Differential Scanning Calorimetry (DSC)

ASTM D7426 & ASTM D3418


Differential scanning calorimetry, or DSC, is a thermoanalytical 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. This test method is useful for research, quality control, and specification acceptance.

Test Details

ASTM D7426 This test method covers the assignment of the glass transition temperatures (Tg) of materials using differential scanning calorimetry.

ASTM D3418 This test method covers determination of transition temperatures and enthalpies of fusion and crystallization of polymers by differential scanning calorimetry.

Summary (continued)

Thermal analysis provides a rapid method for measuring transitions due to morphological or chemical changes, in a polymer as it is heated/cooled through a specified temperature range.

Change in specific heat capacity, heat flow and temperature values are determined for these transitions. Differential scanning calorimetry is used to assist in identifying specific polymers, polymer alloys, and certain polymer additives, which exhibit thermal transitions. Chemical reactions that cause or affect certain transitions have been measured with the aid of this technique; such reactions include oxidation, curing of thermosetting resins, and thermal decomposition.

This test method is useful for specification acceptance, process control, and research.

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