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      https://www.ias.ac.in/article/fulltext/pram/063/01/0033-0040

    • Keywords

       

      Dynamics in glass-forming polymers; α-relaxation; chain dynamics; quasi-elastic neutron scattering

    • Abstract

       

      By means of neutron spin echo (NSE) we have explored the dynamics of poly(vinyl ethylene) on length scales covering Rouse dynamics and below. The results establish the simultaneous existence of a generic sublinear diffusion regime which underlies the α-process in addition to the Rouse process. Both regimes are separated by a well-defined dynamic crossover. From that the size of the Gaussian blobs making up the Rouse model is determined directly. The glassy dynamics may thus be identified with subdiffusive motions occurring within these Gaussian blobs.

    • Author Affiliations

       

      A Arbe1 J Colmenero1 2 3 D Richter4 M Monkenbusch4 L Willner4 B Farago5

      1. Unidad Física de Materiales CSIC-UPV/EHU, Apartado 1072, San Sebastián - 20080, Spain
      2. Departamento de Física de Materiales UPV/EHU, Apartado 1072, San Sebastián - 20080, Spain
      3. Donostia International Physics Center, Apartado 1072, San Sebastián - 20080, Spain
      4. Institut für Festkörperforschung, Forschungszentrum Jülich GmbH, Jülich - D-52425, Germany
      5. Institut Laue-Langevin, BP 156, Grenoble Cedex 9 - 38042, France
    • Dates

       
  • Pramana – Journal of Physics | News

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