After a brief review on the Raman scattering investigations of dehydrated gels, the effect of a structural inhomogeneity on a low energy excitation is discussed. A diffusive central mode observed in a wet polyacrylamide gel becomes narrow with the progress of dehydration and, at last, a low-lying peak appears around 80 cm- 1. The peak can be observed above the glass transition temperature indicating a relation to the cross-links of the polymer network. The estimation of such a relation is supported by a low-lying spectral change caused by a structural inhomogeneity.
|Number of pages||4|
|Publication status||Published - 2007|
|Event||8th Russia/CIS/Baltic/Japan Symposium on Ferroelectricity, RCBJSF-8 - Tsukuba, Japan|
Duration: May 15 2006 → May 19 2006
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics