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Incoherent quasi-elastic neutron scattering (IQENS) by ethylene glycol in confined space

Author

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  • Crupi, V.
  • Majolino, D.
  • Migliardo, P.
  • Venuti, V.

Abstract

With the aim of studying the confinement influence on the molecular mobility of H-bonded systems, high-resolution quasi-elastic neutron scattering data were obtained for ethylene glycol [EG: H(O–CH2–CH2)OH] in the bulk state at T=40°C and confined into 25Å pores of a sol–gel porous glass, at T=−35°C and 40°C. The experimental data are discussed in terms of the α-relaxation dynamics predicted by mode-coupling theory for supercooled liquids. We verified that an Havriliak–Negami profile, that is verified when a distribution of relaxation times is present, represents a good description for the measured QENS translational spectral line shape.

Suggested Citation

  • Crupi, V. & Majolino, D. & Migliardo, P. & Venuti, V., 2002. "Incoherent quasi-elastic neutron scattering (IQENS) by ethylene glycol in confined space," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 304(1), pages 249-252.
    • Handle: RePEc:eee:phsmap:v:304:y:2002:i:1:p:249-252
    DOI: 10.1016/S0378-4371(01)00531-3
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    Keywords

    Polymers; Quasielastic neutron scattering;

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