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Ambient temperature and UV-cured hybrid coatings from acetoacetylated non-isocyanate polyurethanes / H. R. Asemani in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 2 (03/2021)
[article]
Titre : Ambient temperature and UV-cured hybrid coatings from acetoacetylated non-isocyanate polyurethanes Type de document : texte imprimé Auteurs : H. R. Asemani, Auteur ; V. Mannari, Auteur Année de publication : 2021 Article en page(s) : p. 469-488 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acétoacétate
Caractérisation
Essais (technologie)
Matériaux hybrides
Michael, Addition deL'addition de Michael ou réaction de Michael est une réaction qui permet la création de liaisons carbone-carbone, voire de liaisons carbone-soufre. Il s'agit de l'addition nucléophile d'un carbanion sur un composé carbonylé α,β insaturé (aldéhyde, cétone et même ester α,β insaturé, des nitriles et des amides α,β insaturés pouvant aussi être utilisés). Elle appartient à la famille des additions nucléophiles conjuguées.
Cette réaction doit son nom au chimiste américain Arthur Michael.
Oligomères
Photoréticulation
Polymères -- Synthèse
Revêtements -- Séchage sous rayonnement ultraviolet
Revêtements organiques
Revêtements sans isocyanates
RhéologieIndex. décimale : 667.9 Revêtements et enduits Résumé : Preparation of ambient and UV curing non-isocyanate polyurethane (NIPU) coatings has been reported using a series of acetoacetylated non-isocyanate polyurethane (AA-NI-PUPO) oligomers. Synthesized oligomers were characterized using various techniques such as Fourier transform infrared and nuclear magnetic resonance spectroscopy. AA-NI-PUPOs showed significantly lower viscosity compared to their non-acetoacetylated counterparts. Ambient temperature-cured systems were formulated by mixing AA-NI-PUPOs and different primary amine compounds in stoichiometric proportions. Michael addition reaction of acrylates and AA-NI-PUPOs was initiated by UV curing using a photobase generator as the catalyst. NIPU coatings were studied for various thermo-mechanical properties and corrosion resistance. The selected UV-cured and ambient-cured samples showed instant and 1-h tack-free time, respectively. Results revealed that with proper selection of acetoacetylated resin and crosslinker type, coatings with properties comparable to conventional PU coatings could be formulated. Moreover, UV-curable coatings with up to 90 wt% solid could be formulated using conventional monomeric acrylates as a reactive diluent. The study demonstrates the feasibility of formulating solvent-free rapid ambient curing non-isocyanate polyurethane coatings. Note de contenu : - MATERIALS AND METHODS : Materials - Synthesis of oligomers - Preparation of coating compositions - Test methods
- RESULTS AND DISCUSSION : Characterization of AA-NI-PUPOs - Viscosity measurements - Curing characterization of UV-NIPUs - Cured-film properties
- Table 1 : List of acronyms used to identify oligomers and coating systems
- Table 2 : Characteristics of different resins used in this study (Mn: number average molecular weight, AA : acetoacetate)
- Table 3 : Screening results for A-NIPU coating samples
- Table 4 : Screening results for UV-NIPU coating samples
- Table 5 : Extended coating properties for selected A-NIPU coating samples
- Table 6 : Extended coating properties for selected UV-NIPU coating samples
- Table 7 : Tg, Td5% and Td50% values obtained from DSC and TGA analyses for selected NIPU coating samplesDOI : https://doi.org/10.1007/s11998-020-00425-1 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00425-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35608
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 2 (03/2021) . - p. 469-488[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22701 - Périodique Bibliothèque principale Documentaires Disponible Amphiphilic hyperbranched polymers : synthesis, characterization and self-assembly performance / Ren Longfang in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 2 (Année 2020)
[article]
Titre : Amphiphilic hyperbranched polymers : synthesis, characterization and self-assembly performance Type de document : texte imprimé Auteurs : Ren Longfang, Auteur ; Qiaoxuan Niu, Auteur ; Jing Zhao, Auteur ; Taotao Qiang, Auteur Année de publication : 2020 Article en page(s) : 12 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation
