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  • 1975-1979  (7)
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Year
  • 1
    facet.materialart.
    Unknown
    Analyse et Definition chez Kant (1975)
    Berlin : Periodicals Archive Online (PAO)
    Kant-Studien. 66:1 (1975) 3 
    Details
    ISSN: 0022-8877
    Topics: Philosophy
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:0171-1975-066-01-000002
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Structural disjoining pressure in thin films of liquid crystals (1977)
    Springer
    Colloid & polymer science 255 (1977), S. 1133-1135 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01549904
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Structural disjoining pressure in thin films of liquid crystal (1977)
    Springer
    Colloid & polymer science 255 (1977), S. 1003-1004 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01776208
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Films minces de cristal liquide nématique sur support liquide Structure, tensions superficielles et tension de ligne (1978)
    Springer
    Colloid & polymer science 256 (1978), S. 666-681 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Abstract The structure of a liquid crystal (L.C.) thin film on water has been studied optically and the molecular orientation at its interfaces has been deduced. The surface tension shiftδy corresponding to the orientation of the molecules either normal or parallel to the free surface has been deduced. From the study of the formation and of the stability of holes in the thin film we deduce the order of magnitude of the line tension ϰ. This tension originates in the elastic deformation of LC in the neighbourhood of the hole.
    Notes: Résumé L'étude de la structure d'un film mince de cristal liquide nématique (le 4-4'-pentyl-cyanobiphenyl) sur l'eau permet de déterminer l'orientation des molécules dans le volume et aux interfaces et d'en déduire la variationδy =y ∥ -y I de la tension superficielle selon que les molécules seraient orientécs parallélement (y ∥) ou perpendiculairement (y I) à la surface libre. De l'emistence et de la stabilité de trous dans le film mince, on déduit Fordre de grandeur de la tension de ligneϰ. Cette tension de ligne est comparée aux tensions de ligne de déformation élastique du cristal liquide.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01784409
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  • 5
    Electronic Resource
    Electronic Resource
    Structural disjoining pressure in thin film of liquid crystals I.: Thermodynamics and Frederiksz transition with surface fields (1978)
    Springer
    Colloid & polymer science 256 (1978), S. 784-792 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary Thin films (0,2 – 10μm) of a nematic liquid crystal NLC: 4-4′-pentylcyanobiphenyl (5CB) have been spread on large surfaces of water. The orientation of the molecules has been examined between crossed polarizer und analyzer und by studying the average retardation of white light as a function of film thickness. Ath T ≌ 2.2μm a Frederiksz transition takes place owing to the balance of elastic and surface forces acting on the film and determining the molecular orientations in bulk at the surface as a function of films thickness. From this variation andh T , an anisotropy of surface tension of 5CB of the order of 10−6 Jm−2 is found. This weak anisotropy determines also the variation of the structural disjoining pressure und the film stability which is discussed at length. A thermodynamic potential for this films is suggested.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01438035
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  • 6
    Electronic Resource
    Electronic Resource
    Structure, free energy of adhesion and disjoining pressure in a solid-nematic thermotrope system (1976)
    Springer
    Colloid & polymer science 254 (1976), S. 492-496 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Monomolekulare Schichten von Hexadecyltrimethylammoniumbromid erzeugen homeotrope oder planare Anordnung von Flüssigkristallen wie p-nMethoxybenzilidin-anilin und p-Methoxyphenylazo-p′-butylbenzol.
    Notes: Summary Monolayers of hexadecyltrimethylammonium bromide produce homeotropic or planar alignments of liquid crystals p-n-methoxybenzilidene aniline and pmethoxyphenylazo-p-butylbenzene. The effect of the temperature on the free energy of adhesion and on the wetting hysteresis shows that for the planar structure at the solid-liquid interface a thick liquid film is formed on the solid; the existence of this thick liquid film is attributed to the elastic energy imposed on a liquid crystal by different anchorages at the solid-liquid and liquid-vapor interfaces.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01410916
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  • 7
    Electronic Resource
    Electronic Resource
    Thin films of nematic liquid crystal on liquid substrate. Bulk and surface structures, surface and line tensions (1976)
    Springer
    Colloid & polymer science 254 (1976), S. 672-673 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary The structure of a liquid crystal (L.C) thin film on water has been studied optically and the molecular orientation at its interfaces has been deduced. The surface tension shiftΔγ corresponding to the orientations of the molecules either normal or parallel to the free surface has been deduced. From the study of the formation and of the stability of holes in the thin film we deduce the order of magnitude of the line tensionx. This tension originates in the elastic deformation of LC in the neighbourhood of the hole.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01753697
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    Paper (German National Licenses)
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