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Preparation and performance of waterborne polyurethane modified by cross-linking of aziridine/carboxylated multi-walled carbon nanotubes / Ma Xingyuan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 4 (07-08/2020)
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Titre : Preparation and performance of waterborne polyurethane modified by cross-linking of aziridine/carboxylated multi-walled carbon nanotubes Type de document : texte imprimé Auteurs : Ma Xingyuan, Auteur ; Wu Xiaozhen, Auteur ; Ding Bo, Auteur ; He Yuanxin, Auteur ; He Yinghua, Auteur ; Zheng Silong, Auteur Année de publication : 2020 Article en page(s) : p. 196-200 Note générale : Bibliogr.ZAZ Langues : Anglais (eng) Catégories : Allongement à la rupture
AziridineL'aziridine (n.f.) ou azacyclopropane est le composé organique cyclique de formule brute C2H5N. Elle est aussi le composé parent des aziridines et du groupe fonctionnel qui correspond à un hétérocycle à trois côtés composé d'une amine et de deux groupes méthylène.
Caractérisation
Carboxylation
Couches minces -- Propriétés mécaniques
Cuir
Essais (technologie)
Greffage (chimie)
Humidité -- Absorption:Eau -- Absorption
Nanotubes de carbone à parois multiplesUn nanotube de carbone multifeuillet est constitué de plusieurs feuillets de graphènes enroulés les uns autour des autres. Il existe deux modèles pour décrire la structure des nanotubes multifeuillets :
- le modèle poupée russe: les plans de graphène sont arrangés en cylindres concentriques ;
- le modèle parchemin: un seul feuillet de graphène est enroulé sur lui-même, comme une feuille de papier.
Polymères en émulsion
Polyuréthanes
Résistance à l'humidité:Résistance à l'eau
Résistance à la traction
Réticulation (polymérisation)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Carboxylated multi-walled carbon nanotubes (MWCNT-COOH) were prepared by treating multiwalled carbon nanotubes (MWCNT) with concentrated sulfuric acid (H,SO4) and concentrated nitric acid (HNO3) at a volume ratio of 3:1. Afterwards, taking MWCNT-COOH as the modified materials and aziridine (AZ) as the cross-linking agents were added to polyether-based waterborne polyurethane (WPU) thus preparing waterborne polyurethane modified by cross-linking of aziridine/carboxylated multi-walled carbon nanotubes (AZ-MWCNT-COOH-WPU) emulsion and films. The latter was applied to the surface treatment of natural leather and synthetic leather and other coating materials. The effects of different AZ contents on the water resistance and mechanical properties of AZ-MWCNT-COOH-WPU films were analysed and are discussed. The synthesised product was characterised by FTIR, XRD, SEM and other detection methods. The results showed that AZ successfully grafted MWCNT-COOH to the molecular chain of WPU and, when the content of AZ increased, the tensile strength of AZ-MWCNT-COOH-WPU film increased, firstly from 14.8MPa to 21.8MPa and then decreased to 12.1MPa. Elongation at break decreased from 570.2% to 198.4%, the water absorption decreased from 108.9% to 2.4% thus the water resistance was enhanced. Note de contenu : - EXPERIMENTAL PROCEDURE : Experiment materials and instrubments - Preparation of MWCNT-COOH - Preparation of AZ-MWCNT-COOH-WPU emulsion - Preparation of AZ-MWCNT-COOH-WPU film - Characterisation and test methods
- RESULTS AND DISCUSSIONS : FTIR analysis of MWCNT-COOH - Mechanical properties of AZ-MWCNT-COOH-WPU films - Water resistance analysis of AZ-MWCNT-COOH-WPU films - SEM analysis of AZ-MWCNT-COOH-WPU filmsEn ligne : https://drive.google.com/file/d/1-LHZ2ykQRApgvR0NWf-_GkwPDD_IfZWI/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34333
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 104, N° 4 (07-08/2020) . - p. 196-200[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21881 - Périodique Bibliothèque principale Documentaires Disponible Preparation and performances of cationic waterborne polyurethane coating co-modified with acrylic and amino acid / Guankun Kuang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)
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Titre : Preparation and performances of cationic waterborne polyurethane coating co-modified with acrylic and amino acid Type de document : texte imprimé Auteurs : Guankun Kuang, Auteur ; Yan Liu, Auteur ; Ying Qin, Auteur ; Tianhao Lu, Auteur ; Binjie Xin, Auteur Année de publication : 2024 Article en page(s) : p. 879-892 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acides aminés Les acides aminés (ou aminoacides) sont une classe de composés chimiques possédant deux groupes fonctionnels : à la fois un groupe carboxyle –COOH et un groupe amine –NH2. Parmi ceux-ci, les acides α-aminés se définissent par le fait que leur groupe amine est lié à l'atome de carbone adjacent au groupe acide carboxylique (le carbone α), ce qui leur confère la structure générique H2N–CHR–COOH, où R représente la chaîne latérale, qui identifie l'acide α-aminé.
