Thermal methods such as DSC, DMA and TGA are particularly suitable for the characterization of polymers. Among other things, glass transition temperatures, degree of crystallization, purity and Young's modulus can be measured. At the institute we have the appropriate equipment. Furthermore, molar mass distributions can be determined by means of GPC. In addition to thermal analysis techniques, other methods are available. By means of rheological investigations, the storage or loss modulus can be measured. These parameters are important characteristics of hydrogels. Dynamic light scattering can be used to determine the hydrodynamic radius and zeta potential. Both are values that can be used to observe successful modification of nanoparticles. To characterize modified surfaces, wettability plays an important role. The determination of the contact angle is the method of choice for this purpose.