Hyperbranched polyesters as potential additives to control the surface tension of polymers / K. Grundke in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 88, B2 (05/2005)  

[article]  inSURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 88, B2 (05/2005) . - p. 101-106 Titre : Hyperbranched polyesters as potential additives to control the surface tension of polymers Type de document : texte imprimé Auteurs : K. Grundke, Auteur ; P. Kierkus ; M. Kreitschamann, Auteur ; B. Voit, Auteur ; F. Simon, Auteur ; D. Pleul, Auteur ; S. Michel, Auteur ; A. Ziemer, Auteur ; M. Azizi, Auteur Année de publication : 2005 Article en page(s) : p. 101-106 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alliages polymères Polyesters Polymères ramifiés Spectroscopie de photoélectrons Tension superficielle Index. décimale : 667.9 Revêtements et enduits Résumé : In this study, the authors report on the potential application of hyperbranched polymers as surface tension modifiers in linear polymers or compatibilisers in polymer blends. The influence of hyperbranched polyesters (HBP) with different functional end groups on the surface tension of mixtures with an oligo(ester diol) was investigated. The surface tension of the pure components and of the mixtures was studied within a temperature range of 20°C up to 100°C. The results indicate that the surface tension of the pure HBPs strongly depends on the functionality of the end-groups. The modification of the hydroxyl end groups by short alkyl chains (methyl, tert-butyl) reduced the surface tension, depending on the degree of functionalisation. The surface tension of mixtures could be considerably decreased using 1% HBP that was partially substituted with short alkyl chains. In this case, the modified HBPs acted as surface active agents. On the molecular level, the enrichment of the modified HBP in the surface region was proven by XPS (x-ray photoelectron spectroscopy) measurements. DOI : 10.1007/BF02699540 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699540.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5422 [article]

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Influence of additives on interfacial phenomena during film formation of powder coatings / Petra Uhlmann in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 73, N° 915 (04/2001)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 73, N° 915 (04/2001) . - p. 59-65 Titre : Influence of additives on interfacial phenomena during film formation of powder coatings Type de document : texte imprimé Auteurs : Petra Uhlmann, Auteur ; K. Grundke, Auteur Année de publication : 2001 Article en page(s) : p. 59-65 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Formation de film Interfaces solide-liquide Revêtement poudre -- Additifs:Peinture poudre -- Additifs Rhéologie Tension superficielle Viscosité Index. décimale : 667.9 Revêtements et enduits Résumé : Film formation of powder coatings is illuminated from a physico-chemical point of view. Significant parameters influencing the film formation of powder coatings are surface (wetting) tension and viscosity of the polymer melt formed during the film formation process. A newly developed measuring device for the investigation of wetting at elevated temperatures is presented. This devise allows systematic investigations of the temperature dependence of the wetting tension of powder coating binder systems. By combining analytical and surface tension measurements, it was possible to gain new information about the mechanism of action of additives in these melts. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5726 [article]

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Surface analysis of particles / C. Bellmann in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 89, B1 (03/2006)  

[article]  inSURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 89, B1 (03/2006) . - p. 69-75 Titre : Surface analysis of particles Type de document : texte imprimé Auteurs : C. Bellmann, Auteur ; N. Petong, Auteur ; A. Caspari, Auteur ; W. Jenschke, Auteur ; F. Simon, Auteur ; K. Grundke, Auteur Année de publication : 2006 Article en page(s) : p. 69-75 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Electro-osmose Electrocinétique (effets d'interface) Mouillage (chimie des surfaces) Particules (matières) -- Analyse Pigments Potentiel zeta Revêtements organiques Spectroscopie de photoélectrons Surfaces -- Analyse Tension superficielle Index. décimale : 667.9 Revêtements et enduits Résumé : Normally, commercial coatings are filled with small particles in the form of pigments or fillers. The general properties of surface coating systems significantly depend on the stability of such systems, and on the interaction forces between polymer matrix and particle. The knowledge about the mechanism of these interaction forces enables us to control the lacquer properties. One of the well known physical models of colloid stability is given by the Derjaguin, Landau, Verwey and Overbeek (DLVO) Theory. In this case, it is necessary to know the electrokinetic potential of the used particles. In this paper, the authors demonstrate two new methods of measuring the electrokinetic potential of such particles: namely streaming potential measurements with a special cell and electro-osmosis. The basic requirement to combine pigment particles with the polymer matrix is a good wetting of these particles by the polymer melt. It is possible to assess the wetting properties from a knowledge of the surface tension of both components. The method of capillary penetration was used to determine the surface tension of these particles. In this paper, the authors will discuss some parameters that should be considered for the interpretation of capillary penetration experiments. Note de contenu : - EXPERIMENTAL : Electrokinetics - Surface tension - X-ray photoelectron spectroscopy - RESULTS AND DISCUSSION : Electrokinetic results DOI : 10.1007/BF02699617 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699617.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37524 [article]

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