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A. Orzeszko, A. Kolbrecki


Studies on flammability of polypyromellitimides. An attempted correlation of some physicochemical parameters


Polimery 1982, No 1, 16



DOI: dx.doi.org/10.14314/polimery.1982.016

Summary

The ignition temperatures, oxygen indices and heats of combustion have been determined for a series of polyimides prepared in a typical two-stage synthesis from pyromellitic anhydride and aromatic diamines. A correlation between the temperature difference DТ=Tiso-To and the composition of the products of pyrolysis and rate of decomposition has been found. A relationship between oxygen index (WT) on the one side and temperature of decomposition onset (To), heat of combustion (Qf), activation energy of the pyrolysis process (Ea) and element al composition of polymer under study on the other side has also been demonstrated.


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