Abstract
The design of specific dynamic filters on the basis of different multi-time correlation functions as measured by multidimensional solid-state nuclear magnetic resonance spectroscopy is discussed. Supplementary to previous applications of this type of experiment, not only slow dynamics but also fast relaxation processes are selected and their dynamic properties are analysed. The experiment is applied to the non-exponential structural relaxation of poly(vinyl acetate). Dynamic heterogeneities are shown to dominate the relaxation. Equilibration of both fast and slow subensembles is observed on the same time scale.
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