| Issue |
Europhys. Lett.
Volume 44, Number 3, November I 1998
|
|
|---|---|---|
| Page(s) | 315 - 320 | |
| Section | Condensed matter: structure, thermal and mechanical properties | |
| DOI | https://doi.org/10.1209/epl/i1998-00476-x | |
| Published online | 01 September 2002 | |
Dynamical processes in a superpressed glass-forming liquid studied by dielectric spectroscopy
Institute of Physics, Silesian University - ul. Uniwersytecka 4, 40-007 Katowice, Poland
Received:
16
March
1998
Accepted:
14
September
1998
Dielectric measurements of poly(bisphenol
A-co-epichlorohydrin), glicydyl end-capped have been carried out at
pressures from 0.1 MPa to 350 MPa. Two different types of relaxation
phenomena, namely primary (α) and conductivity relaxation have
been studied. It was found that conductivity relaxation (reflecting
translational diffusion of mobile ions) is decoupled from
α-relaxation. Pressure dependences of the characteristic
relaxation time for both processes obey the following law:
![$\tau=\tau_0\exp[C_p P/P_0-P]$](/articles/epl/abs/1998/21/44308/44308_tex_eq1.png)
.
PACS: 64.70.Pf – Glass transitions / 77.22.Gm – Dielectric loss and relaxation / 65.50.+m – Thermodynamic properties and entropy
© EDP Sciences, 1998
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