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Experimental investigation on mechanical and thermo-mechanical properties of alumina filled polypropylene composites using injection molding process / Deepak Kumar in INTERNATIONAL POLYMER PROCESSING, Vol. XXXII, N° 3 (07/2017)
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Titre : Experimental investigation on mechanical and thermo-mechanical properties of alumina filled polypropylene composites using injection molding process Type de document : texte imprimé Auteurs : Deepak Kumar, Auteur ; G. S. Dangayach, Auteur ; P. N. Rao, Auteur Année de publication : 2017 Article en page(s) : p. 316-325 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alumine
Charges (matériaux)
Composites -- Moulage par injection
Composites -- Propriétés mécaniques
Composites -- Propriétés thermomécaniques
Composites thermoplastiques
PolypropylèneIndex. décimale : 668.4 Plastiques, vinyles Résumé : In the present study, Polypropylene composites were fabricated by varying different weight percentages (0 to 20%) of alumina powder by using Injection Molding Technique. Then the fabricated composites were characterized by physical characterization such as void content test, chemical characterization such as Fourier-transform infrared spectroscopy, mechanical characterization such as Shore hardness test, flexural test, compressive strength, Izod impact test, thermo-mechanical characterizations such as Dynamic Mechanical Analysis, Thermo-gravimetric analysis and morphological characterizations such as Scanning Electron Microscopy (SEM) and Atomic force Microscopy (AFM). The results indicate that the shore hardness values increase up to 25% with the increase in alumina filler up to 20%. The highest flexural strength and flexural modulus achieved are 59.26 MPa and 2126 MPa respectively with 20% filler loading. Further, it was also revealed that the storage modulus of the composites was found to be higher than that of the virgin PP because filler increases the stiffness of the composites. Thermo-gravimetric analysis (TGA) measurements indicate that both the initial degradation temperature and end degradation temperature increase with increasing filler content. SEM exhibits that alumina particles were uniformly and finely dispersed though some aggregates and agglomerates are identifiable. AFM results indicate that morphology of alumina in the PP matrix is characterized by a chainlike branched structure. Note de contenu : - EXPERIMENTAL : Selection of raw materials - Preparation of composite using plastics injection molding technique - Characterization of the samples
- RESULTS AND DISCUSSION : FTIR spectra of alumina filled polypropylene composites - Effect of void content on alumina filled polyprpylene composites - Effect of shore hardness on alumina filled polypropylene composites - Effect of impact strength on alumina filled polypropylene composites - Effect of flexural properties on alumina filled polypropylene composites - Effect of compressive strength on alumina filled polypropylene composites - Dynamic mechanical analysis - Thermo-gravimetric analysis (TGA) - Scanning electron microscopy - Atomic force microscopy (AFM)DOI : 10.3139/217.3323 En ligne : https://drive.google.com/file/d/1Cp0fErLrNIF8T2Mh7x3QEcNsQ5bNKwmA/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28833
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXII, N° 3 (07/2017) . - p. 316-325[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19064 - Périodique Bibliothèque principale Documentaires Disponible Fabrication of superhydrophobic surfaces via poly(methyl methacrylate)-modified anodic aluminum oxide membrane / Xinhua Chen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 5 (09/2014)
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Titre : Fabrication of superhydrophobic surfaces via poly(methyl methacrylate)-modified anodic aluminum oxide membrane Type de document : texte imprimé Auteurs : Xinhua Chen, Auteur ; Xinyu Cao, Auteur ; Guangming Chen, Auteur ; Yongmei Ma, Auteur ; Fosong Wang, Auteur Année de publication : 2014 Article en page(s) : p. 711-716 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alumine
Hydrophobie
Métaux -- Oxydation anodique
Microstructures
Nanostructures
Polyméthacrylate de méthyleLe poly(méthacrylate de méthyle) (souvent abrégé en PMMA, de l'anglais Poly(methyl methacrylate)) est un polymère thermoplastique transparent obtenu par polyaddition dont le monomère est le méthacrylate de méthyle (MMA). Ce polymère est plus connu sous son premier nom commercial de Plexiglas (nom déposé), même si le leader global du PMMA est Altuglas International9 du groupe Arkema, sous le nom commercial Altuglas. Il est également vendu sous les noms commerciaux Lucite, Crystalite, Perspex ou Nudec.
