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[article]
Titre : Reactive extrusion of TPU : Production of thermoplastic polyurethanes with reduced carbon footprint Type de document : texte imprimé Auteurs : Aleksandra Buczko, Auteur ; Andrei Holzer, Auteur ; Simon Kemmerling, Auteur Année de publication : 2020 Article en page(s) : p. 43-45 Langues : Anglais (eng) Catégories : Extrusion réactive
Formaldéhyde
Formulation (Génie chimique)
Matières plastiques -- Extrusion
Polymères -- Synthèse
Polyols
Polyuréthanes
Thermoplastiques -- ExtrusionIndex. décimale : 668.4 Plastiques, vinyles Résumé : The simple replacement of petroleum-based components with renewable alternatives in a well-established reactive extrusion process is a promising route to more environmentally friendly thermoplastic polyurethane elastomers (TPU). However, this requires a comprehensive understanding of the interactions between chemical reactions and material flow within an extruder, as well as a thorough understanding of the effects of heat and shear on polymerization and melt processing. Note de contenu : - Advantages of reactive extrusion
- Novel polyol in classic TPU
- From the REX concept to the pilot process
- Use of sustainable polyols in the established REX process
- Figure : Extruded strand from the continuous synthesis of a thermoplastic polyurethand, containing the new paraformaldehyde-based polyol
- Fig. 1 : Thermoplastic polyurethand synthesized using the newly developed polyol based on paraformaldehyde core. The solvent cast foil has excellent transparency
- Fig. 2 : Development steps within "Dream Polyols" : from the preliminary determination of the polyurethane formulation and the REX conditions to the implementation of newly developed components in the established processing approach
- Fig. 3 : Determining the physical and chemical causes of the instabilities in reactive extrusion allows the dosing strategy and the processing wxindow to be adjusted, resulting in a well-controlled process
- Fig. 4 : Molecular weight and dispersity of thermoplastic polyurethane produced by the REX process. The polymer performance is controlled by a simple adjustment of the material formulationEn ligne : https://drive.google.com/file/d/1hqkeI-eieybWTmsT6QqYGCLpRAbvpo94/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34637
in KUNSTSTOFFE INTERNATIONAL > Vol. 110, N° 8 (2020) . - p. 43-45[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22305 - Périodique Bibliothèque principale Documentaires Disponible Recent advances in antireflective coatings for solar application / Kunal V. Yeole in PAINTINDIA, Vol. LXXI, N° 4 (04/2021)
[article]
Titre : Recent advances in antireflective coatings for solar application Type de document : texte imprimé Auteurs : Kunal V. Yeole, Auteur Année de publication : 2021 Article en page(s) : p. 62-78 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cellule polymère photovoltaïque
Centrifugation
Conducteurs organiques
Photopiles
Polymères -- Synthèse
Polymères conjugués
Revêtement antireflet
Revêtements organiques
Sol-gel, ProcédéIndex. décimale : 667.9 Revêtements et enduits Résumé : The increase in energy production costs for fossil fuels has led to a search for an economically viable alternative energy source. One alternative energy source of particular interest is solar energy. A promising alternative to inorganic materials is organic semiconductor polymer solar cells due to their advantages of being cheaper, light weight, flexible and made into large areas by roll-to-roll processing. However, the conventional architecture that is typically used for fabricating solar cells requires high vacuum to deposit the top metal electrode which is not suitable for roll-to-rolI processing. Anti-reflective coatings (ARCs) have evolved into highly effective reflectance and glare reducing components for various optical and opto-electrical equipments. Extensive research in optical and biological reflectance min im ization as wel I as the emergence of nanotechnology over the years has contributed to the enhancement of ARCs in a major way. In this review the prime objective is to give a comprehensive idea of the ARCs right from their inception, as they were originally conceptualized by the pioneers and lay down the basic concepts and strategies adopted to minimize reflectance. Antireflective coatings for solar cover glasses and photocatalytic coatings for self-cleaning glasses are two types of nano-functionalized thin films, which are extensively investigated at present. Note de contenu : - INTRODUCTION : Solar cells - Basic principles - Requirements for perfect antireflective coatings - Sol-gel technology - Sol-gel chemistry
- AR COATING BY SOL-GEL PROCESS : Multi-layer AR on glass plate - Inhomogeneous layer on glass - AR on solar cell - Coating on plastic substrate - Synthesis of conjugated polymers - Poly(p-phenylenevinylene) and its derivatives - Cyano-containing poly(p-phenylenevinylene)s - Carbazole-based conjugated polymers - N-type conjugated polymers - Coating and printing techniques - Casting - Spin coating - Doctor blading - Screen printing - Inkjet printing
