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Studies on the effect of polyurethane finishing on the physico-mechanical properties of leather / Rajesh Kumar in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
[article]
Titre : Studies on the effect of polyurethane finishing on the physico-mechanical properties of leather Type de document : texte imprimé Auteurs : Rajesh Kumar, Auteur ; G. N. Mathur, Auteur Année de publication : 1987 Article en page(s) : p. 147-152 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation
Cuirs et peaux -- Finition
Cuirs et peaux -- Propriétés chimiques
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux -- Propriétés physiques
Essais de résilience
Essais dynamiques
Revêtements organiquesIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : This paper deals with the techniques for preparation of a single-component polyurethane coating based on castor oil and its application for finishing of leather. Various physical properties were measured to assess the quality of finished leather after coating it with the polyurethane composition. Optical and scanning electron microscopy studies were undertaken to investigate the compatibility of polyurethane coating with leather. Note de contenu : - Preparation of castor oil-based polyurethane
- Characterisation of polyurethane coating
- Physical properties measurement
- Table 1 : Tensile properties of polyurethane-coated and uncoated leather
- Table 2 : Abrasion resistance of polyurethane-coated and uncoated leather
- Table 3 : Flexing endurance values of polyurethane coated and uncoated leather
- Table 4 : Rub fastness data of polyurethane coated and uncoated leather
- Table 5 : Water penetration, water absorption and water vapour permeability of polyurethane-coated and uncoated leather
- Table 6 : Chemical resistance properties of polyurethane-coated and uncoated leather
- Table 7 : Scuff resistance of polyurethane-coated and uncoated leatherEn ligne : https://drive.google.com/file/d/1HfitjCrZFBKDK5jtF_-J8x9EnNPRWGTf/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40129
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Code-barres Cote Support Localisation Section Disponibilité 007135 - Périodique Bibliothèque principale Documentaires Disponible Studies on the effect of structural parameters on the properties of polysiloxaneurethane dispersions and coatings / J. Kozakiewicz in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 89, B1 (03/2006)
[article]
Titre : Studies on the effect of structural parameters on the properties of polysiloxaneurethane dispersions and coatings Type de document : texte imprimé Auteurs : J. Kozakiewicz, Auteur ; A. Koncka-Foland, Auteur ; J. Skarzynski, Auteur ; J. W. Sobczak, Auteur ; M. Zielecka, Auteur Année de publication : 2006 Article en page(s) : p. 31-39 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adhésion
Copolymère uréthane acrylique
Dispersions et suspensions
Dureté (matériaux)
Résistance à l'humidité:Résistance à l'eau
Résistance chimique
Revêtements -- Analyse
Revêtements -- Propriétés mécaniques
Revêtements organiques
Transition vitreuseIndex. décimale : 667.9 Revêtements et enduits Résumé : The results of studies on the effect of introducing double bonds and siloxane segments to the polyurethaneurea chain on the properties of polyurethane and polyurethane-acrylic/styrene dispersions and coatings are presented. In order to investigate that effect a 23 factorial experiment was designed and conducted. Several properties of dispersions, coatings and films were determined, including,inter alia, particle size, stability, and MFFT (minimum film-forming temperatures) of dispersions, hardness, resistance to water and solvents, adhesion of coatings and mechanical properties, and the glass-transition temperature (Tg) of films. Properties of coatings and films subjected to additional curing were also investigated. Analysing the results of the factorial experiment helped to better understand the mutual effect of several factors on the properties of the investigated materials. ESCA (electron spectroscopy for chemical analysis) and DCA (dynamic contact angle) studies of the surface properties of the coatings were also carried out. Note de contenu : - EXPERIMENTAL : Dispersion synthesis - Formation of coatings and films - Testing of dispersons, coatings and films - Testing of surface properties of coatings - Design of factorial - Analysis of factorial experiment results - Effect of polymer structure - related factors (XI, X2 and X3) on the properties of polysiloxane urethane-acrlic/styrene dispersions - Effect of polymer structure - related factors (X1, X2 and X3) on the properties of films made from polysiloxane urethane-acrylic/styrene dispersions - Effect of structural parameters and of additional curing by a curing (polyaziridine) and by UV on the surface properties of coatings made from polysiloxane urethane and polysiloxane urethane-acrylic/styrene dispersions
- Table 1 : Selected results of properties of dispersions, coatings and films determined for products of single experiments that constituted the factorial experiment
- Table 2 : Effect of additional curing on surface properties of coatings prepared from starting polysiloxaneurethane dispersion (DPU-PJ 441) and polysiloxaneurethaneacrylic~styrene dispersion (PUM 442) obtained from DPU-PJ 441 after polymerisation of acrylic~styrene monomers in it - results of ESCA analysis (Si/N atoms ratio) and DCA determination of the coatings (ACA = advancing contact angle, RCA = receding contact angle)
- Table 3 : Effect of distance from the coating surface on siloxane segments content (Si/N ratio) in the polymer determined by ESCA for coatings obtained from polysiloxaneurethane (DPU-PJ 441) and polysiloxaneurethane-acryliclstyrene (PUM 442) dispersionsDOI : 10.1007/BF02699612 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699612.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5393
in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 89, B1 (03/2006) . - p. 31-39[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003916 - Périodique Bibliothèque principale Documentaires Disponible Studies on thermal and morphological characteristics of siloxane containing epoxy resins cured by microwave radiation / N. Uyanik in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 87, B2 (06/2004)
[article]
Titre : Studies on thermal and morphological characteristics of siloxane containing epoxy resins cured by microwave radiation Type de document : texte imprimé Auteurs : N. Uyanik, Auteur ; C. Erbil, Auteur ; M. Karadayi, Auteur Année de publication : 2004 Article en page(s) : p. 91-96 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation
Copolymère silicone acrylate
Epoxydes
Micro-ondes
Microscopie électronique à balayage
Revêtements -- Séchage sous rayonnement ultraviolet
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Microwave radiation was performed on a diglycidyl ether of a bisphenol-A type epoxy monomer with an aliphatic polyamino-curing agent. The ratio of epoxy monomer to curing agent was taken as 2. Two different molecular weights of silicone acrylates were used in various ratios for the modification of the system. The mechanical characterisation and hardness measurements of these samples were performed. As the siloxane content in the epoxy resin system was increased, Young’s modulus and hardness decreased. Further, the strength at Fmax, toughness and percentage elongation showed a maximum of about 10% for one kind of PDMS containing epoxy system. Thermal characterisations of the samples were determined with a thermogravimetric analyzer. The decomposition of the samples was a two-stage process with maximum weight loss rates in between 320 to 400°C or 330 to 430°C°C, depending on the molecular weights of PDMS modifier. The SEM photographs of the cold-fractured samples were taken. As the siloxane content in the epoxy resins was increased, the fractured surfaces became rougher and showed more irregular stripes in the matrix. Note de contenu : - EXPERIMENTAL : Materials - Analyses and methods - Preparation of the epoxy films
- RESULTS AND DISCUSSION : Mechanical characterisation of the epoxy films - Thermal characterisation of the epoxy films - Morphology of the epoxy films
- Table 1 : Preparation conditions of epoxy resins
- Table 2 : Average results of the film samples containing PDMS V-Si 21
- Table 3 : Average results of the film samples containing PDMS V-Si 22
- Table 4 : Average results of shore D hardness of the samplesDOI : 10.1007/BF02699602 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699602.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5468
in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 87, B2 (06/2004) . - p. 91-96[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000391 - Périodique Bibliothèque principale Documentaires Disponible Study of the properties of novel hybrid coatings under the influence of phase compatibility / Huang Dong in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 4 (07/2016)
[article]
Titre : Study of the properties of novel hybrid coatings under the influence of phase compatibility Type de document : texte imprimé Auteurs : Huang Dong, Auteur ; Jun Wang, Auteur ; Jijun Tang, Auteur ; Wenjun Shen, Auteur ; Weili Li, Auteur ; Jing Zhang, Auteur ; Zexiao Xu, Auteur Année de publication : 2016 Article en page(s) : p. 691-701 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Copolymérisation
Polyacryliques
Polyaddition
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.
