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Vogel-Fulcher-like relation

The temperature dependence of a structural relaxation process is in some cases of the Arrhenius type like in the case in 1,5-pentanediol. Very often we observe, however, a much stronger dependence especially at low temperatures. This has been succes-fully described by the Vogel-Fulcher-Tamann (VFT) equation involving an additional parameter, the T temperature, which is related to the glass temperature T °... [Pg.230]

The motion of ions (i.e. conductivity) in polymer electrolytes appears to occur by a liquid-like mechanism in which the movement of ions through the polymer matrix is assisted by the large amplitude segmental motion of the polymer backbone. Ionic conductivity primarily occurs in the amorphous regions of the polymer [4,5]. The temperature dependence of the conductivity of polymer electrolytes is best related by the Vogel-Tamman-Fulcher (VTF) equation... [Pg.77]

See other pages where Vogel-Fulcher-like relation is mentioned: [Pg.1249]    [Pg.1249]    [Pg.52]    [Pg.101]    [Pg.90]    [Pg.90]    [Pg.79]    [Pg.284]    [Pg.1172]    [Pg.190]    [Pg.155]   


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