- APPLICATION : Conclusion and future scopeEn ligne : https://drive.google.com/file/d/1LT_nID-sKwMZkF_YDEp1hrVfkFE5z4Yf/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35955
in PAINTINDIA > Vol. LXXI, N° 4 (04/2021) . - p. 62-78[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22766 - Périodique Bibliothèque principale Documentaires Disponible Recent advances in polyurethane dispersion from renewable resources : A review / Kunal V. Yeole in PAINTINDIA, Vol. LXVIII, N° 4 (04/2018)
[article]
Titre : Recent advances in polyurethane dispersion from renewable resources : A review Type de document : texte imprimé Auteurs : Kunal V. Yeole, Auteur Année de publication : 2018 Article en page(s) : p. 53-62 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dispersions et suspensions
Epoxydation
Huiles et graisses végétales
Polymères -- Synthèse
Polymères en émulsion
Polyuréthanes
Rayonnement ultraviolet
Ressources renouvelables
Réticulation (polymérisation)Index. décimale : 667.9 Revêtements et enduits Résumé : Exploring renewable materials to replace petroleum-based building blocks for advanced coatings has been a major thrust area for researchers for the development of eco-friendly and sustainable products. For the last few decades, there has been significant interest among coating researchers around the world to design water-based polyurethane dispersions (PUDs) that can be cured at ambient conditions. Polyurethanes are the most versatile polymers, exhaustive studies have been reported and more details of all aspects of their properties and uses are given. Vegetable oil-based polyurethanes are used in various fields from coatings to elastomers including smart biomaterials. This paper comprises overview in recent developments on the preparation of biobased polyols from plant oils, covering from the general epoxidation as welI as to high light the properties of polyurethanes obtained from them. Note de contenu : - History and key development of waterborne polyurethane
- Polyurethane dispersions
- Effect of soft segment on PUD
- Effect of hard segment on PUD
- Anionic polyurethane dispersion
- Cationic polyurethane dispersion
- Synthetic process for waterborne polyurethane (WPU) dispersion : Two-component WPU coatings
- The vegetable oil
- Synthesis of vegetable oil-based polyols through reactions involving the ester groups
- Synthesis of vegetable oil-based polyols through reactions involving C-C double bonds
- Synthesis of vegetable oil-based polyols by polymerization of C-C double bonds and subsequent hydrolysis of ester groups
- Synthesis of fatty acid-based polyols
- UV-curable PUD
- Preparation of ultraviolet curable waterborne polyurethane dispersions
- FIGURES : 1. Schematic representation of PUD architecture - 2. Schematic representation of a) cationic and b) anionic PUD in water - 3. Formulas and structures of the most important fatty acids - 4. Functionalization of triglyceride molecules via epoxidation - 5. Schematic representation of triol structure prepared by polycondensation of hydroformylated oleic acid and trimethylolpropane - 6. Examples of renewable raw molecules in photochemistryEn ligne : https://drive.google.com/file/d/15HKyaWKiiY7mWH6BeQqrJIEzCV0GO2Co/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30698
in PAINTINDIA > Vol. LXVIII, N° 4 (04/2018) . - p. 53-62[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19992 - Périodique Bibliothèque principale Documentaires Disponible Recent developments in biobased epoxy resin from natural resources and reacton kinetics : a review / V. L. Kakde in PAINTINDIA, Vol. LXIX, N° 2 (02/2019)
[article]
Titre : Recent developments in biobased epoxy resin from natural resources and reacton kinetics : a review Type de document : texte imprimé Auteurs : V. L. Kakde, Auteur Année de publication : 2019 Article en page(s) : p. 79-82 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse thermique
Biomatériaux
Epoxydes
Huile de karanja et constituants
Huiles et graisses végétales
Polymères -- Synthèse
Réactions chimiques organiques
Réticulation (polymérisation)
Stabilité thermiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : Natural oils contains high percentage of unsaturated fatty acid and can be converted into epoxy fatty acid by epoxidation process. The Natural oil was first epoxidized using hydrogen peroxide (H202) and acetic acid. Epoxidized natural oils has emerged as an interesting concept as they obtained from sustainable, renewable natural resoui ce and are environmental friendly. For the curing purpose the epoxidized oils are also treated with a biobased acid such as citric acid (CA) and tartaric acid (TA) forming Bioepoxy CA and Bioepoxy TA. A thermogravimetric analysis revealed that thermal stability of bioepo) CA and bioepoxy TA resins were comparable with the petroleum based epoxy resins trimethylolpropane triglycidyl ethi based (P1-epoxy) and bisphenol-A diglycidyl ether based (P2-epoxy). The aim of the review is to study the kinetics of th, reaction involving d uring Epoxidation and Curing process. Note de contenu : - Vegetable oils : structure, composition, properties
