Our laboratories are fully equipped offering a wide range of services in rubber compounding, compound testing and characterization providing excellent value-added services.
We compound your material in our compounding lab with state-of-the-art equipment: Two internal mixers with different dimensions, two-roll mills and a vulcanization press are transforming your formulation into vulcanized rubber. At the end of the compounding a full set of mixing data is provided for detailed interpretation.
- Rheological Properties
The viscosity and scorch behaviour of your compounds are characterized with our Mooney viscometer. In addition, we measure the stress relaxation at the end of the test, indicating both elastic and viscous properties of the sample. As a result of the Mooney viscosity test the full data package plus measurement graphs is given.
Our die-rheometer is capable of describing the curing and processing characteristics of your rubber sample. The output is displayed graphically and recorded as data for a full analysis of the curing process.
With our rubber process analyser (RPA) as advanced test instrument the viscoelastic properties of polymers and rubber compounds are measured before, during and after curing. It is possible to test all material states along the part production process, i.e. from raw materials to cured compound. The complete output data in addition to the graphical record allows a detailed interpretation of the test results.
- Mechanical Testing
The hardness of vulcanized samples from your rubber compound can be as well measured as we characterize the modulus, strength and elongation behaviour of your rubber.
By applying different load cells not only the stress-strain behaviour of rubber can be studied in our laboratory but also sensitive samples can be characterized. And did you know that our tensile testers work with the same precision in the temperature range from -30 to 150 °C?
Fatigue properties of vulcanized rubber play an important role to ensure long-life performance. With our fatigue to failure tester we are able to test these properties enabling a parallel test of a number of samples at the same time.
- Abrasion Tests
Abrasion tests acc. to ISO 4649 / DIN 53516 are a well-established, simple and fast to characterize the abrasion properties of vulcanized samples from your compound. We perform this test on a daily basis.
However when it comes to abrasion of tires the Laboratory Abrasion Tester (LAT) is state-of-the-art of testing. With it´s wide range of testing capabilities we are bridging the gap between a one-point characterization of abrasion and expensive and time-consuming real-life tests of tires. The LAT is not only measuring both the abrasion resistance and the friction properties under a wide range of selectable conditions but is also capable of performing wet traction and rolling resistance tests of your compounds.
- Dynamic-mechanical Properties
Knowing the dynamical properties of your material is crucial for many applications.
With our DMA equipment we measure the viscoelastic properties of your rubber sample applying an oscillating strain and measuring the resulting stress. With the capability of performing the experiments over a wide temperature range and applying different loads and frequencies we generate important key values such as shear modulus, tan δ and static and dynamic displacements.
The rebound experiment is a simple, cost-efficient and easy method to describe the elastic behaviour of your rubber sample. Since it is well known and established over decades it still offers the opportunity to compare rubber compounds. In our lab different temperatures can be applied to achieve an indication for the viscoelastic behaviour.
- Thermal Analysis
When it comes to analyse a rubber sample the thermogravimetric analysis (TGA) is crucial. This simple, cost-effective and easy method allows you to identify e. g. the amount of fillers in your sample. With our thermogravimetric analyser we are able to identify weight losses of 0.1 microgram building a perfect basis for precise data.
Differential Scanning Calorimetry (DSC) is the state-of-the-art method to determine the glass transition temperature of your material. With our Netzsch DSC Polyma 214 we perform this calorimetric measurement offering you not only single data but also the full graphs.
- Filler Dispersion
Compound quality not necessarily requires long mixing times but efficient mixing. To determine the quality of this important step the filler dispersion is crucial. With our Alpha Technology Dispergrader the macro-dispersion is characterized by determination of the size, number and location of filler aggregates using the shadow casts of carbon black agglomerates present in a freshly cut surface.
- Chemical Analysis
In many cases the appropriate extraction technique needs to be applied to enable further material characterization. In our state-of-the-art chemical laboratories we are fully equipped to extract or modify your samples – being it raw materials, vulcanized samples or even used rubber parts!
For the specific detection and potential identification of substances in the presence of other chemicals our GC-MS and LC-MS spectroscopes as well as our HPLC apparatus are the devices of choice.
- Optical Material Characterization
Characterizing the chemical composition of rubber compounds, final parts or raw materials is sometimes a very powerful way to determine the interaction of compound ingredients or the influence of process steps on the chemistry of your compound.
With our well-equipped optical laboratory we are able to use optical microscopes, IR spectroscopy and NMR to identify the chemical composition.
And even more analytical equipment is available throughout the University e. g. Atomic Force Microscopes, X-ray fluorescence spectroscopy, ICP-AES, etc.