polyester, a vinyl ether and acrylic polyurethane. The curing mechanism consists of free radical polymerisation of the double bonds.
In comparison with free radical UV curing, the cationic-initiated UV-curing technology offers the advantages of insensitivity to oxygen and lower film shrinkage. Epoxides are one of the most important and widely used classes of resins in the field of cationic UV-curable powder coatings. Epoxy systems do not require any additional curing agent, they cure within seconds and have unlimited working times.
For photocationic curable powder coatings, solid epoxy resins have been used. However, such a system has some disadvantages: the epoxy value is too low to obtain sufficient cross-link density. This problem may be overcome by the use of a binder having more epoxide rings in the oligomer structure (eg epoxypolyesters). In the present study, a series of solid epoxypolyesters were prepared by polycondensation of glycols, tetrahydrophthalic anhydride and dicyclopentadiene, followed by the epoxidation of the double bonds in unsaturated polyester. The epoxypolyesters were subject to photoinitiated cationic polymerisation. The evaluation of the film performance was also carried out. The coatings prepared from these epoxypolyesters exhibited good hardness, impact strength and adhesion.Note de contenu : - STATE-OF-THE-ART : Chemistry of UV-curing coatings - Cationic mechanism
- DISCUSSION
- EXPERIMENTAL : Processing procedure for solid unsaturated resin - Processing procedure of epoxidation - Preparation of powder coating formulation
- Table 1 : Unsaturated polyester properties
- Table 2 : Epoxy polyester properties
- Table 3 : Cationic UV-curable clear powder coating formulation
- Table 4 : Properties of the cationic UV-curable powder coatingsDOI : 10.1007/BF02699645 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699645.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5386
in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 89, B2 (06/2006) . - p. 157-161[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 004796 - Périodique Bibliothèque principale Documentaires Disponible
[article]
Titre : Photocurable adhesives : 10 tips for best performance Type de document : texte imprimé Année de publication : 1997 Article en page(s) : p. 67-70 Langues : Américain (ame) Catégories : Adhésifs -- Séchage sous rayonnement ultraviolet
Photoréticulation
Réticulation (polymérisation)
Réticulation à l'humiditéIndex. décimale : 668.3 Adhésifs et produits semblables Résumé : Although they've been around almost as long as the Rolling Stones, ultraviolet- and lightcuring adhesives are now coming into their own as a value-added replacement for traditional adhesives and other fasteners in many assembly processes.
Collectively known as photocurable adhesives, UV- and light-cure adhesives have become essential to many high-tech assembly operations where high throughput and delicate components are the norm, according to Colin McLean, research associate, Ablestik Electronic Materials and Adhesives, Rancho Dominguez, Calif., which is owned by National Starch and Chemical Co., Bridgewater, N.J. Two other photocurable adhesive and coating suppliers owned by National Starch, Permabond of Englewood, N.J., and Emerson & Cuming Specialty Polymers of Lexington, Mass., say that OEMs and other assemblers are switching to light cure products for new or refurbished production lines that need lower temperature curing and faster setting adhesives and coatings.
Generally, the term photocurable denotes adhesives that cure when exposed to ultraviolet light, visible light or a combination of both. Traditional adhesives rely on chemical reactions initiated by heat, solvent evaporation, mixing of multiple components or other chemical conditions, like the presence of moisture, metal ions or the absence of oxygen to effect a cure. Photocurable adhesives require the presence of the correct wavelengths of light at sufficient intensity to form durable structural bonds.
UV- and light-cure adhesives use photoinitiators to activate the cure. Light energy is absorbed by photoinitiators in the adhesive formulation, causing them to fragment into highly reactive species that are able to polymerize or crosslink with other components of the formulation. In acrylate-based adhesives, the reactive species formed in the initiation step are known as free radicals. Another type of photoinitiator, a cationic salt, is used to polymerize epoxy functional resins, generating an acid that reacts to create the cure.Note de contenu : - Get the right formulation for the job
- What light source is required?
- Do you have the correct lamp?
