STUDY OF THE KINETICS OF THE TRANSFORMATION OF THE CN BOND IN POLYACRYLONITRILE FROM INFRARED ABSORPTION SPECTRA (Izuchenie Kinetiki Prevrashcheniya CN Svyazi v Polyakrilonitrile po Ik-Spektram Pogloshcheniya),
ROYAL AIRCRAFT ESTABLISHMENT FARNBOROUGH (ENGLAND)
Pagination or Media Count:
Polyacrylonitrile films were heated in vacuum at temperatures in the range 205-270C and the rate of disappearance of the nitrile group with time followed by IR spectroscopy. The reaction was the conversion of the nitrile group into a conjugated -CN- structure. In the range 205-235C, transformation with no degradation occurred with an activation energy of 41 K calmole. At 245-270C some degradation occurred and the activation energy for nitrile conversion fell to 21 K calmole.
- Atomic and Molecular Physics and Spectroscopy