Brillouin-spectroscopy experiments on polymorphic ethanol

Rafael J. Jimenez-Rioboo (1) , Miguel Angel Ramos (2)

1 ICMM - Instituto de Ciencia de Materiales de Madrid
2 FMC - Departamento de Fisica de la Materia Condensada [Madrid]

We report Brillouin-spectroscopy experiments conducted on ethanol, in the liquid and glass states, as well as in the stable crystal, plastic crystal and orientationally-disordered crystal (“glassy crystal”) phases. Both the canonical supercooled liquid -- glass transition and the dynamical plastic crystal -- glassy crystal transition are observed as a kink in the sound velocity at 96 K. We have also studied the influence of small amounts of water on the crystallization kinetics for the stable and the plastic crystal phases, which are slowed down in favour of glass formation even with less than 0.5% water impurity.

Mots clés: Physical Sciences

Rafael J. Jimenez-Rioboo, Miguel Angel Ramos. Brillouin-spectroscopy experiments on polymorphic ethanol. Philosophical Magazine, 2007, 87 (3-5), pp.657-663. ⟨10.1080/14786430600909048⟩. ⟨hal-00513744⟩