Temperature sweeps with several testing frequencies

One investigation = triple information! Saving time and money and gaining additional data about your materials in one measurement, can be achieved with multifrequency temperature sweeps. Carry out one temperature sweep and consecutively test with up to 3 frequencies. You will thereby get at the end of a sweep up to 3 complete data files, which clearly document the frequency and temperature dependence of your materials. So – make 3 from 1!

3-Dimensional display of temperature-frequency dependency of an elastomer system

The illustration shows the 3-dimensional plot of the complex modulus of elasticity (E’, E’’) in dependence of temperature and frequency. Characteristic is the shifting of the glass transition with increasing frequency to higher temperatures on the temperature scale. The dynamic range of softening processes during glass transition can be of an order of magnitude of >3 and is dependent on frequency and temperature. Knowledge of the frequency and temperature dependence of dynamically loaded components (e.g. tyres, dampers) is nowadays an essential part of application development.

Strain dependence of filled elastomers

The figure shows the dependence of the complex modulus of elasticity (E’, E’’) and the damping tan delta from the applied deformation amplitude. Significant is the decline of the complex modulus of elasticity as well as an increase of the damping tan delta with increasing strain amplitude. The curves provide information about the transition from linear to non-linear sample load. This kind of data is absolutely essential for application orientated technical product characterizations.

Pre-strain dependence of elastomer systems

Dynamic vibration test at pre-strains of 5 % to 100 %. Displayed is the line shape of the complex modulus of elasticity (E’, E’’) and damping tan delta in dependence on the pre-strain. In tension experiments, a dependence of the measuring results from the sample geometry (form factor) can be avoided by suitable sample selection (sample length should be markedly bigger than thickness and width). Our testing technique permits static pre-strains on samples of 100 % and more. Characteristic is the increase of the complex modulus of elasticity (E’, E’’) and a decrease of the damping with a rising pre-strain (dyn. strain amplitude: constant).