Composés amphiphiles
Encapsulation
Polymères -- Synthèse
Polymères amphiphiles
Systèmes auto-assemblésIndex. décimale : 668.9 Polymères Résumé : A series of amphiphilic hyperbranched polymers (AHP-s, the “s” refers to the algebra of AHP) were synthesized by the reaction between hydroxyl-terminated hyperbranched polymers (HBP-s, the “s” refers to the algebra of HBP) and palmitoyl chloride. FTIR, NMR and GPC were used to determine the structure of AHP-s, the results showed that AHP-s exhibits core-shell structure. The thermal properties of polymers were investigated by DSC and TGA. It was found that AHP-2, AHP-3 and AHP-4 display higher thermal stability than AHP-1 (AHP-1, AHP-2, AHP-3 and AHP-4 represent the first, second, third and fourth generation AHP, respectively). Furthermore, the self-assembly performance of AHP-s in THF solvent was investigated by TEM and SEM. Finally, the encapsulation capacity of the AHP-s for methyl orange (MO) was explored at different concentrations of AHP-s and pH conditions. It was found that AHP-s is capable of accommodating hydrophilic guest MO. Moreover, the higher generation of AHP-s, the stronger encapsulation capacity obtained. And the encapsulation capacity closely associated with the pH of encapsulation system. Note de contenu : - EXPERIMENTAL SECTION : Materials - Synthesis of amphiphilic hyperbranched polymers (AHP-s) - Characterization - Self-assembly experimental method in THF - Methodology for dye extraction phase transfer processes - Phase transfer experiment under different pH
- RESULTS AND DISCUSSION : Characterization of amphiphilic hyperbranched polymers - Thermal properties of amphiphilic hyperbranched polymers - Self-assembly of amphiphilic hyperbranched polymers in THF - Phase transfer mechanism - Phase transfer mechanism under different pHDOI : https://doi.org/10.1186/s42825-019-0015-7 En ligne : https://link.springer.com/content/pdf/10.1186/s42825-019-0015-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37328
in JOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 2 (Année 2020) . - 12 p.[article]Amphiphilic marine coating systems of self-stratified PDMS-PEG surfaces with an epoxy-polyurethane matrix / AliReza Rahimi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 3 (05/2022)
[article]
Titre : Amphiphilic marine coating systems of self-stratified PDMS-PEG surfaces with an epoxy-polyurethane matrix Type de document : texte imprimé Auteurs : AliReza Rahimi, Auteur ; Morgan Murphy, Auteur ; Kinza Faiyaz, Auteur ; Shane J. Stafslien, Auteur ; Lyndsi J. Vander Wall, Auteur ; Madhura Pade, Auteur ; John A. Finlay, Auteur ; Anthony S. Clare, Auteur ; Dean C. Webster, Auteur Année de publication : 2022 Article en page(s) : p. 795-812 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Carbamate de glycidyle
Copolymère silicone-uréthane
Epoxydes
Essais (technologie)
Formulation (Génie chimique)
Revêtements antisalissures
Revêtements autostratifiants
Revêtements organiques
Salissures biologiques
StatistiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : Marine coatings protect submerged surfaces from the negative effects of biofouling. In this work, we demonstrate a new method to prepare self-stratified, amphiphilic glycidyl-carbamate (GC)-based (epoxy urethane-based) coatings (AmpSiGC coatings) that have fouling-release properties making them suitable for marine use. The prepared coating systems are unique and durable in character as the bulk coating takes advantage of both epoxy and urethane functionalities while the surface is comprised of both hydrophilic and hydrophobic domains, granting it an amphiphilic characteristic. The experimental approach aimed to evaluate several factors that influence coating performance, including molecular weight of poly (ethylene glycol) (PEG) and PDMS moieties, ratio of hydrophobic (PDMS) and hydrophilic (PEG) components in the system, and the effect of different curing agents. The results demonstrated that polymeric chains of 10,000 Mn PDMS and 750 Mn PEG at 10–15 wt.% each offer substantially improved or comparable fouling-release performance in comparison to commercial marine coatings. This paper reports on the facile synthesis and characterization of the GC resin and GC prepolymers using FTIR and epoxy titrations ; surface characterization of the coatings using ATR-FTIR, XPS, and AFM; and fouling-release assessment of the surfaces using laboratory biological assays with the barnacle Amphibalanus amphitrite, the algae Ulva linza and Navicula incerta, and the bacteria Cellulophaga lytica. Several of the AmpSiGC coatings exhibited promising performance, which were better or comparable to the internal and commercial reference coatings. The performance of the systems was dependent on all of the factors considered in this study. Note de contenu : - Materials
