Head of Department: Dr. Konrad Schneider
The microscopic structure of polymeric materials has a significant impact on their macroscopic properties. A better understanding of the structure-properties relations offers the possibility of a dedicated materials design and optimisation, where in multicomponent materials also interfaces and morphology play a major role.
In particular mechanical properties are important in most polymer applications, which are in the focus of the work. Structural investigations are performed at different levels from a nanometer scale to macroscopic dimensions, and a direct correlation between structure, conformation, orientation, morphology, phase compositions, homogeneity, dispersion etc. and important properties like toughness, strength, adhesion is tried to be established.
During Online-structure characterisation by x-rays it is possible to follow directly temperature dependent structural changes during deformation and fracture. Due to the necessary beam intensity and time resolution the investigations were performed mostly with synchrotron radiation (ESRF, Hasylab). Using fibre symmetry of the specimen segment length distributions were estimated from the pattern.