- Composition and properties
- Reaction mechanism
- Kinetics of epoxidation
- Curing reaction kinetic mechanism : Gel permission chromatography (GPC) - Thermo-gravimetric analysis of bioepoxy resin
- Fig. 1 : Epoxidatin side reactions
- Fig. 2 : Synthesis scheme of bioepoxy resin from karanja oilEn ligne : https://drive.google.com/file/d/1GrP_ibB6-XCcdh3ckMcID_PRXRz0ieML/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31956
in PAINTINDIA > Vol. LXIX, N° 2 (02/2019) . - p. 79-82[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20676 - Périodique Bibliothèque principale Documentaires Disponible Research progress of cationic acrylic cathodic electrodeposition coatings / Wanting Zhao in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 211, N° 4668 (04/2021)
[article]
Titre : Research progress of cationic acrylic cathodic electrodeposition coatings Type de document : texte imprimé Auteurs : Wanting Zhao, Auteur ; Shusen Cao, Auteur ; Xiaolong Chen, Auteur ; Lijun Chen, Auteur Année de publication : 2021 Article en page(s) : p. 48-51 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dépôt électrolytique
Polyacryliques
Polymères -- Synthèse
Polymères cationiques
Primaire (revêtement)
Réticulation (polymérisation)
Revêtements décoratifs
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : When considering energy saving and environmental protection, the emergence of cathodic electrodeposition coatings was a huge development in the coatings industry. In this paper, the principles of the synthesis of acrylic resin are introduced, development of cathodic electrodeposition coatings both domestic and overseas are described, and the development trends of cationic acrylic cathodic electrodeposition coatings are discussed.
Note de contenu : - SYNTHESIS OF ACRYLIC RESIN : Selecting monomers - Methods of creating a cation - Crosslinking way
- DEVELOPMENT OF CATHODIC ELECTRODEPOSITION COATINGS : DOMESTIC AND OVERSEAS
- DEVELOPMENT TREND OF ACRYLIC CATHODIC ELECTROPHORETIC COATINGS : Environmentally friendly cathodic electrophoresis coatings - Low temperature curing type of cathodic electrodeposition coatings - UV curable cathodic electrodeposition coatings - "primer-topcoat in one" cathodic electrodeposition coatings - Marginal corrosion-resistant type of cathodic electrodeposition coatings - High decorative cathodic electrodeposition coatings
- Table 1 : Development of cathodic electrodeposition coatings overseasEn ligne : https://drive.google.com/file/d/1-rmgnMC5z0wUlQjOBP5au5CUdO-Xyzco/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36764
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 211, N° 4668 (04/2021) . - p. 48-51[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23121 - Périodique Bibliothèque principale Documentaires Disponible Réseaux polymères interpénétrés à base de polyuréthannes et de polymères acryliques, synthèse et propriétés / Dang Thi Anh-Tu
PermalinkReview of eco friendly green polyurethanes with non-isocyanates : current and future trends in green coatings / R. Kanchana in PAINTINDIA, Vol. LXVII, N° 7 (07/2017)
PermalinkA review on room-temperature self-healing polyurethane : synthesis, self-healing mechanism and application / Yupeng Li in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 4 (Année 2022)
PermalinkReview on synthesis of isocyanate free polyurethane using sustainable routes and its applications / Bhagyashree Waghmare in PAINTINDIA, Vol. LXIX, N° 5 (05/2019)
PermalinkPermalinkRobust and flexible transparent protective film fabricated with an ambient-curable hybrid resin / Haitao Liu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 4 (07/2021)
PermalinkA scalable process for the generation of durable easy-to-clean coatings on foils / Alexander S. Münch in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 6 (11/2019)
PermalinkPermalinkLes silicones accèdent à l'âge adulte / Frédéric Tourneur in PLASTIQUES & CAOUTCHOUCS MAGAZINE, N° 867 (06/2009)
PermalinkSuper-structural 2D ultrathin carbon nitride/acrylate boron silane polymer with multi-function for enhancing antifouling performance / Yakun Li in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 4 (07/2021)
PermalinkSuperhydrophilic multifunctional antifogging coatings based on triethoxysilyl-terminated poly(N-vinylpyrrolidone) / Fangfei Meng in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 6 (11/2023)
PermalinkSurface tension studies in colloidal unimolecular polymers / Ashish Zore in COATINGS TECH, Vol. 18, N° 2 (02/2021)
PermalinkSynthèse et application de polymères fonctionnels à structure poreuse pour la chimie combinatoire / Anthony Mercier in L'ACTUALITE CHIMIQUE, N° 9 (09/2000)
PermalinkPermalinkSynthèse, caractérisation et propriétés de polyubutadienes contenant des ions monovalents ou divalents / Makhlouf Lalet / 1983
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