PolystyrèneIndex. décimale : 667.9 Revêtements et enduits Résumé : Superhydrophobic surfaces were prepared by poly(methyl methacrylate) (PMMA) or polystyrene (PS) modification on an optimized anodic aluminum oxide (AAO) honeycomb-like structure surface. The AAO membrane was initially etched in sodium hydroxide solution to get a hierarchical polygon-cavity structure in micro- and nano-scales, and then, it was coated with the polymer solution. The obtained polymer-modified AAO films show superhydrophobicity with water contact angles of larger than 150°. The intrinsic contact angles of the PMMA and PS are 68° and 94°, respectively. The morphology and components of the micro-/nano-structure were characterized by SEM and XPS, respectively, and the mechanism is discussed. This work provides a simple method to obtain superhydrophobic surfaces by common polymers without the need for low surface energy compounds. DOI : 10.1007/s11998-013-9543-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9543-x.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22053
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 5 (09/2014) . - p. 711-716[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16538 - Périodique Bibliothèque principale Documentaires Disponible Fluidisation improvements / Laurent Fosbach in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 195, N° 4488 (05/2005)
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Titre : Fluidisation improvements Type de document : texte imprimé Auteurs : Laurent Fosbach, Auteur Année de publication : 2005 Article en page(s) : p. 35-38 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alumine
Fluidisation
Particules fines
Revêtement poudre -- Additifs:Peinture poudre -- Additifs
SilicatesIndex. décimale : 667.9 Revêtements et enduits Résumé : The author explores the developments in fluidisation of additives for powder coatings.
All powder coating systems that use either tribo-charging or corona-ion equipment require a flow additive to optimise performance and prolong the stability of the coating material in storage during spraying and handling.
Powder cohesion is the result of structural forces within the material that compete in various ways, depending on particle size, humidity and particle composition, with the gravitational forces experienced by the particles.
When dry particle are larger than 75 microns, gravitational forces are greater that the structural or interparticle forces, and particle-particle attractions are negligible. As a result, powder can fluidise and flow with much less energy, since the particle can move independently of one another.
When particles are less than 75 microns, structural forces tend to dominate and the resultant particle-particle interaction lead to a powder that is usually cohesive and will fluidise and flow poorly. This is particularly the case with particles 25 microns or less. Flow additives such as fumed silicate or fumed alumina, overcome this problem of they have the appropriate size distribution and an affinity with host particle's surface, a random mixture results. In this case the flow additive and host particle tend to self-associate and produce pockets of additive within a matrix of host particles.Note de contenu : - ORDERED RANDOM MIXTURES : Advantages - Treatment - Hausner ratio
- ADDITION
- IMPROVEMENTSPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27639
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 195, N° 4488 (05/2005) . - p. 35-38[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001971 - Périodique Bibliothèque principale Documentaires Disponible Fumed metal oxide dispersions expand aqueous inkjet printing substrates / Tianqi Liu in COATINGS WORLD, Vol. 24, N° 3 (03/2019)
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Titre : Fumed metal oxide dispersions expand aqueous inkjet printing substrates Type de document : texte imprimé Auteurs : Tianqi Liu, Auteur ; Koen Burger, Auteur Année de publication : 2019 Langues : Américain (ame) Catégories : Alcool polyvinylique
Alumine
Couche de base
Dispersions et suspensions
Encre en phase aqueuse
Floculation
Impression jet d'encre
Liants
Matières plastiques -- Revêtement
Oxydes métalliques
Polyéthylène téréphtalate
Polyuréthanes
Potentiel zeta
Revêtements organiques
SiliceLa silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux.
La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...).
Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale.Index. décimale : 667.9 Revêtements et enduits Résumé : As aqueous inkjet continues to take market shares from traditional printing techniques, it must expand its substrates from traditional office paper to a broader spectrum of substrates used for packaging, signage and labels. CAB-O-SPERSE® silica and alumina dispersions can help prime difficult substrates to work with aqueous inkjet inks because of the porosity they generate and their surface charge characteristics. These dispersions enable the formulation of precoats that can greatly enhance optimized image quality such as high color saturation, less mottle and wet smudge resistance. They also offer stability and flexibility in the waterborne coating systems. Note de contenu : - Fumed metal oxide dispersions - key component in an aqueous inkjet receptive coating
- Dispersions offer stability and flexibility in waterborne coatings
- Fig. 1 : Examples of aqueous inkjet printing issues due to slow liquid removal from the printing surface
- Fig. 2 : Pore volume distribution in coatings made with fumed metal oxide dispersions
- Fig. 3 : Kyocera test bed printing at 250 feet/min of an aqueous inkjet ink sets on PET substrates. A: original PET film ; B : PET film precoated with PG003 dispersion and a polyurethane binder ; C : timed finger smear test on cyan color printed on the precoated PET
- Fig. 4 : Kyocera test bed printing at 250 feet/min of an aqueous inkjet ink set on a porous substrate. Three secondary colors (blue, red and green) and one composite black (cyan, magenta and yellow) are printed. A : original paper liner for corrugated board ; B : paper liner precoated with PG003 dispersion and a polyurethane binder
- Fig. 5 : Schematic illustration of an inkjet receptive coating made using a silica dispersion and a polymer binder
- Fig. 6 : Zeta potential curves for two representative silica dispersions
- Fig. 7 : Stability of a fumed silica dispersion (2020K) on the left vs a surface modified calcium carbonate dispersion (on the right) in the presence of a polyvinyl alcohol binder after overnight
- Fig. 8 : Photos of an image under films coated on PET. A : coating made using dispersion 4012K ; B : coating made using dispersion 1030K
- Fig. 9 : Flocculation in a cationic coating system with low charge density cationic silica and a cationic polymer latex
- Fig. 10 : Coating solution stability at t=1hr and t= 1 month when cationic silicas are mixed with a cationic charged polyurethane binder. Vial on the left : low charge density cationic silica; vial on the right : higher charge density cationic silicaEn ligne : https://www.coatingsworld.com/issues/2019-03-01/view_technical-papers/fumed-meta [...] Format de la ressource électronique : Html Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32509
in COATINGS WORLD > Vol. 24, N° 3 (03/2019)[article]Functionalised powder coatings for polymers / Andreas Rank in EUROPEAN COATINGS JOURNAL (ECJ), N° 11 (11/2021)
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Titre : Functionalised powder coatings for polymers : Using nanomaterials to improve crucial surface properties Type de document : texte imprimé Auteurs : Andreas Rank, Auteur ; Felipe Wolff Fabris, Auteur ; Timothy Aschl, Auteur ; Anton Paar, Auteur Année de publication : 2021 Article en page(s) : p. 22-26 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alumine
Angle de contact
Antimicrobiens
Antiviraux
Argent
Dioxyde de silicium
Dioxyde de titane
Energie de surface
Essais (technologie)
Fluidisation
Hydrophobie
Nanoparticules
Polycarbonates
Résistance à l'abrasion
Revêtements poudre
Surfaces fonctionnellesIndex. décimale : 668.4 Plastiques, vinyles Résumé : By incorporating nanoparticles into a low-temperature powder coating it is possible to specifically modify polymer surface properties and impact fluidisation and application. However, the nanoparticle type and concentration affect powder properties such as cohesion strength, fluidisation point and air-holding capacity in different ways and must be investigated and validated to avoid problems in production. Note de contenu : - Nano-modified coating to improve functionality
- Testing set-up
- Positive influence on key properties
- Powder coating experiments
- Superhydrophobic properties dependent upon nanomaterial
- Strong antimicrobial effect
- Good antiviral effect
- Enhanced scratch resistance
- Table 1 : Cohesion strength, air-holding capacity and fluidisation points of the modified powder coatings
- Table 2 : Contact angle of the polycarbonate reference and the coated substrates
- Table 3 : Surface energies of the powder coatings
- Table 4 : Antimicrobial test results
- Table 5 : Antiviral test results for the powder-coated samples
- Table 6 : Summary scratch resistance of the modified powder coatingEn ligne : https://drive.google.com/file/d/1FkfZ_NBw9a1Er8qfq7gBT6kTx1nI4cPu/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36479
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 11 (11/2021) . - p. 22-26[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23041 - Périodique Bibliothèque principale Documentaires Disponible Hard minerals enhance powder coating performance / Kevin M. Biller in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 212, N° 4673 (02/2022)
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