Analytics and material testing

The group “Analytics and Material Testing” conducts research projects and helps industrial partners, experts and cooperation partners characterize or assess raw materials, coating materials, coatings and plastics. Our projects and contracts are generally concerned with national and international industrial issues.


Key areas of interest:

  • Physical-chemical analysis programs to characterize/identify materials and determine changes in materials due to temperature, time or stress
  • Failure analyses, clarification of damage mechanisms

Selected analysis methods using infrared spectroscopy, Dynamic Mechanical Analysis (DMA), Differential Scanning Calorimetry (DSC) and Thermogravimetry (TGA) are accredited in compliance with DIN EN ISO/IEC 17025. We also implement interface analysis methods, gas chromatography coupled with mass spectrometry (GC/MS) and characterize liquids and paints with the aid of rheological tests.

 

We conduct analyses and tests on flaws in coatings and substrates (materials). Some examples are listed below:

Determination of formaldehyde emissions from coatings

To determine formaldehyde emission levels from materials, such as coated sheet metal, we apply a modified version of the well-known bottle method (determination of emissions from coatings in relation to surface area in mg/m²)


Identification of particles from pumps/filters (material analysis)

To pinpoint the source of damage, small black particles were separated from a pump/filter and investigated by infrared spectroscopy to determine material type. By comparing them with reference material, a possible source could be identified.


Testing for the migration of substances impairing paint-wetting properties from a seal

Sealing materials containing plastic may also contain substances that impair the wetting properties of paints. Sometimes, these substances only migrate from materials at high temperatures or after longer periods of use. Example: silicon seal.


Analysis of a film on a powder coating

When a black powder coating was cleaned with benzine, a white film formed on the surface. This was identified as wax components in the powder formula.


Interface test: identification of components on a substrate impairing adhesion strength

The coating on side rubbing strips was found to be contaminated. Soluble, non-volatile organic substances, including fatty acid esters and soluble binding agents, were found in the interface plastic substrate / coating.


Production control of acrylic polymers

A dried dispersion was examined to find out if selected acrylic monomers were polymerized in the mixture or if they mixed individually to form a dispersion. By determining the glass transition temperature(s), it was possible to ascertain how this dispersion was formed.


Research projects:

  • UV curing guidelines for organic coatings: clarification of generally-applicable relationships between curing kinetics and material/performance characteristics
  • Simulation of flame-treatment processes on plastics
 

Practical examples

Chemical-physical analysis programs to characterize/identify materials and assess specific material properties

 

Approach to analyzing defects

Recognizing and avoiding paint damage: We prepare an individual offer with selection of suitable analysis methods and process analysis. Production-accompanying quality control after implementation.