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CO2-triggered hydrophobic/hydrophilic switchable waterborne polyurethane-acrylate with simultaneously improved water resistance and mechanical properties / Liangfeng Xu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 4 (07/2021)
[article]
Titre : CO2-triggered hydrophobic/hydrophilic switchable waterborne polyurethane-acrylate with simultaneously improved water resistance and mechanical properties Type de document : texte imprimé Auteurs : Liangfeng Xu, Auteur ; Zhaofei Wang, Auteur ; Gongwen Yang, Auteur ; Guobing Zhang, Auteur ; Haibing Wei, Auteur ; Huagao Fang, Auteur ; Yunsheng Ding, Auteur Année de publication : 2021 Article en page(s) : p. 989–998 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse thermique
Caractérisation
Copolymère uréthane acrylate
Méthacrylate de méthyle
Polymères -- Propriétés mécaniques
Polymères -- Synthèse
Polymères en émulsion
Polyuréthanes
Résistance à l'humidité:Résistance à l'eau
Revêtements -- Propriétés thermiques
Revêtements organiques
ThermogravimétrieIndex. décimale : 667.9 Revêtements et enduits Résumé : Traditional waterborne polyurethane (WPU) has poor water resistance because of the incorporation of permanent hydrophilic groups, such as carboxyl group or ammonium salt, into polymer chains. Therefore, developing WPU with excellent water resistance and mechanical properties is highly desirable for industrial applications. In this study, CO2-triggered hydrophobic/hydrophilic switchable waterborne polyurethane–acrylate (WPUA) containing methyl methacrylate (MMA) units were designed and synthesized. The molecular structure, hydrophobic/hydrophilic switchable behavior, water resistance, and mechanical properties were systematically investigated and characterized. The WPUA with 10 wt% MMA exhibited a low water uptake (2.15 wt%) and linear swelling ratio (0.17 L%), as well as a high tensile strength (16.7 MPa) and modulus (85.9 MPa), which were much higher than those of the pristine WPU. This study indicated that the CO2-triggered WPUA dispersed stably as latex particles in water and possessed excellent water resistance and mechanical properties after the film formation. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of WPU and WPUA emulsions - Preparation of WPU and WPUA films - Characterizations
- RESULTS AND DISCUSSION : Structures of WPU-pre, WPU, and WPUA filmsHydrophilic/hydrophobic switchable behaviors
of WPUA emulsions - Water resistance of WPU and WPUA films - Mechanical and thermal properties of WPU
and WPUA films - Thermal properties of WPU and WPUA films
- Table 1 : The compositions of WPU and WPUA emulsions
- Table 2 : The linear swelling ratio, water uptake, water contact angle, and gel content of WPU and WPUA
- Table 3 : Mechanical data of WPU and WPUA films
- Table 4 : TGA and DSC data of WPU and WPUA filmsDOI : https://doi.org/10.1007/s11998-021-00476-y En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00476-y.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36207
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 4 (07/2021) . - p. 989–998[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22969 - Périodique Bibliothèque principale Documentaires Disponible Le CO2 véritable matière première pour une chimie verte des polymères / Henri Cramail in L'ACTUALITE CHIMIQUE, N° 371-372 (02-03/2013)
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Titre : Le CO2 véritable matière première pour une chimie verte des polymères Type de document : texte imprimé Auteurs : Henri Cramail, Auteur ; Thierry Tassaing, Auteur Année de publication : 2013 Article en page(s) : p. 67-71 Note générale : Bibliogr. Langues : Français (fre) Catégories : Chimie écologique
Dioxyde de carbone
Polycarbonates
Polymères
Polymères -- Synthèse
PolyuréthanesIndex. décimale : 668.9 Polymères Résumé : En raison de son faible coût et de sa faible toxicité, le dioxyde de carbone est une source de carbone dans les procédés de synthèse industriels qui fait actuellement l'objet de recherches soutenues. Cela est illustré de manière spectaculaire par les millions de tonnes de CO2 consommées chaque année dans la production industrielle de l'urée. L'un des débouchés qui fait actuellement l'objet de nombreux travaux concerne l'utilisation du CO2 pour la synthèse de polymères, notamment les polycarbonates et les polyuréthanes. La synthèse industrielle actuelle de ces matériaux est principalement basée sur l'utilisation du phosgène, gaz hautement toxique. Parce que le CO2 fournirait une alternative au phosgène plus économique et moins toxique, des efforts considérables sont en cours pour développer des synthèses axées sur cette source de carbone. L'objectif de cet article est de faire une présentation générale des recherches menées actuellement sur le développement de procédés de synthèse originaux pour deux principales classes de polymères susceptibles de valoriser des quantités importantes de CO2 : les polycarbonates et les polyuréthanes.
