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Volumn 7, Issue 4, 1997, Pages 581-598

Small characteristic length at the glass transition cooperativity onset

Author keywords

[No Author keywords available]

Indexed keywords

DIELECTRIC RELAXATION; REACTION KINETICS; SPECIFIC HEAT OF LIQUIDS; SPECTROSCOPY;

EID: 0031125834     PISSN: 11554312     EISSN: None     Source Type: Journal    
DOI: 10.1051/jp1:1997177     Document Type: Article
Times cited : (21)

References (34)
  • 3
    • 0010621521 scopus 로고
    • Akademie-Verlag, Berlin
    • Donth E., Glasübergang (Akademie-Verlag, Berlin, 1981).
    • (1981) Glasübergang
    • Donth, E.1
  • 13
    • 0030289867 scopus 로고    scopus 로고
    • At present, the contrast that can be detected by scattering experiments is of order several percent (ef. e.g. the neutron diffraction study in propylene glycol by Leheny R.L., Menon N., Nagel S.R. et al, J. Chem. Phys. 105 (1996) 7783-7794). Typical values of ζα (a few nanometers [10]) would correspond to a slight variation of the scattering factor S(q) in the crossover from the fluctuation plateau to the first peak in S(q). At present negative evidence does not allow to conclude that there is no characteristic length for glass transition, for the following reasons. The characteristic length is a dynamic or kinetic property of glass transition cooperativity which, in principle, needs not to be connected with a density correlation at all
    • (1996) J. Chem. Phys. , vol.105 , pp. 7783-7794
    • Leheny, R.L.1    Menon, N.2    Nagel, S.R.3
  • 14
    • 21344477772 scopus 로고
    • (cf. e.g. Sappelt D. and Jäckle J., J. Phys. A: Math. Gen. 26 (1993) 7325). If the mobility variation is, however, coupled to local densities, the density effects are expected to be very small, since, as well known, very small changes of free volume have large effects on mobility. Moreover, the theoretical approach used here can also be based on a "free entropy" [21]. This would give an entropy (or structure) pattern that does not inevitably imply a density pattern. Moreover, a part of local structure or configuration fluctuations can be lost by the natural averaging included in scattering experiments.
    • (1993) J. Phys. A: Math. Gen. , vol.26 , pp. 7325
    • Sappelt, D.1    Jäckle, J.2
  • 22
    • 0006210543 scopus 로고
    • Relaxation and Thermodynamics in Polymers
    • Akademie. Verlag, Berlin
    • Donth E., Relaxation and Thermodynamics in Polymers. Glass Transition (Akademie. Verlag, Berlin, 1992).
    • (1992) Glass Transition
    • Donth, E.1
  • 28
    • 33750075718 scopus 로고    scopus 로고
    • Thesis, Universität Halle
    • Korus J., Thesis, Universität Halle, 1997.
    • (1997)
    • Korus, J.1
  • 33
    • 33750086617 scopus 로고    scopus 로고
    • note
    • α time scale (Fig. 3) we have many space points for a quasi-continuous description of the cooperative rearrangements in a CRR. This allows the extension of the description to very small parts of a CRR and to very small CRR's itself, e.g. in the onset region.
  • 34
    • 85085780922 scopus 로고    scopus 로고
    • note
    • min could not introduce new elements not contained in the minimal variant.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.