Some features of the thermal oxidation of polyacrylonitrile in the presence of cobalt tetraphenylporphyrin

Structurization of PAN during thermal oxidation treatment was studied. Additions of cobalt tetraphenylporphyrin (0.5 - 1.5%) accelerate the conversion of nitrile groups and the formation of polyconjugated structures containing -C=N-groups. As a result, the peak of the heat of the structurization reaction shifts to lower temperatures, the oxygen absorption rate decreases, and the yield of volatile decomposition products decreases.