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  • 1
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 138 (1970), S. 265-278 
    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: The conversion of pyromellithic acid dianhydride with bis-amidrazones has been investigated. Polyacyl-amidrazone-carbonic acids (A) are formed (addition), which are soluble in numerous organic solvents. For example, foils may be produced from these solutions.When these polymers are thermally treated, at first polyimidoamidines (B) are formed while water is released. On further heating, these polyimidoamidines condense to polytriazole-iso-indolones (C). B and C are insoluble in organic solvents, some of these compounds are stable up to temperatures of 450-500°C.
    Notes: Die Umsetzung von Pyromellithsäuredianhydrid mit Bisamidrazonen wurde untersucht. Es entstehen dabei unter Addition Polyacylamidrazoncarbonsäuren (A), die in zahlreichen organischen Lösungsmitteln löslich sind. Aus diesen Lösungen lassen sich z. B. Folien herstellen.Bei der thermischen Behandlung dieser Polymeren bilden sich unter Wasseraustritt zunächst Polyimidoamidine (B), die bei weiterem Erhitzen zu Polytriazolo-iso-indolonen (C) kondensieren. B und C sind in organischen Lösungsmitteln unlöslich und einige davon bis zu Temperaturen von 450-500°C stabil.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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