- Design of experiments
- Synthesis of glycidyl-carbamate resin
- Synthesis of amphiphilic glycidyl-carbamate prepolymers
- Epoxy equivalent weight titrations
- Percent solids determination
- Fourier transform infrared spectroscopy
- Coating formulation and curing
- Surface characterization
- Biological laboratory assays
- Statistical analysis
- Table 1 : Coating compositions
- Table 2 : Epoxy equivalent weight for GC resin and some prepolymersDOI : https://doi.org/10.1007/s11998-021-00561-2 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00561-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38072
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 3 (05/2022) . - p. 795-812[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23605 - Périodique Bibliothèque principale Documentaires Disponible Amphiphilically modified self-stratified siloxane-glycidyl carbamate coatings for anti-icing applications / AliReza Rahimi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 1 (01/2021)
[article]
Titre : Amphiphilically modified self-stratified siloxane-glycidyl carbamate coatings for anti-icing applications Type de document : texte imprimé Auteurs : AliReza Rahimi, Auteur ; Morgan Murphy, Auteur ; Vinod Upadhyay, Auteur ; Kinza Faiyaz, Auteur ; Dante Battocchi, Auteur ; Dean C. Webster, Auteur Année de publication : 2021 Article en page(s) : p. 83-97 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Carbamate de glycidyle
Epoxydes
PolydiméthylsiloxaneLe polydiméthylsiloxane —[O-Si(CH3)2]n—, ou poly(diméthylsiloxane) selon la nomenclature systématique, communément appelé PDMS ou diméthicone, est un polymère organominéral de la famille des siloxanes souvent présent dans les shampoings. On l'y ajoute pour augmenter le volume des cheveux mais il peut également aller boucher les pores du cuir chevelu et rendre les cheveux gras. C'est une des raisons pour lesquelles se laver les cheveux tous les jours est très déconseillé avec un shampooing contenant des silicones.
Il existe également de l'amodiméthicone, qui est un dérivé du diméthicone.
Le polydiméthylsiloxane est un additif alimentaire (E900), utilisé comme antimoussant dans les boissons (Coca-Cola BlāK).
La chaîne de poly(diméthylsiloxane) forme également la structure de base des huiles et des caoutchoucs silicones.
Polyéthylène glycol
Polymères amphiphiles
Polyuréthanes
Revêtements antigel
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Icephobic coatings have applications in many industries to protect surfaces from deterioration and avoid catastrophic incidents. In this work, we report a new strategy to prepare amphiphilic siloxane-glycidyl carbamate coatings (AmpSiGC) coatings with anti-icing property. Polydimethyl siloxane (PDMS) and poly(ethylene glycol) (PEG) provided amphiphilicity for the AmpSiGC coatings. The designed experiment considered several factors: molecular weight of the surface-modifying polymers and their amount in the coating system. Although amphiphilic coatings have demonstrated promising results as marine coatings, investigations on their icephobic applications have been limited. This work discusses three aspects of the developed AmpSiGC systems: (1) preparation of the incorporated ingredients and their characterization by Fourier transform infrared spectroscopy (FTIR); (2) surface characterization of coatings via ATR (attenuated total reflectance)-FTIR, X-ray photoelectron spectroscopy (XPS), and atomic force microscopy (AFM); and (3) ice-adhesion, electrochemical impedance spectroscopy (EIS), and mechanical property evaluations. Overall, the surface analysis indicated the presence of both hydrophobic and hydrophilic domains and most of the coatings demonstrated promising performance for anti-icing applications with desirable barrier and mechanical properties in comparison to controls. Note de contenu : - EXPERIMENTAL : Design of experiments - Materials - Synthesis of glycidyl carbamate resin - Epoxy equivalent weight titrations - Percent solids determination - Fourier transform infrared spectroscopy - Coating formulaton & curing - Icephobic characterization - Statistical analysis - Surface characterization - Water absorption and barrier performance - Mechanical tests
