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Under pressure / Rod Martin in JEC COMPOSITES MAGAZINE, N° 88 (04/2014)
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Titre : Under pressure : Testing energy plastics for oil & gas applications Type de document : texte imprimé Auteurs : Rod Martin, Auteur Année de publication : 2014 Article en page(s) : p. 73-75 Langues : Anglais (eng) Catégories : Essais dynamiques
Industrie pétrolière et gazière -- Matériaux
Pression -- Mesure
Structures offshore
ThermoplastiquesUne matière thermoplastique désigne une matière qui se ramollit (parfois on observe une fusion franche) d'une façon répétée lorsqu'elle est chauffée au-dessus d'une certaine température, mais qui, au-dessous, redevient dure. Une telle matière conservera donc toujours de manière réversible sa thermoplasticité initiale. Cette qualité rend le matériau thermoplastique potentiellement recyclable (après broyage). Cela implique que la matière ramollie ne soit pas thermiquement dégradée et que les contraintes mécaniques de cisaillement introduites par un procédé de mise en forme ne modifient pas la structure moléculaire.
TuyauterieIndex. décimale : 668.4 Plastiques, vinyles Résumé : The oil & gas sector is continuously evolving. No sooner has a new material or application been innovated than the majors wish to build on the technology to better exploit previously inacessible reserves. With the so-called "easy" oil drying up as land-based and shallow water reserves are all but exhausted, the irreversible trend is towards deeper, colder and more extreme underwater environments. Save for select areas in the Middle East, traditional on- and offshore techniques used to extract oil are becoming obsolete, as the search moves farther (and deeper) afield. Note de contenu : - Piping hot
- Pressure testing thermoplastic materials
- Pressure testing thermoplastic componentsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21385
in JEC COMPOSITES MAGAZINE > N° 88 (04/2014) . - p. 73-75[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16229 - Périodique Bibliothèque principale Documentaires Disponible Understanding dispersion of copper phthalocyanine alpha blue pigment in polyethylene masterbatch with the use of wax / Mert Yücetürk in COLORATION TECHNOLOGY, Vol. 136, N° 6 (12/2020)
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Titre : Understanding dispersion of copper phthalocyanine alpha blue pigment in polyethylene masterbatch with the use of wax Type de document : texte imprimé Auteurs : Mert Yücetürk, Auteur ; Mehmet Özgür Seydibeyoglu, Auteur Année de publication : 2020 Article en page(s) : p. 526-534 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bleu (couleur)
Caractérisation
Cires
Dispersions et suspensions
Essais dynamiques
Films plastiques
Granulométrie
Mélanges-maîtres (chimie)
Phtalocyanine de cuivre
Pigments inorganiques
Polyéthylène
Traction (mécanique)Index. décimale : 667.3 Teinture et impression des tissus Résumé : Coloured plastics and polymers are widely used in packaging and consumer goods. Despite their critical roles, there is limited literature on detailed analysis of effective pigment dispersion in polymer matrices for masterbatch applications. In this study, detailed research was conducted on pigment dispersion using different wax materials and their performances in polyethylene masterbatches were compared. During the study, it was first found that the presence of salt crystals plays a critical role in dispersion in one of the tested pigments. Using a laser particle size device, it was shown that homogeneous particle size distribution is another critical parameter for proper pigment distribution. Although filter testing is a common method in industrial applications, there is very limited information in the academic literature. The filter test method was used to examine the effects of different polyethylene waxes on pigment dispersion. The best filter pressure values were obtained in masterbatches made with micronised wax. It was also observed that the improved dispersion increased the mechanical properties of the masterbatch. The masterbatch colours were measured with a sphere spectrophotometer and it was observed that uniform pigment distribution increased the colour strengths. Similar results were also seen in polyethylene films produced by the blown film process. Note de contenu : - EXPERIMENTAL : Materials - Scanning electron microscopy - Pigment particle size analysis - Masterbatch production - Measurement of the quality of dispersion - Preparation of plates - Colour measurement - Tensile test - Preparation of plastic films
- RESULTS AND DISCUSSION : Pigment analysis - Masterbatch analysisDOI : https://doi.org/10.1111/cote.12506 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12506 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34706
in COLORATION TECHNOLOGY > Vol. 136, N° 6 (12/2020) . - p. 526-534[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22386 - Périodique Bibliothèque principale Documentaires Disponible Understanding slip coefficient and tension creep testing of coatings used in slip-critical bolted connections / Bill Corbett in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 31, N° 1 (01/2014)
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Titre : Understanding slip coefficient and tension creep testing of coatings used in slip-critical bolted connections Type de document : texte imprimé Auteurs : Bill Corbett, Auteur ; Carly McGee, Auteur Année de publication : 2014 Article en page(s) : p. 22-41 Langues : Américain (ame) Catégories : Assemblages à boulons
Calcul
Coefficient de glissement
Essais (technologie)
Essais dynamiques
Fluage
Métaux -- Revêtements protecteursIndex. décimale : 667.9 Revêtements et enduits Résumé : Bridges, buildings, and other structures commonly include designed bolted connections of steel beams, girders, and other structural members using connection/splice plates of various sizes and configurations. High-strength bolts are used to secure the connections. The holes in the steel members and the connection/splice plates are larger (typically 1/16-1/8 of an inch larger) than the boit shafts to enable the bolts to be inserted and tensioned against the washers and nuts. The interface of the connection/splice and the structural member is called a faying surface. Faying surfaces are not required to be coated, but are often protected to prevent corrosion at the interface and rust bleed on coated surfaces adjacent to the connection. When a designer elects to coat the faying surfaces, the coating used on these surfaces must have slip-resistant properties to reduce fatigue on the connection during loading/unloading cycles (e.g., vehicles traveling across a bridge deck). Therefore, before use, the coatings specified for these faying surfaces must be tested and classified for slip coefficient properties. Once the classified coating is applied, the connection points are masked to prevent subsequent coats from inadvertently contacting these areas.
