M Paluch et al 2002 J. Phys.: Condens. Matter 14 9489 doi:10.1088/0953-8984/14/41/306
M Paluch1,2, T Psurek2 and C M Roland1
Show affiliationsIonic conductivity data and structural relaxation times for poly(phenyl glycidyl ether)-co-formaldehyde (PPGE) are compared for the supercooled liquid under a wide range of temperatures and pressures. Conformance to the fractional Debye–Stokes–Einstein (fDSE) relation was observed under all conditions. The fDSE exponent, = 0.81, provides an estimate of the relative magnitude of the activation volumes for conductivity and dielectric relaxation. The smaller activation volume for the former suggests less free volume is necessary to accommodate ion diffusion in the PPGE than that required for dielectric relaxation. We also fit the combined temperature and pressure dependences of both the conductivity and relaxation times to the Avramov equation.
Issue 41 (21 October 2002)
Received 17 July 2002, in final form 19 August 2002
Published 4 October 2002
M Paluch et al 2002 J. Phys.: Condens. Matter 14 9489
P D Jarman and K J Taylor 1964 Br. J. Appl. Phys. 15 321
Beau A Standish et al 2010 Phys. Med. Biol. 55 615
P Mansfield and P K Grannell 1973 J. Phys. C: Solid State Phys. 6 L422
S Westwood et al 2009 Metrologia 46 08019
Kyung Joong Kim 2009 Metrologia 46 08006
Joële Viallon et al 2006 Metrologia 43 08010
Jascindra Ravi et al 2010 Metrologia 47 08022
Robert B Jackson et al 2008 Environ. Res. Lett. 3 044006
Sarah R Cooley and Scott C Doney 2009 Environ. Res. Lett. 4 024007