Note de contenu : - La copolymérisation du CO2 avec les époxydes pour l'obtention de polycarbonates et de carbonates cycliques
- La synthèse de polyuréthanes à partir de bis-carbonates cycliques et de diamines
- Des polymères totalement verts à partir de synthons biosourcés ?En ligne : https://new.societechimiquedefrance.fr/numero/le-co2-veritable-matiere-premiere- [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17685
in L'ACTUALITE CHIMIQUE > N° 371-372 (02-03/2013) . - p. 67-71[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14754 - Périodique Bibliothèque principale Documentaires Disponible Combinatorial methods / Amitabha Ray Chaudhuri in PAINTINDIA, Vol. LVII, N° 11 (11/2007)
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Titre : Combinatorial methods : Application and scope in coatings development Type de document : texte imprimé Auteurs : Amitabha Ray Chaudhuri, Auteur Année de publication : 2007 Article en page(s) : p. 79-100 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chimie combinatoire
Criblage
Plan d'expérience
Polymères -- Synthèse
Revêtements
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : The success of combinatorial methodologies (i.e. automated and parallel workflows) in pharmaceutical research industries has shown the pathway of similar developments in materials science, especially in organic coatings. This review provides an overview of published combinatorial or high-throughput experimentation work in the area of polymeric coatings. Methodological aspects, experimentation examples, shortcomings and future challenges are discussed. Note de contenu : - Combinatorial method background
- Concept of combinatorial or high-throughput method
- High throughput experimentation in organic coating
- Components of a combinatorial workflow in organic coating : Experimental design - Polymer synthesis - Polymer screening - Coating preparation - Coating deposition
- Real-time perspectivesPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11528
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Code-barres Cote Support Localisation Section Disponibilité 010022 - Périodique Bibliothèque principale Documentaires Disponible Conductive polymers / Paresh Narendra Darshani in PAINTINDIA, Vol. LXIII, N° 2 (02/2013)
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Titre : Conductive polymers Type de document : texte imprimé Auteurs : Paresh Narendra Darshani, Auteur Année de publication : 2013 Article en page(s) : p. 85-91 Langues : Anglais (eng) Catégories : Anticorrosion
Antistatiques
Conducteurs organiques
Polyacétylène
Polyaniline
Polymères -- Propriétés électriques
Polymères -- Synthèse
Polymères en médecineIndex. décimale : 668.9 Polymères Résumé : Polymers (or plastics as they are also called) are known to have good insulating properties. Polymers are one of the most used materials in the modem world. Their uses and application range from containers to clothing. They are used to coat metal wires to prevent electric shocks.
This very narrow perspective is rapidly changing as a new class of Polymer known as Intrinsically conductive polymer or Electroactive polymers are being discovered.
The main class of polymers under these categories are:
. Polyacetylene
. Polyaniline
. Polypyrrole
Insulators, however, have tightly bound electrons so that nearly no electron flow occurs so they offer high resistance to charge flow. So for conductance free electrons are necessary.
In becoming electrically conductive, a polymer has to imitate a metal, that is, its electrons need to be free to move and not bound to the atoms. Polyacetylene is the simplest possible con jugated polymer. It is obtained by polymerisation of Acetylene.
Polymers may also have conductivities corresponding to those of semiconductors.
The conductivity of conductive polymers decreases with decreasing temperature in contrast to the conductivities of metals Conductive polymers have many uses like
. Anti-static substances for photographic film
. Corrosion Inhibitors
. Compact Capacitors
. Anti Static Coating
. Electromagnetic shielding for computers, "Smart Windows"
. Solar CellsNote de contenu : - INTRODUCTION : Conducting polymers- polymers which conduct electricity - Literature review (history)
- TYPES OF CONDUCTING POLYMERS : Band gap theory - Forbidden gap - Types of semiconductors
- HOW CAN POLYMER BECOME CONDUCTIVE ? : Conditions to make polymer conducting - Doping process
- SYNTHESIS AND PROCESSING OF CONDUCTING POLYMERS : Table 1 : List of conducting polymers, structure, their dopants and conductivities - Synthesis of polyacetylene - Synthesis of polyaniline (PANI) - Factors which affect conductivity of polymer - Applications - Electrical applications - Medical applications - Anti-static coatings - Corrosion resistance - Some other applications - Future prospectsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18847
in PAINTINDIA > Vol. LXIII, N° 2 (02/2013) . - p. 85-91[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15212 - Périodique Bibliothèque principale Documentaires Disponible Correlative studies on the properties of rubber seed and soybean oil-based alkyd resins and their blends / Ikhazuagbe H. Ifijen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 2 (03/2021)
[article]
Titre : Correlative studies on the properties of rubber seed and soybean oil-based alkyd resins and their blends Type de document : texte imprimé Auteurs : Ikhazuagbe H. Ifijen, Auteur ; Hamilton D. Odi, Auteur ; Muniratu Maliki, Auteur ; Stanley O. Omorogbe, Auteur ; Aireguamen I. Aigbodion, Auteur ; Esther U. Ikhuoria, Auteur Année de publication : 2021 Article en page(s) : p. 459-467 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Formulation (Génie chimique)
Huile de graine de caoutchouc
