Is it thermal stable or not and why 60 10 50 100 150 200 25

60 -10 50 100 150 200 250 300 350 400 450 Temperature (c) TGA Curve so 100 150 200 250 300 400 450 350 Temperature (c)

Solution

If a specimen is thermally stable over a temperature range, it shows negligible degradation of mass. The trace has little slope in the region of stability.

Since in the trace provided there is significant degradation of material even for low temperature values, hence it is THERMALLY UNSTABLE.