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Formulation and study of corrosion prevention behavior of epoxy cerium nitrate-montmorillonite nanocomposite coated carbon steel / E. Darmiani in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 4 (07/2013)
[article]
Titre : Formulation and study of corrosion prevention behavior of epoxy cerium nitrate-montmorillonite nanocomposite coated carbon steel Type de document : texte imprimé Auteurs : E. Darmiani, Auteur ; I. Danaee, Auteur ; G. R. Rashed, Auteur ; Davood Zaarei, Auteur Année de publication : 2013 Article en page(s) : p. 493-502 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique.
L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1.
C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple.
Anticorrosifs
Anticorrosion
Epoxydes
Matériaux hybrides
Métaux -- Revêtements protecteurs
Montmorillonite
Nanoparticules
Nitrate de cérium
Spectroscopie d'impédance électrochimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : Nanocomposite coatings which were applied on carbon steel panels based on epoxy cerium nitrate–montmorillonite (MMT) were synthesized and formulated. Nanoparticles were incorporated into epoxy resin by mechanical and sonication processes. The state of dispersion, dissolution, and incorporation were characterized by optical microscopy, sedimentation tests, X-ray diffraction, and transmission electron microscopy. To investigate anticorrosive properties of nanocomposite coatings, electrochemical impedance spectroscopy and salt spray tests were employed. The experimental results showed that epoxy cerium nitrate–MMT nanocomposite coatings were superior to the neat epoxy in corrosion protection effects. In addition, it was observed that the corrosion protection of nanocomposite coatings was improved as the clay loading was increased up to 4–2 wt% cerium nitrate. Note de contenu : - EXPERIMENTAL : Materials - Preparation of nanocomposites - Sample preparation - Laboratory
- RESULTS AND DISCUSSION : Optical microscopy results - Stability - XRD and TEM analysis - Electrochemical impedance spectroscopy - Salt spray testDOI : 10.1007/s11998-012-9463-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9463-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19099
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Code-barres Cote Support Localisation Section Disponibilité 15460 - Périodique Bibliothèque principale Documentaires Disponible 15594 - Périodique Bibliothèque principale Documentaires Disponible Gas transport properties in waterborne polymer nanocomposite coatings containing organomodified clays / M. Stratigaki in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 6 (11/2014)
[article]
Titre : Gas transport properties in waterborne polymer nanocomposite coatings containing organomodified clays Type de document : texte imprimé Auteurs : M. Stratigaki, Auteur ; G. Choudalakis, Auteur ; A. D. Gotsis, Auteur Année de publication : 2014 Article en page(s) : p. 899-911 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Argile
Diffusion (physique)
Exfoliation
Gaz
Matériaux hybrides
Montmorillonite
Perméabilité
Polyacryliques
Polyuréthanes
Revêtements en phase aqueuse:Peinture en phase aqueuse
SolubilitéIndex. décimale : 667.9 Revêtements et enduits Résumé : Nanostructured composite coatings, consisting of phylosilicates embedded within polymer matrices, were prepared and characterized. Waterborne acrylic and polyurethane resins were employed as matrix, and hydrophilic or organically modified nanoparticles of montmorillonite as reinforcement. Emphasis in this article is put on the preparation of the coating. An overview of the major steps involved is presented. The choice of a suitable solvent for the preparation stage is based on the values of the solubility parameters of the constituents. The characterization techniques that are used include X-ray diffraction analysis, gas permeation measurements, and IR spectroscopy. The results highlight the significance of the selection of appropriate ingredients and the knowledge of the interactions between the clay particles, the organic matrix, and the solvents used for the preparation of the coating. Note de contenu : - Film formation of a waterbone nanocomposite coating
- EXPERIMENTAL : Materials - Sample preparation - Sample characterization
- RESULS AND DISCUSSION : The structure of the nanocomposites - IR analysis - The effect of the clays on CO₂ gas diffusion - The compatibility of suspension media and organomodified claysDOI : 10.1007/s11998-014-9594-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9594-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22313
