- NMR Spectroscopy
- Thermal Analysis
Contact: Dr. S. Boye
We apply Thermal Analysis in order to study physical and chemical properties of different types of molecules such as polymers, anorganic compounds, etc.
Thermogravimetric investigations (TGA) of polymers are performed to study thermal and thermo-oxidative degradation.
Furthermore, volatile compounds can be analyzed by coupled FTIR spectroscopy and GC-MS.
Dynamic differential calorimetry (DSC) is applied for the investigation of melting, crystallization and glass transition behavior as well as solid-solid phase transitions and cross-linking reactions in polymers.
- Chromatography, Fractionation and Light Scattering
Chromatography, Fractionation and Light Scattering
Contact: Prof. A. Lederer
High and ambient temperature size exclusion chromatography (SEC) is performed for determination of molar mass distributions in organic and aqueous media.
Light scattering and viscosity detection, in batch or on-line for absolute enable the determination of:
- molar masses,
- and thermodynamic parameters of macromolecules, nanoparticles and conjugates.
Asymmetrical flow field flow fractionation (AF4) and thermal field flow fractionation (thFFF) is applied for the separation and characterization of polymers and macromolecules in the range of 101 – 106 kg/mol.
Classical, head-space and pyrolysis gas chromatography (GC) coupled with mass spectrometry is applied for qualitative determination of volatile compounds.
- Vibrational Spectroscopy
- FTIR and Raman spectroscopy for qualitative and quantitative polymer analysis
- FTIR and Raman microscopy for characterization of additives, contaminations and inclusions as well as analysis of heterogenic materials
- Confocal Raman microscopy for analysis of polymers, copolymers, materials, depth profiles, 3D analyses, surfaces structures and phase separations
- Particle analysis in the range from 1 µm up to cm
- FTIR and Raman imaging
- In-situ and temperature dependent FTIR and Raman microscopy
- Surface enhanced Raman spectroscopy (SERS)
- IR measurements at nanoscale (AFM-IR)
- Spectroscopic Ellipsometry
Ellipsometry in the visible light range is used to determine nm-thin film thicknesses and optical properties in the dry state and in aqueous solutions.
This can be used to analyse the swelling of polymer films, the adsorption of biomolecules, temperature-dependent phase transitions and anisotropic semiconducting thin films for OPV and OLED.
Mueller matrix ellipsometry and microscopy is applied to evaluate biaxial optical anisotropy, e.g. in stretched elastomers or hybrid nanostructures.
- Elemental Analysis
- Matrix-assisted laser desorption ionization mass spectrometry (MALDI-ToF-MS)
Matrix-assisted laser desorption ionization mass spectrometry (MALDI-ToF-MS)
Contact: Prof. A. Lederer
- Determination of molar masses and their distributions, characterization of cyclic and linear structures and monomer units with special start and end groups
- Analysis of reaction mechanisms of synthetic polymers and bio-macromolecules
- Coupling of MALDI with chromatographic techniques for the characterization of molecular and chemical heterogeneities in homo and block copolymers