Bond-induced ergodicity breakdown in reactive mixtures (Articolo in rivista)

Type
Label
  • Bond-induced ergodicity breakdown in reactive mixtures (Articolo in rivista) (literal)
Anno
  • 2006-01-01T00:00:00+01:00 (literal)
Alternative label
  • Corezzi, S; Comez, L; Monaco, G; Verbeni, R; Fioretto, D (2006)
    Bond-induced ergodicity breakdown in reactive mixtures
    in Physical review letters (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Corezzi, S; Comez, L; Monaco, G; Verbeni, R; Fioretto, D (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 96 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Univ Roma La Sapienza, INFM, CRS, SOFT, I-00185 Rome, Italy; Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy; Univ Perugia, Dipartimento Fis, I-06123 Perugia, Italy; European Synchrotron Radiat Facil, F-38043 Grenoble, France (literal)
Titolo
  • Bond-induced ergodicity breakdown in reactive mixtures (literal)
Abstract
  • We have studied by inelastic x-ray scattering, at wave vectors 1 nm(-1)<= q <= 15 nm(-1), the high-frequency dynamics of epoxy-amine mixtures as the monomers irreversibly polymerize. We find that chemical bonding, while inducing molecular ordering on a mesoscopic length scale, also efficiently realizes the mechanism of dynamical arrest described by the mode-coupling theory, as manifested by a cusp singularity in the behavior of the nonergodicity factor as a function of the number of chemical bonds. These results confront positively the mode-coupling theory with a new control parameter. (literal)
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