Differential Scanning Calorimetry (DSC)

DSC: Thermoplastic: Heat Flow vs.
Temperature for Heat/Cool/Heat
Heat Flow (W/g)
0.4
0.2
0.0
-0.2
-0.4
-0.6
Second Heat
191.41°C
First Heat
Cool
223.01°C
48.03J/g
-0.8
20 40 60 80 100 120 140 160 180 200 220 240 260 280
Temperature (°C)
DSC: Selecting Experimental Conditions
�Thermoplastic Polymers (con't)
Interpreting Heat-Cool-Heat Results:
One of the primary benefits of doing Heat-Cool-Heat is for the
comparison of two or more samples which can differ in
material, thermal history or both
�If the materials are different then there will be differences in the Cool and
Second Heat results
�If the materials are the same and they have had the same thermal history
then all three (H-C-H) segments will be similar
�If the materials are the same but they have had different thermal histories
then the Cool and Second Heat segments are similar but the First Heats
are different