Accession Number : AD0470669


Title :   THE THERMAL DECOMPOSITION OF 3,5-DIPHENYL-1,2,4- OXADIAZOLE AND 2,5-DIPHENY-1,3,4- OXADIAZOLE.


Descriptive Note : Technical rept,


Corporate Author : ROYAL AIRCRAFT ESTABLISHMENT FARNBOROUGH (ENGLAND)


Personal Author(s) : Knight,G J ; Cotter,J L


Report Date : Jul 1965


Pagination or Media Count : 8


Abstract : Proposed mechanisms for the thermal decomposition of 3,5-diphynyl- 1,2,4-oxadiazole and 2,5-diphynyl- 1,3,4-oxadiazole two high temperature resistant polymer precursors, imply that the molar product ratio of benzonitrile to phenyl isocyanate be 1: 1 in each case. The observed ratios although close to unity lie above this figure; this is rationalized on the basis of a concomitant reaction of phynyl isocyanate to give diphenylcarbodiimide and carbon dioxide. (Author)


Descriptors :   *HEAT RESISTANT PLASTICS , *NITROGEN HETEROCYCLIC COMPOUNDS , *OXYGEN HETEROCYCLIC COMPOUNDS , PYROLYSIS , PYROLYSIS , DECOMPOSITION , CYANATES , NITRILES , CHROMATOGRAPHIC ANALYSIS , MASS SPECTROSCOPY , UNITED KINGDOM


Distribution Statement : APPROVED FOR PUBLIC RELEASE