<< [[Analytical Techniques MOC]] Differential Scanning Calorimetry (DSC) is a method of studying the [[glass and melting transitions|phase transitions]] of materials by ==measuring the heat flow as the temperature is changed at a constant rate==. A differential scanning calorimeter contains two pans, one which contains the sample to be analyzed and one which acts as a reference. The difference in heat transferred to the sample compared to the reference cell is recorded as the calorimeter is heated and cooled. The output of DSC analysis is a graph of heat flow over temperature, known as a thermogram. ![[glass transition]] ## Examples ### Thermogram of amorphous polypropylene ![[Image 7-1-22 at 12.57 PM.jpg]] ### Thermogram of isotactic polypropylene ![[Image 7-1-22 at 1.10 PM.jpg]]