Low-frequency Raman scattering and structure of amorphous polymers: Stretching effect

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  • T. Achibat
    Laboratoire de Physicochimie des Matériaux Luminescents, URA CNRS 442, Université Lyon I, Campus La Doua, 69622 Villeurbanne, France
  • A. Boukenter
    Laboratoire de Physicochimie des Matériaux Luminescents, URA CNRS 442, Université Lyon I, Campus La Doua, 69622 Villeurbanne, France
  • E. Duval
    Laboratoire de Physicochimie des Matériaux Luminescents, URA CNRS 442, Université Lyon I, Campus La Doua, 69622 Villeurbanne, France
  • G. Lorentz
    CRC, Rhône-Poulenc, 85 av des Frères Perret, BP 62 69192 Saint Fons Cedex, France
  • S. Etienne
    GEMPPM, URA-CNRS 341, INSA, 69621 Villeurbanne, France

抄録

<jats:p>Low-frequency Raman scattering of amorphous polymers [polyethyleneterephthalate (PET) and polymethylmethacrylate] is investigated. The low-frequency Raman band called ‘‘Boson peak’’ is interpreted in terms of a noncontinuous structure, similar to that of inorganic glasses, i.e., solid amorphous polymers are composed of 50 Å blobs. These are related blobs to transient entanglements in the polymer melt. Modifications induced by stretching are described for a PET film. The nature of the blob structure is discussed.</jats:p>

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