DSC

Differential Scanning Calorimeter (DSC) from TA Instruments, measures the difference in heat absorbed or released by sample, as compared to an inert reference (empty pan), as both are heated, cooled or held at constant temperature (isothermal). Exothermic transitions result in the release of heat: crystallization, curing, decomposition, etc. Endothermic transitions absorb heat: melting, glass transition, evaporation, etc. DSC 2500 using the Tzero technique provides significant improvements in baseline flatness, transition, resolution and sensitivity.

Equipment
Instrument: 2 TA Instruments DSC 2500s with 50 position autosampler. Sensitivity < 0.2 µW, and baseline drift < 10 µW. One DSC has the LN2 pump as a cooling unit, and the other has the refrigerated cooling system (RCS).

Temperature: Using liquid nitrogen (LN2) pump, temperature range from –150 °C to 400 °C at 10C/min.
Using Refrigerated Cooling System (RCS120), from -50C to 400C at 10C/min.
Please check manual for temperature range vs. ramp rate.

Calibration: Indium. Sapphire was used for heat capacity constant.