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  • Polymer and Materials Science  (4)
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  • 1
    Electronic Resource
    Electronic Resource
    Microphase state of oligobutadienediol-based polyurethaneureasCorrected proofs received March 26, 1984 (1984)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 29 (1984), S. 1919-1927 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Structural studies of oligobutadienediol-based polyurethanes with various degrees of crosslinking were carried out. From absolute small-angle X-ray scattering, the degree of segregation of components was determined. It was concluded that a complete microphase separation of the different components is realized in all samples irrespective of the degree of crosslinking, and these polymers are two-phase systems. While stretching, the fibrillar structure is formed.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1984.070290601
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Thermal effects on liquid-crystalline order in polymers with mesogenic side groups (1984)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Physics Edition 22 (1984), S. 41-47 
    Details
    ISSN: 0098-1273
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: X-ray studies on polymers with phenyl benzoate side groups separated from the main chain by spacer groups of various lengths have been performed. It was found that the dimensions of liquid-crystalline regions are 15-20 nm, and they contain four to six close-packed layers. Thermal changes in x-ray scattering are associated with the variation of sizes and concentration of liquid-crystalline regions determined by the mobility of the main chain.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1984.180220104
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Zur Struktur von p-n-Alkoxybenzoesäureestern im kristallin-flüssigen Zustand (1982)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 33 (1982), S. 63-69 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: A series of polymers having pendant phenylbenzoate groups of different length was investigated by detailled x-ray measurements within a wide range of temperature. Very long flexible terminal chains were found to penetrate each other. Increase in temperature results in improved liquid-crystalline structure of polymers having methacrylate main chains but in less significant structural features with polymers based on acrylate main chains at T 〉 Tg.
    Notes: An einer Polymerreihe mit seitlichen Phenylbenzoatgruppen verschiedener Länge wurden eingehende röntgenographische Untersuchungen in einem weiten Temperaturbereich durchgeführt. Es konnte gezeigt werden, daß sehr lange flexible endständige Ketten ineinander eindringen. Eine Temperaturerhöhung führt zur Verbesserung der kristallin-flüssigen Struktur bei Polymeren mit Methacrylat-Hauptkette und zu einer gewissen Verschlechterung bei Polymeren mit Acrylat-Hauptkette bei T 〉 Tg.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1982.010330111
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Supermolecular organization in liquid crystalline polymers (1985)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 36 (1985), S. 403-412 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Besonderheiten der übermolekularen Strukturierung in flüssig-kristallinen Polymeren mit mesogenen Seitengruppen bzw. mesogenen Gruppen in der Hauptkette werden beschrieben. Es wird gezeigt, daß die nematischen und cholesterischen Mesophasen in den Polymeren makroskopisch geordnete Phasen sind, ähnlich wie in niedermolekularen flüssigen Kristallen. Smektische Polymere sind mikroheterogene Systeme mit komplizierten Ebenen der übermolekularen Struktur, wie Schichtpakete und daraus aufgebaute Aggregate.
    Notes: Features of supermolecular organization in liquid-crystalline polymers with mesogenic side groups and mesogenic groups in the main chains are described. The nematic and cholesteric mesophase in polymers are shown to be macroscopic ordered phases similar to low-molecular liquid crystals. Smectic polymers are microheterogeneous systems with complicated levels of supermolecular structures: layered packs and their aggregates.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1985.010360801
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    Paper (German National Licenses)
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