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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 163 (1988), S. 115-126 
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Bildung zwischenmolekularer Excimer-Gruppen wurde bei Polyethersulfon (PES) in Dichlormethan-Lösungen bei Konzentrationen um 2,7 × 10-2 mol/l durch Fluoreszenzanalyse nachgewiesen. Die Bestrahlung mit Licht ermöglichte auch die Bildung intramolekularer Excimer-Gruppen; dabei legen sich Molekülsegmente parallel, obwohl die Moleküle recht starr sind. Aus Aufnahmen mit dem Elektronenmikroskop wurde gefolgert, daß Polyethersulfon bei längerem Erhitzen auf 200°C von einem amorphen in einen geordneten Zustand übergeht.
    Notes: Formation of intermolecular excimers in polyethersulfone (PES) dichloromethane solutions were observed at a PES concentration about 2.7 × 10-2 mol/l by the fluorescence analysis. External light energy irradiation enabled the formation of intramolecular excimers in the PES dichloromethane solution. These chains can gain an access to each other in parallel though the molecular chains are considerably rigid. The electron micrograph of the PES film, heat treated at 200°C for 72 hours, presented a diffraction micrograph, which suggests that the PES molecular aggregation is changed from a randomly coiled amorphous phase to an ordered one.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
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