Differential Scanning Calorimetry (DSC)
AMI uses a TA Instruments Discovery DSC250.
In differential scanning calorimetry (DSC), the difference in heat flow rate between the sample and an inert reference is measured as a function of time and temperature. Heat absorbed by the sample gives an endothermic response, and heat released by the sample gives an exothermic response. As we heat up and cool down the sample, heat will either be released or absorbed.
Endothermic Response (Negative Peak)
- Glass transition
- Melting
- Evaporation/Volatilization
- Enthalpic recovery
- Polymorphic transitions
- Some decompositions
Exothermic Response (Positive Peak)
- Crystallization
- Cure reactions
- Polymorphic transitions
- Oxidation
- Decomposition
DSC can tell us:
- The identification of amorphous & crystalline material
- The identification of phase transitions & changes of state
- Specific heat capacity - measure of molecular mobility
- Heats of fusion & reactions
- Oxidative/Thermal stability
- Reaction kinetics
Our DSC has the following temperature range available: -90°C to 550°C.
Some DSC methods include:
- ASTM D3418
- ASTM D3895
- ASTM D4419
- ASTM D4591
- ASTM D5028
- ASTM E793
- ASTM E794
- ASTM E1269
- ASTM E1356
- ASTM E1782
- ASTM E2160
- ASTM E2716
