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Thermomechanical analysis (TMA) measures dimensional changes, and can be used to determine softening points and the coefficient of thermal expansion.

Expansion Probe		Penetration Probe		Compression Probe		Flexure Probe

The graph below of expansion vs. increasing temperature shows a discontinuity at the glass transition temperature.




Other Thermal Analysis Pages:

Differential Scanning Calorimetry

Dynamic Mechanical Analysis

Thermogravimetric Analysis