There is no stipulation for specific coating types that must be used in these bolted connections, although zinc-rich primers are common and typically have slip resistance properties. Other generic coating types, including polyamide epoxy primers, have been tested and used. Other products, such as thermal spray coatings (various alloys, with and/or without a sealer) and roughened hot dip galvanized steel may be viable candidates, provided they have been tested and demonstrate slip-resistant properties.
The American Institute of Steel Construction (AISC) and the Research Council on Structural Connections (RCSC) publish the Specification for Structural Joints Using High Strength Bolts. The specification comprises ten sections, which only minimally address testing of coatings used in bolted joints. However, Appendix A, "Testing Method to Determine the Slip Coefficient for Coatings Used in Bolted Joints" contains four sections relating to coating testing (General Provisions; Test Plates and Coating of the Specimens; Slip Tests; and Tension Creep Tests). The focus of this article is on the testing required in Appendix A.
Note de contenu : - ESSENTIAL VARIABLES
- CORRECTION OF COATING THICKNESS DEFICIENCIES
- TEST PLATE DESIGN AND SURFACE PREPARATION
- TEST PLATE MOUNTING, COATING APPLICATION, AND CURING PROCEDURES
- COATING THICKNESS MEASUREMENT AND SELECTION OF CONTACT SURFACES
- TEST ASSEMBLIES : Slip coefficient test procedure - Slip coefficient calculation - Tension creep test procedure
- OTHER CONSIDERATIONS : 1. What is the effect (if any) of surface profile shape on the slip coefficient properties of coatings ? - 2. What is the effect (if any) of surface profile depth on the slip coefficient properties of coatings ? - 3. Is there a difference in slip coefficient properties when a coating is tested over a surface that has been power tool cleaned (i.e. SSPC-SP 11 or SP 15) versus abrasive blast cleaned ? - 4. Is there a curing "window" (both a minimum and a maximum set time prior to bolt-up) ? - 5. What is the effect of using a different type of thinner (acceptable for use by the coating manufacturer) on the slip coefficient properties ? - 6. What is the effect of using lesser or greater amounts of thinner ? - 7. Five replicate assemblies are tested for slip coefficient and then averaged to generate a single slip coefficient value. Is there an acceptable standard deviation between the replicate trials ? that is, what determines an "outlier" ? - 8. Mating of dissimilar coatingsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20904
in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 31, N° 1 (01/2014) . - p. 22-41[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15990 - Périodique Bibliothèque principale Documentaires Disponible Unique additives for high-performance industrial protective coatings / Yong Zhang in COATINGS TECH, Vol. 20, N° 3 (05-06/2023)
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Titre : Unique additives for high-performance industrial protective coatings Type de document : texte imprimé Auteurs : Yong Zhang, Auteur ; Bridgette Hendrix, Auteur Année de publication : 2023 Article en page(s) : p. 56-62 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Epoxydes
Essais de résilience
Essais dynamiques
Polyphénoxy
Réticulants
Revêtements -- Propriétés physiques
Revêtements bi-composant
Revêtements en phase aqueuse -- Additifs
Revêtements organiques
Revêtements protecteurs
ZincIndex. décimale : 667.9 Revêtements et enduits Résumé : Two-component (2K) epoxy coatings have long been used for industrial protective applications due to their excellent adhesion to a wide range of substrates, superior chemical resistance, and good mechanical properties.1 Today, those in the industry who are looking for innovations that can boost coating performance heavily prioritize high performance and productivity in particular.
Their main goal is to extend coating life service time and use the fewest coating layers possible. Additives, or performance boosters, are commonly used for this purpose in a formulation. One example of an additive is tougheners, which are used in many high-performance industrial protective coatings to improve their toughness, flexibility, adhesion, and long-term performance.
Phenoxy resins are unique polymerbased additives that have become available to formulators. Phenoxy resins are the product of bisphenol A and epichlorohydrin, with the epoxide ring opened. They are a tough and ductile thermoplastic material with high cohesive strength and good impact resistance. The backbone ether linkages and pendant hydroxyl groups promote wetting and bonding to polar substrates and fillers. The typical phenoxy resin structure is shown in Figure 1.
