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  • 1965-1969  (1)
  • 1
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 100 (1967), S. 91-99 
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Neue Dicarbonsäuren, die ein oder zwei 1,3,4-Oxadiazol-Ringe im Molekül enthalten, wurden durch Reaktion zwischen Orthoestern und Säurehydraziden gebildet. Diese Dicarbonsäuren haben die folgenden Strukturen: und R = Phenylen oder Alkylen und n = 1-4Die Polyamide von p-Xylylendiamin mit diesen Dicarbonsäuren wurden ebenfalls hergestellt. Diese Polymeren sind unlöslich in m-Kresol, aber löslich in konz. Schwefelsäure. Die Schmelzpunkte dieser Polyamide liegen über 350deg;C. Mit aliphatischen Polyamiden wurden Copolyamide mit hohen Molgewichten erhalten.
    Notes: Novel dicarboxylic acids containing one or two 1,3,4-oxadiazole rings in a molecule were synthesized by the reaction between orthoesters and acid hydrazides These dicarboxylic acids have the following structures: and where R represents a phenylene or an alkylene group and n = 1-4.The polyamides from p-xylylenediamine with these dicarboxylic acids were also prepared. The polymers are generally insoluble in m-cresol but soluble in conc. sulfuric acid. The melting points were estimated at above 350°C. Copolyamides of high molecular weights with aliphatic polyamides were obtained.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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