Field-cycling NMR relaxometry of viscous liquids and polymers

► NMR relaxometry compared with DQ NMR, dielectric spectroscopy and light scattering. ► Applying susceptibility representation and frequency-temperature superposition. ► Liquids: Intra- and intermolecular relaxation give rotational and translational correlation times. ► Polymers: Dipolar correlation functions probed over six decades in amplitude and eight decades in time.