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Code-barres Cote Support Localisation Section Disponibilité 16659 - Périodique Bibliothèque principale Documentaires Disponible In situ polymerization of PET in the presence of pristine and organo-modified clays / Babak Esmaeili in INTERNATIONAL POLYMER PROCESSING, Vol. XXVIII, N° 3 (07/2013)
[article]
Titre : In situ polymerization of PET in the presence of pristine and organo-modified clays Type de document : texte imprimé Auteurs : Babak Esmaeili, Auteur ; C. Dubois, Auteur ; P. J. Carreau, Auteur ; M.-C. Heuzey, Auteur Année de publication : 2013 Article en page(s) : p. 331-340 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Argile
Cloisite
Matériaux hybrides
Microscopie électronique à balayage
Montmorillonite
Oligomères
Polycondensation
Polyéthylène téréphtalate
Polymérisation
SilicatesIndex. décimale : 668.4 Plastiques, vinyles Résumé : In this work two types of montmorillonite, a pristine and an organo-modified clay (Cloisite 30B), were employed to produce (polyethylene terephthalate)-based nanocomposites via in situ polymerization. Using water as an intermediate medium, a stable dispersion of pristine clay in ethylene glycol was achieved. However, after polymerization, no significant gain was obtained in terms of delamination of silicate platelets. The polycondensation reaction when using Cloisite 30B was carried out at a temperature as low as 250 °C in order to retain a considerable portion of the organo-modifier. The results showed that Cloisite 30B was successfully intercalated by the polymer chains, resulting in a d-spacing increase from 1.9 nm to about 3.6 nm. Although some mono and double silicate layers were observed in microscopy images, the major part of the organoclay remained in a tactoid intercalated form. Sampling during the polycondensation reaction revealed that, in this process, clay was first swelled efficiently by the monomer, and this structure was preserved in the early stage of polycondensation. However, the silicate platelets collapsed with time as the polycondensation progressed and larger molecular weight oligomers were formed. An investigation on the type of impeller used in the polymerization process showed that a slight improvement was achieved in terms of aggregate size and distribution when the anchor impeller was replaced by a helical one. Note de contenu : - EXPERIMENTAL : Materials - Experimental set-up - Insitu polymerization procedure
- CHARACTERIZATION
- RESULTS AND DISCUSSION : Incorporation of pristine clay in the polymerization process - Incorporation of cloisite 30B in the polymerization process - The effect of impellerDOI : 10.3139/217.2760 En ligne : https://drive.google.com/file/d/1NKVQI71S9dtRtWmF9aqWsAS0geFf6Wxb/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19023
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Code-barres Cote Support Localisation Section Disponibilité 15238 - Périodique Bibliothèque principale Documentaires Disponible Influence of blending protocol on the thermal and mechanical properties of HDPE/LLDPE blend-based nanocomposites / Fabio R. Passador in INTERNATIONAL POLYMER PROCESSING, Vol. XXXI, N° 4 (08/2016)
[article]
Titre : Influence of blending protocol on the thermal and mechanical properties of HDPE/LLDPE blend-based nanocomposites Type de document : texte imprimé Auteurs : Fabio R. Passador, Auteur ; Adhemar C. Ruvolo-Filho, Auteur ; L. A. Pessan, Auteur Année de publication : 2016 Article en page(s) : p. 472-481 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alliages polymères
Alliages polymères -- propriétés mécaniques
Alliages polymères -- Propriétés thermiques
Anhydride maléique
Charges (matériaux)
Copolymères greffés
Matériaux hybrides -- Propriétés mécaniques
Matériaux hybrides -- Propriétés thermiques
Montmorillonite
Nanoparticules
Polyéthylène basse densité linéaire
Polyéthylène haute densité
Polyéthylène maléate
RhéométrieIndex. décimale : 668.4 Plastiques, vinyles Résumé : Nanocomposites based on high density polyethylene (HDPE)/linear low density polyethylene (LLDPE) blend were prepared by melt compounding in a twin-screw extruder using an organoclay (montmorillonite) as nano-filler and maleic anhydride-grafted linear low density polyethylene (LLDPE-g-MA) as compatibilizer. The effects of two blending protocols were also investigated. In the first blending protocol LLDPE and LLDPE-g-MA were first reinforced with organoclay and then this nanocomposite was later blended with HDPE, and the second blending protocol LLDPE-g-MA was mixed with organoclay first and then this masterbatch was diluted with HDPE and LLDPE. The preparation of the masterbatch resulted in the degradation of polyethylene, with crosslinking formation which increase the viscosity of the polymer and facilitated the dispersion of the organoclay in the polymeric matrix. WAXD and TEM were used to determine the effect of blending protocol and organoclay content on the