Differential TMA—Theory and Applications

Presented by Adam Harris and Meaghan Fielding


Meaghan working with the Rigaku TMA

Thermomechanical Analysis (TMA) is a technique in which a non-oscillatory load is applied such as in compression or tension, measuring the changes in the sample shape when the sample is heated or cooled. The TMA method includes measurement modes such as compression loading method, tensile loading method, and penetration method based on the sample shape and the objective of the measurement. TMA is widely used to measure the thermal expansion, softening temperature, glass transition temperature, and sintering of a sample. 

Rigaku’s TMA adopts the differential expansion principle that cancels the thermal expansion or shrinkage generated from the detection mechanism itself. 

Sample controlled TMA (SCTMA), where the shrinkage rate controls the temperature, can be installed as an option that is effective for the simulation of sintering in ceramics, production of sintered materials with suppressed grain growth. 

TMA and DSC analysis on a polyethylene terephthalate (PET) pellet

TMA is a complementary measurement technique to Differential Scanning Calorimetry (DSC) and/or Simultaneous Thermal Analysis (STA). All data is analyzed on the same software with a single PC, so different measurements can easily be overlayed. In the above image, we can see an overlay of DSC (blue curve) and TMA (red curve) for a PET sample. Thus, we are able to easily correlate dimensional changes with heat events.

This webinar will interest anyone working with glass, ceramics, metals, polymers, and films.

Learn more about Rigaku’s products exclusively offered by C-Therm in the US here.


This webinar aired on May 26, 2022 @ 2:00PM GMT-3.

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