title: Temperature and volume effects on the change of dynamics in propylene carbonate.
abstract: Dielectric relaxation and PVT measurements were carried out on propylene carbonate. From these, we show that thermal energy exerts a stronger influence than volume on the temperature dependence of the dynamic properties. Data obtained at all temperatures and pressures superimpose, when expressed as a function of T-1 V-3.7 . The scaling exponent is consistent with more thermally governed dynamics, and can be interpreted as a reflection of the soft nature of the potential. The change of dynamics observed in the conductivity and relaxation data transpires at a fixed value of either quantity, independent of temperature and pressure.
authors.affiliation: Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland.
authors.forename: S
authors.initials: S
authors.lastname: Pawlus
authors.forename: R
authors.initials: R
authors.lastname: Casalini
authors.forename: C M
authors.initials: CM
authors.lastname: Roland
authors.forename: M
authors.initials: M
authors.lastname: Paluch
authors.forename: S J
authors.initials: SJ
authors.lastname: Rzoska
authors.forename: J
authors.initials: J
authors.lastname: Ziolo