DSC Problem- Given that the 2 following Heat curves were taken from the same polymer sample, the first graph being the first heat cycle and the second graph being the second heat cycle comment on the below. 2. 5 147.40C 3 NOTE SMALL START-UP HOOK 1 7495-C78.89C (0 Heat Flow (mW) w 232 32C 40.131/6 137 16C 36.36g -5 FIRST HEAT OF QUENCHED SAMPLE -7 247.81C -9 -50 0 50 200 250 300 100 150 Temperature (C) Dros N 0 73.49C 79.38"C(D) 86.08C 234.890 40.09g -2 Heat Flow (mW) 4 HEATAFTER 10 CAMIN COOL FROM MELT -6 247.95C -8 300 -50 0 50 100 150 200 250 Temperature (C) What is the onset temperature of the glass transition? (1 mark) a. b. How would you describe the second peak in terms of what type of peak it may be, if it is exothermic or endothermic? (2 marks) c. What type of peak is peak 3 and what does the peak temperature indicate? (2 marks) 1