Dielectric study of supercooled triphenylphosphite and butyronitrile: Comparison with a mesoscopic model

✍ Scribed by Bernd Schiener; Alois Loidl; Ralph V. Chamberlin; Roland Böhmer

• Book ID: 104303819
• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 575 KB
• Volume: 69
• Category: Article
• ISSN: 0167-7322
• DOI: 10.1016/s0167-7322(96)90018-5

✦ Synopsis

Dielectric relaxation has been studied in the supercooled liquids triphenylphosphite (TPP) and butyrontrile (BN). BN is relatively strong according to Angell's classification and can be characterized by a fragility index m = 47. TPP, on the other hand, appears to be the most fragile non-polymeric liquid studied so far (m = 160). The dielectric response of the two glass-fanners exhibits different degrees of non-exponentiality which is analyzed in terms of a mesoscopic model of dynamically correlated domains. The relation of this model to the strong versus f?agile liquid classification scheme is discussed.