Mechanical hole burning spectroscopy: evidence for heterogeneous dynamics in polymer systems.

摘要: We have developed a mechanical spectral hole burning (MSHB) scheme that is analogous to nonresonant dielectric (DSHB). DSHB experiments been performed close the glass temperature and interpreted in terms of dynamic heterogeneity. Here we find holes are burned far above terminal regimes for branched polymer melt solution. The results suggest MSHB potentially powerful tool with which examine dynamics complex fluids.