Differential Scanning Calorimetry (DSC)

Differential scanning calorimetry is commonly used to evaluate various properties of polymeric materials. The technique allows researchers to observe thermal transitions such as glass transition and melt point temperatures in addition to oxidation or other chemical reactions.

Observing thermal transitions is a useful way of comparing materials and identifying unknown materials. By examining thermograms, the existence and quantity of impurities or additives can be determined. 

Differential Scanning Calorimetry (DSC) measures the rate of energy absorption or evolution over the initial melt, crystallization, and re-heat melt phase. The heat flow into or from a sample can also be measured while held under isothermal conditions. DSC can be used to characterize a range of materials, including polymers, fibers, films, thermosets, elastomers, composites, organics, and inorganics.

DSC testing can indicate polymeric material degradation through an observed decrease in an expected melting point.  There is a link between the melting point of a polymer and its molecular weight. This means that excessive thermal exposure could result in a polymer having a lower than expected melting point. Comparing the heat data collected at constant heating rates provides us with an insight into the processing methods and material properties.

A variety of important material properties can be determined via DSC:

  • Glass Transition (Tg) 
  • Melting Points (Tm)
  • Crystallization Temperature (Tc)
  • Percent Crystallinities
  • Oxidative Stabilities
  • Heat Capacities

Our labs are equipped with DSC testing machines with a calibrated temperature range of -80°C to 600°C and heating rates from 0.01°C to 300°C per minute. Our DSC machines utilize the power compensated principle, and sample and reference materials are each held in a separate, self-contained furnace with its own heater element. The machines are also equipped with auto-samplers.

For more information, please contact us.

Common Test Protocols

BS ISO 11357

Covering: Glass transition temperature (Tg), Temperature and Enthalpy of melting and crystallization, Specific Heat Capacity, Oxidation Induction Time

ASTM D1519

Rubber Chemicals - Determination of Melting Range

ASTM D3418

Transition Temperatures and Enthalpies of Fusion and Crystallization of Polymers by Differential Scanning Calorimetry

ASTM D3895

Oxidative-Induction Time of Polyolefins by Differential Scanning Calorimetry


Enthalpies of Fusion and Crystallization by Differential Scanning Calorimetry

ASTM E1356

Assignment of the Glass Transition Temperatures by Differential Scanning Calorimetry

ASTM E2160

Heat of Reaction of Thermally Reactive Materials by Differential Scanning Calorimetry