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Hydrophobic coatings from emulsion polymers / D. R. Bassett in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 73, N° 912 (01/2001)
[article]
Titre : Hydrophobic coatings from emulsion polymers Type de document : texte imprimé Auteurs : D. R. Bassett, Auteur Année de publication : 2001 Article en page(s) : p. 43-55 Note générale : Bibliogr. Langues : Américain (ame) Tags : Matériau revêtement Peinture eau émulsion Résistance Hydrophobicité Formulation Liant Polymérisation Vinylique ester polymère Polymère ramifié acétate copolymère Latex Teneur oxygène Propriété physique mécanique Feuil frottement Absorption Acrylate Paramètre solubilité Utilisation anticorrosion Bâtiment Article synthèse Index. décimale : 667.9 Revêtements et enduits Résumé : One of the chief requirements of protective coatings is the abilitity to confer water resistance to painted substrates. To accomplish this task, the coating itself must be water resistant but should also possess the additional performance properties expected of modern coatings. Branched vinyl esters provide the building blocks for preparing very hydrophobic binders by emulsion polymerization. Not only do these monomers have favorable reactivity with vinyl acetate but they also react affectivity with acrylates and can be formulated into a wide range of performance coatings. Hydrophobic polymers find use in a wide range of applications including architectural paints, building products and corrosion resistant coatings. In addition to the design of reliable measurements of water resistance, it would be beneficial to be able to predict the water sensitivity of materials based on composition. Calculations of oxygen contents and solubility parameters of polymers are proposed as useful approaches to estimating the hydrophilicity of coatings in order to define the hydrophilic limit imposed on coating by various water resistance tests. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5686
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 73, N° 912 (01/2001) . - p. 43-55[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001220 - Périodique Bibliothèque principale Documentaires Disponible Influence of processing parameters on the fiber length and impact properties of injection molded long glass fiber reinforced polypropylene / M. Rohde in INTERNATIONAL POLYMER PROCESSING, Vol. XXVI, N° 3 (07/2011)
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Titre : Influence of processing parameters on the fiber length and impact properties of injection molded long glass fiber reinforced polypropylene Type de document : texte imprimé Auteurs : M. Rohde, Auteur ; A. Ebel, Auteur ; Felipe Wolff Fabris, Auteur ; Volker Altstädt, Auteur Année de publication : 2011 Article en page(s) : p. 292-303 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Composites à fibres de verre -- Moulage par injection
Composites thermoplastiques -- Moulage par injection
PolypropylèneTags : 'Composites fibres verre' Polypropylene 'Analyse paramètre moulage' 'Etude impact' 'Longueur fibre' Index. décimale : 668.4 Plastiques, vinyles Résumé : Injection molding of long fiber-reinforced thermoplastics is a well-established method in automotive industry to produce high quality structural parts in mass production without the need of further finishing, where the performance is strongly dependent on the fiber length. It is known that the processing parameters have to be carefully chosen as they directly influence the final fiber length and can therefore have a negative effect on the resulting mechanical properties of the part. Particularly in terms of impact behavior, the fiber length is seen as a key factor. The aim of the present work is to quantify the effects of the injection molding parameters on the impact behavior of long fiber reinforced compounds. In a first step the resulting fiber length of injection molded glass fiber reinforced polypropylene is analyzed as a function of the injection velocity, holding pressure, revolution speed and back pressure. The single steps of fiber length analysis are carefully investigated in terms of feasibility and accuracy, in order to assure that a reproducible and reliable test method is employed. Subsequently, the impact behavior of the PP-GF compounds is quantified by falling dart experiments, and the results are then correlated to the fiber length and the processing parameters to establish a fundamental processing-structure-property relationship. The investigation of the fiber length analysis shows that a high pyrolysis temperature leads to embrittlement of the glass fibers and a decrease of tensile strength of the single fibers. This may consequently lead to incorrect characterization of the fiber length due to fiber breakage. The results of the statistical investigation of the processing parameters indicate a significant influence of the back pressure on both impact energy and fiber length. Note de contenu : - EXPERIMENTAL : Materials - Fiber length - Single fiber tensile testing - Injection molding - Mechanical characterization - Characterization of morphology
- RESULTS AND DISCUSSION : Fiber length analysis - Impact properties and fiber lengthDOI : 10.3139/217.2442 En ligne : https://drive.google.com/file/d/1T2PBcVKE0DAN6yOLE16GbpGa8joFaFbv/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12408
in INTERNATIONAL POLYMER PROCESSING > Vol. XXVI, N° 3 (07/2011) . - p. 292-303[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 013159 - Périodique Bibliothèque principale Documentaires Disponible