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  • 1995-1999
  • 1980-1984  (1)
  • 1981  (1)
  • Eutectoid multicomponent systems  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 259 (1981), S. 611-624 
    ISSN: 1435-1536
    Keywords: Crosslinked polyethylenes ; Thermodynamics ; Eutectoid multicomponent systems ; SAXS ; Melting ; Structure
    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 Zur quantitativen Beschreibung des Schmelzens strahlenvernetzter Polyäthylene wird die Thermodynamik eutektoider Systeme modifiziert. Die Charakterisierung dieser polymeren Netzwerke wird durch Elektronenmikroskopie, Röntgenweitwinkelstreuung und DTA-Messungen vorgenommen. Die Auswertung der Experimente liefert Strukturparameter, deren Kenntnis eine quantitative Berechnung von SAXS-Messungen erlaubt. Diese Berechnung ist im Schmelzbereich nur auf der Grundlage eines Umordnungsmodells" möglich. Ein solcher Ablauf des Schmelzprozeßes kann aus den prinzipiellen Eigenschaften eutektoider Vielteilchensysteme verständlich gemacht werden.
    Notes: Summary The thermodynamics of the melting in eutectoid copolymers is successfully applied to molecular networks of polyethylene. The characterization of these crystallized systems with varying densities of crosslinks is in accord with electron microscopic observations, with WAXS-results and with calorimetric measurements, thus, allowing a quantitative description of SAXS-measurements dependent on temperature. A mechanistic interpretation of the melting process is presented which can be justified from the principle of the crystallization- and melting behaviour in eutectoid multicomponent systems. This interpretation applies equally well to eutectoid copolymers with no permanent crosslinks, thus, underlining the general validity of the theorectical approach.
    Type of Medium: Electronic Resource
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