intercalation and mechanical properties. The introduction of a maleated polyethylene was required to improve the organoclay dispersion in the nanocomposites. Thermal and mechanical properties of the nanocomposites were affected by blending protocols and the content of organoclay. The degree of crystallinity of the materials prepared using the first blending protocol decreased upon the intercalation of clay platelets whereas for the materials obtained using the second blending protocol the degree of crystallinity decreased due the crosslinking which further restricted mobility and diffusion of polymer chains. The nanocomposites show higher values of tensile modulus, flexural modulus and HDT compared to the blend without the addition of organoclay. The OMMT content added to the polymer blend results in significant and well correlated improvements in tensile and flexural moduli. Note de contenu : - EXPERIMENTAL : Materials - Melt processing - Swelling measurements - Nanocomposite preparation - Characterization of the nanocomposites
- RESULTS AND DISCUSSION : Rheometric torque curves - WAXD and TEM analysis - Thermal properties - Mechanical propertiesDOI : 10.3139/217.3238 En ligne : https://drive.google.com/file/d/1SjcBsX-9U4ulsD2GK9mQjCy-2SsOns42/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26809
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Code-barres Cote Support Localisation Section Disponibilité 18238 - Périodique Bibliothèque principale Documentaires Disponible Influence of melt-mixing process conditions on mechanical performance of organoclay/fluoroelastomer nanocomposites / M. Khajehpour in INTERNATIONAL POLYMER PROCESSING, Vol. XXXI, N° 1 (03/2016)
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Titre : Influence of melt-mixing process conditions on mechanical performance of organoclay/fluoroelastomer nanocomposites Type de document : texte imprimé Auteurs : M. Khajehpour, Auteur ; Uttandaraman Sundaraj, Auteur Année de publication : 2016 Article en page(s) : p. 2-10 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Allongement (mécanique)
Composites -- Propriétés mécaniques
Composites -- Propriétés thermiques
Essais dynamiques
Etat fondu (matériaux)
Fluoroélastomères
Matériaux hybrides
Mélanges (chimie)
Montmorillonite
Réticulation (polymérisation)
Rhéologie
Stabilité thermique
Traction (mécanique)Index. décimale : 668.4 Plastiques, vinyles Résumé : In this study, Cloisite 20A, an organically modified Montmorillonite (Mnt), has been incorporated into Fluoroelastomer (FKM) through melt intercalation technique. Since the nanocomposite preparation method and conditions, and consequently, the resulting morphology play a critical role in the final properties, the effect of different process conditions such as time, temperature, and shear rate on the vulcanization, thermal and mechanical properties have been investigated. The morphology of nanocomposites, prepared at different melt-mixing conditions, was studied using X-ray diffraction (XRD). Rheological, thermal and mechanical behaviors were investigated by moving die rheometer (MDR), thermal gravimetric analysis (TGA), and tensile strength test respectively. Also, the crosslinking density has been measured for the nanocomposites. The best mechanical performance of clay/FKM nanocomposites was attained by optimization of the melt-mixing conditions. We achieved the following enhancements for FKM by clay incorporation: enhancement of tensile strength up to 70 %; elongation up to 94 %; and modulus up to 405 %. Process temperature was found to have a critical role in the final properties of the nanocomposites, while mixing residual time and shear rate had a moderate effect. The most desirable properties and curing behaviors, including highest maximum torques, cure rates, crosslinking densities, fast crosslinking kinetics, high intercalation and best improved tensile strengths, resulted with specific combination of melt-mixing parameters. Note de contenu : - EXPERIMENTAL : Materials - Clay/FKM nanocomposite preparation - Nanocomposite characterization - Crosslinking density measurement
- RESULTS AND DISCUSSION : Thermal stability - Morphology - Rheometry and crosslinking measurement - Mechanical propertiesDOI : 10.3139/217.3031 En ligne : https://drive.google.com/file/d/1J4A2CaajeU3z0mtGXbHLT5zFY2seSGER/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25760
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Code-barres Cote Support Localisation Section Disponibilité 17899 - Périodique Bibliothèque principale Documentaires Disponible Influence of twin-screw processing conditions on structure and properties of polypropylene – organoclay nanocomposites / T. Domenech in INTERNATIONAL POLYMER PROCESSING, Vol. XXVII, N° 5 (11/2012)
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