Dynamic Thermo-Mechanical Analysis (DTMA) is an analytical method to determine the thermo-mechanical properties, under a dynamic load, of a plastic during heating and cooling. The tests provide a modulus of elasticity (or storage modulus G’), a loss modulus G33 and a dampening modulus (Tan Delta) in function of frequency and time. DTMA allows to detect very small transitions that cannot be detected by DSC.
A standardised sample is installed between movable and fixed clamps.
- Single of Dual Cantilever clamp
- 3-point bending
- Tension mode
By means of the mobile clamp a well-defined oscillation is introduced into the sample, raising the temperature gradually.
In function of the temperature, frequency and tension, the following data are measured:
- E-modulus (E’ – Storage modulus)
- Viscosity modulus (E” – Loss modulus)
- Dampening modulus (Tan delta)
- Determination of glass transition
- Determination of the transition stages in plastics
- Creep and relaxation behaviour at different temperatures