The thermal behaviour (from 20 to 500°C) of high-molecular polyoxyethylene-urea mixtures which formed a molecular complex
was investigated by means of a derivatograph. Under the conditions of the investigation, there were no indications of an interaction
between the thermal decomposition products and the initial components, or of new intermediates with a thermostabilizing effect.
A linear coorelation was obtained between the mass loss at 250°C and the urea content of the mixture, which may be used to
determine the urea content of similar mixtures.