Nanostructure and low-frequency vibrations in plasticized poly(methyl methacrylate)
LPCML, UMR-CNRS 5620, Université Lyon 1 - 69622 Villeurbanne Cédex, France
2 GEMPPM, UMR-CNRS 5510, INSA Lyon - 69621 Villeurbanne Cédex, France
3 LPM, UMR-CNRS 7556, Ecole des Mines de Nancy - 54041 Nancy Cédex, France
4 Ioffe Physico-technical Institute, Russian Academy of Sciences, St. Petersburg 194021, Russia
The small-angle X-ray scattering (SAXS) and the low-frequency Raman scattering (LFRS) of pure and plasticized poly(methyl methacrylate) (PMMA) samples are compared. A correlation peak in SAXS appears in plasticized PMMA at about , which does not exist in pure PMMA. An increase of the boson peak intensity with the amount of plasticizer is observed. These observations allow to sustain the relation between the boson peak and inhomogeneous nanostructure in glasses.
PACS: 63.50.+x – Vibrational states in disordered systems / 61.10.Eq – X-ray scattering (including small-angle scattering) / 78.30.Ly – Disordered solids
© EDP Sciences, 1998