- Account for the substrates
- Consider dual-cure systems for shadowed areas
- Use a radiometer to measure light output in the curing system
- Fix the position of the lamp
- Account for post-cure effects
- Profile the curing system
- Choose a supplier that can optimize the processEn ligne : https://drive.google.com/file/d/14SNdz3sH17NiyMXOwAwT5iHREZ1nNxDr/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20476
in ADHESIVES AGE > Vol. 40, N° 12 (11/1997) . - p. 67-70[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 001082 - Périodique Bibliothèque principale Documentaires Exclu du prêt Photocuring and photostabilisation of coatings for outdoor use / Sonia Megert in SURFACE COATINGS INTERNATIONAL. PART A : COATINGS JOURNAL, Vol. 87 A, 06 (07/2004)
[article]
Titre : Photocuring and photostabilisation of coatings for outdoor use Type de document : texte imprimé Auteurs : Sonia Megert, Auteur ; M. Koehler, Auteur ; Daniel Rogez, Auteur ; M. Burglin, Auteur ; A. Litzler, Auteur Année de publication : 2004 Article en page(s) : p. 254-260 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bois -- Revêtements
Oxydes de bisacylphosphine
Photoréticulation
Photostabilité
Réticulants
Revêtements en phase aqueuse -- Additifs
Revêtements en phase aqueuse -- Séchage sous rayonnement ultraviolet
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : At present, ultraviolet (UV)-cured coatings are mainly used indoors. Typical applications are funiture finishes and coatings on paper or plastics. There are question marks over whether photocured coatings are sufficiently durable for long-term outdoor use. Note de contenu : - BAPO photoinitiator
- UV-curable coatings for outdoor use : Composite laminates for outdooruse - Factory-applied UV-curable wood coatings
- Experimental evaluation : UV-curable exterior wood coatings - Experimental evaluation
- Table 1 : Through-curing and pendulum hardness of a top coat containing UV absorbers
- Table 2 : Investigation of three different WB coatings with BAPOEn ligne : https://drive.google.com/file/d/19XQ9Ayn8-mBFCgialJVKbGOqt3rHc0e0/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37512
in SURFACE COATINGS INTERNATIONAL. PART A : COATINGS JOURNAL > Vol. 87 A, 06 (07/2004) . - p. 254-260[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 14255 - Périodique Bibliothèque principale Documentaires Disponible Photocuring in a different light / Bernd Strehmel in EUROPEAN COATINGS JOURNAL (ECJ), N° 9 (09/2012)
PermalinkPhotoinitiation of multifunctional acrylates via ferrocene-alkyl chloride charge transfer complexes / Julie A. Anderson in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 1 (03/2007)
PermalinkPhotoinitiator design for LED fast cure / Susan E. Bailey in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 206, N° 4626 (11/2016)
PermalinkPhotopolymers for rapid prototyping / R. Liska in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 4 (12/2007)
PermalinkPhotoreactivity study of photoinitiated free radical polymerization using Type II photoinitiator containing thioxanthone initiator as a hydrogen acceptor and various amine-type co-initiators as hydrogen donors / Yung-Chung Chen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 1 (01/2021)
PermalinkPipeline transmitters and production timelines : Meeting the demands of two harsh environments / Uske Thorsten in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 26, N° 1 (01/2019)
PermalinkPolyacroléines anioniques photosensibles / Danielle Gulino
PermalinkPrecise dosing for medical wearables / Sebastian Schmitt in ADHESION - ADHESIVES + SEALANTS, Vol. 20, N° 3/2023 (2023)
PermalinkPreparation and characterization of a novel ultraviolet/thermal dual-curing thiol-ene/polyurethane acrylate coating / Dijun Huang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 4 (07/2021)
PermalinkPreparation and characterization of ultraviolet (UV) radiation curable resin from palm oil / H. D. Rozman in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 6 (11/2016)
PermalinkPreparation and evaluation of a UV-curing hydrophilic semi-IPN coating for medical guidewires / Wenfei Ding in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 4 (07/2021)
PermalinkPreparation and properties of UV-cured epoxy acrylate/glycidyl-POSS coatings / Ying Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 3 (05/2017)
PermalinkPreparation, characterization, and antibacterial activity of photocured thymol-doped acrylic resins / Micaela Degli Esposti in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 3 (05/2013)
PermalinkPreparation of 2,5-bis(methylallyl thioester)-thiadiazole with high refractive index and its coatings / Shuqian Zhou in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 6 (11/2017)
PermalinkPreparation of polyurethane acrylate-based titanium dioxide pigment and its use in blue light-curable ink / Chenlong Wang in COLORATION TECHNOLOGY, Vol. 137, N° 4 (12/07/2021)
Permalink