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

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

Physica A: Statistical Mechanics and its Applications, 2002, vol. 304, issue 1, 249-252

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.

Keywords: Polymers; Quasielastic neutron scattering (search for similar items in EconPapers)
Date: 2002
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:304:y:2002:i:1:p:249-252

DOI: 10.1016/S0378-4371(01)00531-3

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