Characteristic Relaxation Time by DMA (5 Temperatures)
Test ID
R-024
Description
A dynamic mechanical analyzer is used. Test material in the form of pellets is sandwiched between parallel plates of the apparatus, at melt-state temperature. The top plate is oscillated over a frequency range of 0.1 to 500 rad/s, at constant strain. The cross-over point of the G’ and G” curves is determined. Measurements are taken over a range of up to 5 temperatures using the same sample.
Options
Standards
- ASTM D4440
Data
Complex Viscosity v. Frequency, Modulus v. Frequency, aT v. Temperature, Relaxation v. Time Mastercurve. This data appears in Matereality as Melt Rheology by DMA.
Replicates
Number of times this test is repeated: 1
Samples
0.5 kg of pellets [details]
Application
The variation of the crossover frequency with temperature is used to provide a measure of the characteristic relaxation time of the material.
