Differential Scanning Calorimetry Test

Material Testing

Differential Scanning Calorimetry Test

Differential scanning calorimetry (DSC) measures specific heat capacity, Transition Temperature, and Temperature of Phase Changes and Melting Points. DSC measures the heat flow rate and compares the difference between the heat flow rate of the test sample and known reference materials.

Differential Scanning Calorimetry Test

As a sample enters a transition (melting, crystallization, etc.), heat is absorbed or emitted. This change in heat flow can then be measured and analyzed by the system. The difference determines the differences in material composition, crystallinity and oxidation.

What is the process of evaluating a DSC instance?

Differential Scanning Calorimetry or DSC is a thermo-analytical technique in which the difference in the amount of heat required to increase the temperature of a sample and reference is measured as a function of temperature. Both the sample and reference are kept at almost the same temperature throughout the experiment.

In general, the temperature program for a DSC analysis is designed to increase the sample holder temperature linearly as a function of time. The reference sample must have a well-defined heat capacity over the temperature range to be scanned.

DSC analysis determines:

  • Tg Glass Transition Temperature: o Temperature (° C) at which amorphous polymers or an amorphous part of a crystalline polymer passes from a hard brittle to a soft rubbery state
  • Tm Melting point: Temperature at which a crystalline polymer melts (° C)
  • M Hm Absorbed Energy (joule / gram): The amount of energy a sample absorbs while melting
  • Tc Crystallization Point: The temperature at which a polymer crystallizes upon heating or cooling
  • Δ Hc Released Energy (joule / gram): The amount of energy released by a sample while crystallizing

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