Les acides α-aminés jouent un rôle fondamental en biochimie comme constituants élémentaires des protéines : ils polymérisent en formant des liaisons peptidiques qui aboutissent à de longues chaînes macromoléculaires appelées peptides.
Polyacryliques
Polymères cationiques
Polymères en émulsion
Polyuréthanes
Revêtements -- Propriétés mécaniques
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Acrylic acid is commonly used to modify anionic waterborne polyurethanes, and little research has been done on the modification of cationic waterborne polyurethanes. In this study, the effect of acrylic acid addition at different levels on the performance of cationic waterborne polyurethanes was investigated. The experimental results showed that the stability, and chemical resistance of cationic waterborne polyurethane coatings were improved with the addition of acrylic acid, which has the advantages of better chemical resistance, high stability and low price, and the hardness of the coating gradually increased and the adhesion decreased with the increase of acrylic acid content, therefore, the acrylic acid content of 21% was the most suitable. In addition, the effect of amino acids as neutralizing agents on the performance of cationic waterborne polyurethane coatings was also explored. The addition of amino acids helped the cationic waterborne polyurethane to form a reticular crosslinked structure, and the experimental results showed that the mechanical properties of the cationic waterborne polyurethane coatings were greatly improved. Compared with the commonly used acids (hydrochloric acid and acetic acid), amino acids have the advantage of being environmentally friendly and non-toxic, which is more conducive to the industrial production and application of cationic waterborne polyurethane coatings. Note de contenu : - PREPARATION : Materials - Synthesis of CWPUA emulsion - Preparation of membrane - Preparation of tinplate coating - Characterization of the dispersibility of CWPUA emulsions - Structural and morphological characterization of CWPUA coatings - Characterization of water resistance properties of CWPUA coatings - Thermal stability characterization of CWPUA coatings - Characterization of mechanical properties of CWPUA coatings - Characterization of chemical resistance of CWPUA coatings - Other performance tests of CWPUA coatings
- RESULTS AND DISCUSSION : Dispersibility of CWPUA emulsions - FTIR spectra of CWPUA film - Water resistance of CWPUA coatings - Thermal properties of CWPUA coatings - Mechanical performance of CWPUA coatings - Microscopic morphology of CWPUA coatings -
Performance of CWPUA coatings - Chemical resistance of CWPUA coatingsDOI : https://doi.org/10.1007/s11998-023-00857-5 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00857-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41064
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 3 (05/2024) . - p. 879-892[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24688 - Périodique Bibliothèque principale Documentaires Disponible Preparation and physical properties of polyurethane flame retardant coatings using phosphorus-containing lactone modified polyesters / Hong-Soo Park in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 71, N° 899 (12/1999)
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Titre : Preparation and physical properties of polyurethane flame retardant coatings using phosphorus-containing lactone modified polyesters Type de document : texte imprimé Auteurs : Hong-Soo Park, Auteur ; Soon-Yong Kwon, Auteur ; Kum-Jong Seo, Auteur ; Wan-Bin Im, Auteur ; Jong-Pyo Wu, Auteur ; Myong Ji, Auteur ; Seong-Kil Kim, Auteur ; Sam Hwa, Auteur Année de publication : 1999 Article en page(s) : p. 59-65 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Ignifugeants Composé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface.