Huile de soja
Mélanges (chimie)
Polyalkydes
Polyesters
Polymères -- Synthèse
Revêtements organiques
Rhéologie
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : This study aims at synthesizing alkyd resins from rubber seed oil (RSO), soybean oil (SBO), and their blends via the monoglyceride route. Oil extracted from rubber seeds was blended with soybean oil at various blending ratios (80:20, 70:30, 50:50, 30:70, and 10:90). Thereafter, the blends were employed in the synthesis of polyesters (alkyd resins) via alcoholysis technique. The alkyd samples synthesized from the RSO, SBO, and their respective blends were characterized for comparative purpose. The RSO-/SBO-based alkyds and aforementioned blends have iodine values of 157.90/142.00, 152.44, 149.90, 143.16, 142.26, and 142.41 gI2/100 g and saponification values of 216.21/228.61, 203.67, 171.04, 161.97, 142.89, and 135.62 mgKOH/g, respectively. The drying property (set-to-touch time and the tack free) of the 100% RSO-based alkyd resin did not experience any significant improvement as the blending proportion of SBO in RSO increases. The tack-free and dry-through times for the blends were estimated to be around 129–133 and 236–243 min, respectively. Huggins and Kraemer viscosity relationship was used to extrapolate the intrinsic viscosities of the RSO- and SBO-based alkyds and their corresponding blends. The blends showed resistance to brine, water, and acid. However, only some exhibited fair resistance to alkali. The results from the investigation revealed that the alkyds prepared using a blend of RSO/SBO oil possess coating properties whose values are comparable to those of commercial polyesters. However, the studied SBO cannot be considered as good blending oil with RSO for the preparation of alkyd for the improvement of drying properties. Note de contenu : - MATERIALS AND METHODS : Synthesis of alkyd resin samples - Characterization of the alkyd samples - Chemical constituent of RSO and SBO - Preparation of alkyd coatings for performance characteristics - Viscosity measurement
- RESULTS AND DISCUSSION : Physiochemical characteristics of the alkyd samples - Drying characteristics of the alkyd films - Viscosity analysis
- Table 1 : Formulation of the synthesized alkyd resin
- Table 2 : Physiochemical properties of the RSO and SBO
- Table 3 : Physico-chemical properties of RSO and SBO alkyd resin
- Table 4 : Drying schedule for formulated alkyd resin
- Table 5 : Chemical resistance of the alkyd film to different solvent media
- Table 6 : Estimated solution parameters of alkyd samples
- Scheme 1 : Monoglyceride process of rubber seed oil-modified alkyd synthesis
- Scheme 2 : Monoglyceride process of soybean oil-modified alkyd synthesisDOI : https://doi.org/10.1007/s11998-020-00416-2 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00416-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35607
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 2 (03/2021) . - p. 459-467[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22701 - Périodique Bibliothèque principale Documentaires Disponible Corrosion protection ability of hydrophobic zinc based coordination polymers on mild steel surface in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 3 (05/2023)
PermalinkCorrosion protection of benzoxazine and cardanol-doped polyaniline coatings / Raiane Valenti Gonçalves in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 2 (03/2022)
PermalinkCorrosion protection of mild steel by nano-colloidal polyaniline/nanodiamond composite coating in NaCl solution / Habib Ashassi-Sorkhabi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 3 (05/2014)
PermalinkCosmetic properties of comb-like PU film-formers / Claudio Pirovano in PERSONAL CARE EUROPE, Vol. 9, N° 2 (04/2016)
PermalinkCyclodextrin-based hyperbranched polyester: synthesis, characterization, and antimicrobial activity / Swaminathan Prabu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 5 (09/2018)
PermalinkDevelopment of bio-based polyester-urethane-acrylate (PUA) from citric acid for UV-curable coatings / Debarati Maity in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 3 (05/2023)
PermalinkDevelopment of nanocomposites with self-cleaning properties for textile and leather / Concepcio Casas in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 1 (01-02/2018)
PermalinkDevelopment of topcoat formulations to extend the open time of waterborne coatings / Wouter M. J. Kloosterman in SURFACE COATINGS INTERNATIONAL, Vol. 106.4 (07-08/2023)
PermalinkDiagramme TTT isotherme de la polymérisation anionique du PA6 à partir de l'e-caprolactame / Céline Vicard in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 28, N° 1 (01-02-03/2018)
PermalinkDSC and TGA characterization of free and surface water of colloidal unimolecular polymer (CUP) particles for coatings applications / Peng Geng in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 1 (01/2021)
PermalinkDye incorporated nanopolymers and their application to leather wastewater : a study of removal of Cr(III) ions in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 4 (07-08/2016)
PermalinkEco-friendly coating materials based on renewable resources / Dhrubajyoti Kumar in PAINTINDIA, Vol. LXV, N° 7 (07/2015)
PermalinkEcofriendly primers based on very short oil novel alkyd / Mrs. P. P. Chahande in PAINTINDIA, Vol. LVII, N° 11 (11/2007)
PermalinkEffect of cross-linking density on coating properties of a polyurea coating system / M. A. Shenoy in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 89, B3 (09/2006)
PermalinkEffect of humidity on curing of alkoxysilane-functionalized alkyd coatings / Brittany Pellegrene in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
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