- RESULTS AND DISCUSSION : GC resin and prepolymers - Contact angle - Ice adhesion - XPS - ATR-FTIR - AFM images - Water absorption and barrier properties - Mechanical properties
- Table 1 : Coating compositions
- Table 2 : Epoxy equivalent weight for GC resin and some prepolymersDOI : https://doi.org/10.1007/s11998-020-00402-8 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00402-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35353
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 1 (01/2021) . - p. 83-97[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22605 - Périodique Bibliothèque principale Documentaires Disponible An acrylic resin retanning agent with a reinforcing effect - Synthesised by hihg solids content microemulsion copolymerization / Wang Xuechuan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 4 (07-08/2005)
[article]
Titre : An acrylic resin retanning agent with a reinforcing effect - Synthesised by hihg solids content microemulsion copolymerization Type de document : texte imprimé Auteurs : Wang Xuechuan, Auteur ; An Huari, Auteur ; Sun Ming, Auteur ; Luo Yanhong, Auteur ; Feng Jianyan, Auteur Année de publication : 2005 Article en page(s) : p. 164-168 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de tannage
Caractérisation
Copolymères en émulsion
Croûte (cuir)On entend par "cuir en croûte" des cuirs ayant subi les opérations jusqu'au tannage, à l'exclusion de toute opération de corroyage ou de finissage, mais qui, par opposition aux wet-blue ont été séchés.
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux de porcs
Granulométrie laser
Haut extrait sec
Latex
Microémulsions
Polyacryliques
Polymérisation en émulsion
Retannage
Tannage organique
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : An acrylic resin nano-size latex whose colloidal particle size was about 20nm and solids content about 25% was prepared by a high solids content semicontinuous microemulsion copolymerization. The experimental product was employed in retanning drop [bottom] splits of pigs aiming to reinforce the leather. The offer of cross-linking agent and functional monomer were varied in the copolymerization experiment and their effect on the reinforcing function was investigated. The effect of colloidal particle size and dosage of nano-size latex on the reinforcing function also was verified.
The particle size of the latex was tested with a laser particle size analyzer, and the composition of the copolymer was analyzed by infrared spectrometry. Multifunction material test equipment was used in the physical testing of the retanned leather.
The result of the experiment showed: when the dosage of divinylbenzene (DVB) was 1.2% and the dosage of acrylic acid (AA) 0.8%, the reinforcing performance was the highest. When the colloidal particle size decreased from 64.2nm to 16.3nm, the reinforcing effect was also enhanced.
The tensile strength increased by 68%, and the tear strength improved 44% after the drop splits of pigs were retanned with 2% acrylic resin nano-size latex (with respect to the shaved wet blue weight). The effect of the dosage of sodium lauryl sulphate (SLS), n-pentanol (PA), ammonium persulfate (ASP) and AA on the colloidal particle size was also studied.Note de contenu : - EXPERIMENTAL DETAILS : Materials - Synthesis
- APPLICATION OF NANO-SIZE LATEX IN RETANNING CHROME TANNED PIG DROP SPLITS : Characterization
- RESULTS AND DISCUSSION : Colloidal particle size of the microemulsion copolymer - The IR spectra of BA/MMA/DVB copolymers prepared by microemulsion copolymerization - The effect of functional monomer on the reinforcing function - The effect of cross-linking agent on the reinforcing function - The effect of colloidal particle size on the reinforcing function - The relationship between dosage of retanning agent and reinforcing effect
- Table 1 : Recipes used in the series of experiments and average particle size of synthesized latexes
- Table 2 : Process details for the retanning applications of nano-size latex on wet blue pig drop splitsEn ligne : https://drive.google.com/file/d/1GoIENUWkqhu85g-LTxdP-0cZzXD-IvPo/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39249
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