Reactions of N,N^′-bis(2-hydroxyethyl)oxalamide with Ethylene Carbonate and Use of the Obtained Products as Components of Polyurethanes Foams

Figure 5

Thermal analysis of the reaction product of BHEOA : EC 1 : 10 in the presence of 0.06 mole K₂CO₃/mole OA at 160^∘C: (a) before heating at 200^∘C, (b) after heating at 160^∘C for 4 hours.

(a)

(b)