Lactones
Phosphore
Polyesters
Polyisocyanates
Polymères ignifuges
Polyuréthanes
Revêtements bi-composant
RhéologieIndex. décimale : 667.9 Revêtements et enduits Résumé : Two-component polyurethane flame retardant coatings were prepared using phosphorus-containing lactone modified polyesters (PLMPs) and polyisocyanate. PLMPs were synthesized by polycondensation of dimethyl phenylphosphonate, a flame retardant component with polycaprolactone, adipic acid, and trimethylolpropane. PLMPs were prepared with dimethyl phenylphosphonate content from 10 to 20 wt%. It was found that various physical properties of these new flame retardant coatings were comparable to non-flame retardant coatings. The flammability of coatings depends strongly on the dimethyl phenylphosphonate content in PLMP. Coatings with 20 wt% dimethyl phenylphosphonate content did not burn in the vertical burning test. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of lactone modified polyester - Synthesis of phosphorus-containing lactone modified polyesters - Instrumental analyses - Preparation of polyurethane coatings - Physical properties of the coatings - Flame retardancy tests - Surface morphology
- RESULTS AND DISCUSSION : Identification of lactone modified polyester - Identification of phosphorus-containing lactone modified polyester - Rheological behavior of phosphorus-containing lactone modified polyester - Thermal behavior of phosophorus-containing lactone modified polyesters - Physical properties of coatings - Flame retardancy of coatingsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17948
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 71, N° 899 (12/1999) . - p. 59-65[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003566 - Périodique Bibliothèque principale Documentaires Disponible Preparation and properties of anti-biofouling zwitterionic polyurethane leather coating / Wang Chunhua in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 1 (01-02/2017)
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Titre : Preparation and properties of anti-biofouling zwitterionic polyurethane leather coating Type de document : texte imprimé Auteurs : Wang Chunhua, Auteur ; Mu Changdao, Auteur ; Lin Wei, Auteur Année de publication : 2017 Article en page(s) : p. 33-37 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse thermique
Analyse thermomécanique dynamique
Humidité -- Absorption:Eau -- Absorption
Microscopie électronique à balayage
Perméabilité
Polymères -- Synthèse
Polymères en émulsion
Polyuréthanes
Résistance à l'humidité:Résistance à l'eau
Revêtements antisalissures
Revêtements protecteurs
Vapeur d'eau
ZwitterionsUn zwitterion (de l'allemand Zwitter — "hybride", "hermaphrodite » prononcé [t͜svɪtɛrjɔ̃]) est une espèce chimique moléculaire possédant des charges électriques formelles d’une unité, de signes opposés et situées en général sur des atomes non adjacents (dans le cas où les deux charges formelles sont portées par deux atomes adjacents, on parle d'ylures comme les ylures de phosphore). Les acides aminés, qui possèdent des groupements amine (sous forme d'ammonium NH3+ à pH =7) et acide carboxylique (sous forme de carboxylate COO- à pH =7) peuvent exister sous forme zwitterionique (à l'état solide, dans certaines gammes de pH en solution aqueuse) . Les bétaïnes sont d'autres exemples de zwitterions.Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Antifouling coatings are of great interest in many fields including the leather industry. Herein, the effects of zwitterionic groups on the preparation, structure, and performance of anti-biofouling zwitterionic polyurethanes have been investigated. The results show that the addition of excessive 1,3-propane sulfone (1,3-PS) contribute to the completion of the ionization reaction of the polyurethane in the preparation process. However, the residual 1,3-PS leads to the formation of micropores in the polyurethane films and this can be removed by the precipitation of the synthesized products in water. Differential scanning calorimetry (DSC) and dynamic mechanical thermal analysis (MITA) show the decreased T of polyurethanes with the increasing of zwitterionic groups, indicating the slightly enhanced microphase separation of the polyurethanes. The water vapour permeability (WVP) and water absorption rate (WAR) of polyurethane films increase with zwitterion groups, and thus the water-resistant property of the films needs to be improved for the purpose of leather coatings. In the emulsification of polyurethane, the presence of zwitterionic sulfobetaine causes the pH decrease of the emulsions, and proper neutralization may adjust it in the further investigations. Note de contenu : - EXPERIMENTAL SECTION : Materials - Synthesis of zwitterionic polyurethane (iNPU) - Preparation of the waterborne zwitterionic polyurethane (WZPU)
- RESULTS AND DISCUSSION : SEM analysis - DSC and DMTA analysis - Water resistant properties - Water vapour permeability (WVP) - Size analysis of WZPU polyurethane emulsionEn ligne : https://drive.google.com/file/d/1T9EJyPfc2Ev96dsoQRW2rHCP_aAHTKOW/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27995
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 101, N° 1 (01-02/2017) . - p. 33-37[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18711 - Périodique Bibliothèque principale Documentaires Disponible Preparation and properties of matting waterborne polyurethane with polybutadiene / Ma Xingyuan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 5 (09-10/2019)
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Titre : Preparation and properties of matting waterborne polyurethane with polybutadiene Type de document : texte imprimé Auteurs : Ma Xingyuan, Auteur ; Zhang Mingrui, Auteur ; Liu Shuai, Auteur Année de publication : 2019 Article en page(s) : p. 241-246 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agent mattant
