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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 152 (1987), S. 41-53 
    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 schwachvernetzten Polyurethane mit Allophanat- und C—C - Bindungen wurden durch die Reaktion von 4,4′-Diphenylmethandiisocyanat mit einer Poly(ethylenadipat)/Poly(ethylenmaleat)-Mischung sowie mit einer Mischung aus Terephthal-Adipinsäure-Copolyesterdiol und niedermolekularen Diolen hergestellt.Die Ergebnisse der isothermen und dynamischen thermischen Analyse in inerter Atmosphäre zeigen, daß die thermische Stabilität der Polyurethane von der Vernetzungsdichte und der chemischen Struktur der Vernetzungsbindungen und der Hart-Segmente unabhängig ist.
    Notes: Polyurethanes slightly crosslinked with allophanate and C—C linkages have been prepared by reaction of 4,4′-diphenylmethane diisocyanate with poly(ethylene adipate) and poly(ethylene maleate) as well as with terephthalic-adipic copolyesterdiol and some low molecular diols.Data obtained from isothermal and dynamic thermogravimetric analysis carried out in an inert atmosphere indicate that the thermal stability of polyurethanes is independent on the crosslinking density and the structural characteristics of crosslinks and hard segments.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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