The structure of the phenoxy resin is a polyhydroxyether with terminal alphaglycol groups. Weight-average molecular weights range from approximately 25,000 to above 60,000, with n ranging from 30 to above 60. This long chain linear polyhydroxylether structure allows for excellent adhesion, impact and abrasion resistance, flexibility, and chemical resistance in coating applications.
Phenoxy resins are soluble in a variety of materials, including ketones, glycol ethers, and glycol ether esters. This article discusses the use of a phenoxy solvent solution, in a solventborne zinc-rich primer formulation. A performance comparison with a commercially available zinc-rich primer will also be discussed, specifically comparing adhesion, dry time, hardness, impact resistance, and salt spray corrosion resistance.Note de contenu : - RAW MATERIALS AND TESTING PANEL PREPARATION
- TESTING PROCEDURE : Dry time - Cross-hatch adhesion - König hardness - Mandrel bend flexibility - Impact resistance
- Fig. 1 : Phenoxy resin structure
- Table 1 : Physical properties of the control
- Table 2 : Physical properties of the phenoxy resin PKA
- Table 3 : Waterborne phenoxy-modified in 2K waterborne zinc-rich primer formula : a. Epoxy resin component - b. Curing agent componentEn ligne : https://drive.google.com/file/d/1HRUD5_KJug_0FmEN6WqqQhyWagavtJBq/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39425
in COATINGS TECH > Vol. 20, N° 3 (05-06/2023) . - p. 56-62[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24067 - Périodique Bibliothèque principale Documentaires Disponible Updating the Mandrel Bend Test for paint coatings / John Fletcher in SURFACE COATINGS INTERNATIONAL, Vol. 97, 1 (2014)
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Titre : Updating the Mandrel Bend Test for paint coatings Type de document : texte imprimé Auteurs : John Fletcher, Auteur Année de publication : 2014 Article en page(s) : p. 47-48 Langues : Anglais (eng) Catégories : Contraintes (mécanique)
Essais dynamiques
Flexion (mécanique)
Résistance au craquelage
Revêtements -- Appareils et matériels:Peinture -- Appareils et matériels
Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniquesIndex. décimale : 667.9 Revêtements et enduits Résumé : The effects of bending on the elasticity, adhesion and elongation properties of cured coatings on sheet metal are important for assessing the performance of paints in application where the coated metal will be formed after the coating has been applied. To perform satisfactorily in other particular applications the coating must also possess the appropriate flexibilité and toughness to withstand craking when subjected to stresses produced by shrinking or swelling, mechanical abuse and weathering. Note de contenu : - MANDREL BEND TEST STANDARD
- APPARATUS : The conical Mandrel bend tester - The cylindrical Mandrel bend tester
- ASSESSMENT OF TEST PANELS FOR CRACKING
- STATUS OF ASTM D522En ligne : https://drive.google.com/file/d/14Q90h52gAU5ZzJnPJGhpQRCQDmzBvcAf/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20793
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Code-barres Cote Support Localisation Section Disponibilité 16105 - Périodique Bibliothèque principale Documentaires Disponible Utilisation of waste plaintain (Musa paradisiaca) peels and waste polystyrene in the development of reinforced polymer composites / Adewale George Adeniyi in INTERNATIONAL POLYMER PROCESSING, Vol. XXXV, N° 3 (07/2020)
PermalinkUtilization of digital image correlation to improve and reduce material testing / Jared W. Nelson in JEC COMPOSITES MAGAZINE, N° 88 (04/2014)
PermalinkVAE copolymer emulsions in latex paints / Artur Palasz in EUROPEAN COATINGS JOURNAL (ECJ), N° 1 (01/2022)
PermalinkValidation of adhesion characterization methods for antistick coatings applied in cooking systems / Stefano Rossi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 4 (07/2022)
PermalinkValorisation des déchets ligno-cellulosiques pour la préparation d’un nouveau matériau composite PVC/farine des noyaux de dattes / Samira Sahi in MATERIAUX & TECHNIQUES, Vol. 109, N° 1 (2021)
PermalinkValorisation of tannery waste and animal by-product for acoustics applications / Tesfay Gebryergs in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 6 (06/2021)
PermalinkPermalinkWashing away the "Bad hair day" with silicone solutions / C. Fournier in SOFW JOURNAL, Vol. 143, N° 12 (12/2017)
PermalinkWaterborne hybrid (alkyd/styrene acrylic) emulsion polymers and exterior paint applications / Nurullah Kartaloglu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 5 (09/2023)
PermalinkWetting additive for water based pressure sensitive adhesives / Gerald Marinzulich in ADHESION - ADHESIVES + SEALANTS, N° 9/2005 (09/2005)
PermalinkWood-polypropylene composites : influence of processing on the particle shape and size in correlation with the mechanical properties using dynamic image analysis / P. Sälzer in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIII, N° 5 (11/2018)
PermalinkWool handbook - Volume 1 / Werner von Bergen / New York [Etats-Unis] : Wiley-VCH (1963)
PermalinkX-ray computed tomography for assessment of mechanical properties and monitoring damage / Abderrahmane Ayadi in JEC COMPOSITES MAGAZINE, N° 113 (06/2017)
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