Réaction de couplage
Réticulants
Réticulation (polymérisation)
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : In this article, a series of hybrid coatings were prepared and characterized. At first, polydimethylsiloxane modified with siliane coupling agent was copolymerized with acrylate monomers by free radical polymerization to get the hybrid resins. Due to the combination of covalent bond, the prepared hybrid resins were uniform and transparent. Then a series of hybrid resins were cured with tetraethoxysilane and dibutyltin dilaurate as the crosslinker and catalyst, respectively. The blends were loaded onto the substrate, such as tin plate, steel panels, or flat glass, and cured by heating to form hybrid coatings. To study the factors on the properties of the prepared hybrid resins and cured coatings, various measurements were carried out, such as FTIR, TGA, DSC, laser optical microscope, water contact angles, pencil scratch hardness, and the electrochemistry test. Thanks to the combination of covalent bond, the two components dispersed uniformly in the prepared hybrid resins and no cracks were observed from the cured hybrid coatings with an optical microscope. With excellent mechanical properties, thermal stability, corrosion resistance, and hydrophobic property, the prepared hybrid coatings can find application in the heavy-duty chemical industry. Note de contenu : - EXPERIMENTAL : Preparation of the hybrid resins - Coating procedure - Characterization
- RESULTS AND DISCUSSION : FTIR measurements - Surface morphology - Thermal properties - Physical properties of the cured hybrid coatings - Anticorrosion behaviorDOI : 10.1007/s11998-015-9776-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9776-y.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26749
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Code-barres Cote Support Localisation Section Disponibilité 18223 - Périodique Bibliothèque principale Documentaires Disponible Study on influencing factors of stability of acrylate cathodic electrodeposition coatings / Xu Conghui in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 212, N° 4675 (06/2022)
[article]
Titre : Study on influencing factors of stability of acrylate cathodic electrodeposition coatings Type de document : texte imprimé Auteurs : Xu Conghui, Auteur ; Zheqing Gong, Auteur ; Wangting Zhao, Auteur ; Lijun Chen, Auteur Année de publication : 2022 Article en page(s) : p. 49-51 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation
Dépôt électrolytique
Polyacrylates
Réticulants
Revêtements -- Stabilité
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : The stability of the CED coatings is vital to their storage and application, which have an important effect on the film of the CED coatings. In this work, CED coatings were prepared by mixing the synthetic resin and blocked isocyanate. The factors, which have an influence on the stability of the CED coatings, were studied and optimised. The optimum conditions for preparing the CED coatings with good stability are the following. The mixing process is that the resin and curing agent is mixed well, and then water is added to disperse in the blender. The rotational speed and dispersed time were 900r/min and 40min, respectively. TDI trimer was the curing agent of the CED coating. The neutralisation degree was 80%. Note de contenu : - EXPERIMENTAL : Materials - Preparation of CED coatings - Characterisation
- RESULTS AND DISCUSSION : Influence of mixed process on stability of CED coatings - Effect of agitation on the stability of CED coatings - Determination of curing agent - Influence of components of cationic acrylate resin on stability of CED coatings
- Table 1 : Effect of mixing process on stability of CED coatings
- Table 2 : Influence of agitation on stability of CED coatings
- Table 3 : Main parameters of curing agents
- Table 4 : Effec(ts of curing agent on stability of CED coatings
- Table 5 : Influences of different amine value and hydroxyl value on appearance and stability of CED coatingsEn ligne : https://drive.google.com/file/d/19TTEkh3IzJZZBS5kdemEFqnTBsaj3pND/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37786
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