Caractérisation
Cuir
Emulsions -- Stabilité
Essais (technologie)
Humidité -- Absorption:Eau -- Absorption
Polybutadiène
Polybutylène téréphtalate
Polymères en émulsion
Polyuréthanes
Traîtements de surfaceIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : A matting waterborne polyurethane (MWPU) emulsion was prepared using polybutadiene diol (HTPB), polybutylene adipate diol (PBA) and isophorone diisocyanate (IPDI) as the main raw materials, dimethylolpropionic acid (DMPA) as a hydrophilic chain extender and ethylene diamine as a post chain extender, this was applied to the surface treatment of the leather. The surface microstructure of the MWPU film was studied by SEM. The results showed that when the content of HTPB increased, the particle size of MWPU emulsion increased, the stability decreased, the mechanical properties and surface roughness of MWPU film increased, the elongation at break, water absorption and light transmittance decreased. Combined with the matting effect, the gloss of the MWPU film was as low as 23GU, and the surface particles of the film were more obvious. The folding fastness was free from cracking, and the abrasion resistance could reach 154 circles [rubs], which meets the testing standard of leather. Note de contenu : - EXPERIMENTAL PROCEDURE : Experimental materials and instruments - Preparation of MWPU emulsion - Preparation of MWPU film - Effect of HTPB content on MWPU performance - Preparation of matting waterborne surface treatment agent - Characterisation and test methods
- RESULTS AND DISCUSSIONS : Effect of HTPB content on the appearance and stability of MWPU emulsion - Effect of HTPB content on water absorption rate of MWPU film - Effect of HTPB content on particle size of MWPU emulsion - Effect of HTPB content on light transmittance of MWPU film - SEM analysis - Surface treatment test results of MWPU film on leatherEn ligne : https://drive.google.com/file/d/1a7ysIBvAylOjF7xzoza9B0FDXMN8dg4j/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32998
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 103, N° 5 (09-10/2019) . - p. 241-246[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21222 - Périodique Bibliothèque principale Documentaires Disponible Preparation and properties of polyaminosiloxane modified polyester waterborne polyurethane / Chengshu Xu in INTERNATIONAL POLYMER PROCESSING, Vol. XXXV, N° 2 (05/2020)
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PermalinkPreparation and properties of polyurethane finishing agent using butylamine as chain-extension agent / Keyong Tang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIV, N° 9 (09/2009)
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PermalinkPreparation and properties of waterborne polyurethane modified by stearyl acrylate for water repellents in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 6 (11/2018)
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PermalinkPreparation and stability of aqueous acrylic polyol dispersions for two-component waterborne polyurethane / Li Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 1 (01/2017)
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PermalinkPreparation and surface properties of silicone-modified polyester-based polyurethane coats / Jun Yang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 3, N° 4 (10/2006)
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PermalinkPreparation, characterization and properties of UV-curable waterborne polyurethane acrylate/siO2 coating / Qiu Fengxian in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 5 (09/2012)
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PermalinkPreparation of cationic fluorinated polyurethane micro-emulsion and its application in leather finishing / Li Peizhi in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 94, N° 6 (11-12/2010)
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PermalinkPreparation of high-solid, low-viscosity waterborne polyurethane: based on multiparticle size composite emulsification / Kunpeng Lou in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)
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PermalinkPreparation of novel organo-montmorillonite and its influence on the acid resistance of hybrid cathodic electrodeposition polyurethane coating / Zijian Li in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 2 (03/2019)
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PermalinkPreparation of polyols and polyurethane foams from olein by-product of tanning industry / Manoel Rodrigues da Silva in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 11 (11/2022)
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PermalinkPreparation of polyurethane coating formulation based on dihydropyridine derivatives as an insecticide and antifungal additives for surface coating applications / Mohamed A. Awad in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 2 (03/2023)
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PermalinkPreparation of PVA/PU/PUA microcapsules and application in self-healing two-component waterborne polyurethane coatings / Xinmeng Xu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 3 (05/2022)
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PermalinkPreparation of TPU electrospun fibrous / Rao Lixian in CHEMICAL FIBERS INTERNATIONAL, Vol. 69, N° 4 (12/2019)
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PermalinkLe présent et l'avenir des colles polyuréthanes dans l'industrie de la chaussure / A. Navai in TECHNICUIR, N° 7 (09/1971)
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PermalinkPrinted tools for high-volume production / Paul Heiden in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 5 (05/2019)
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