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Published on: June 6, 2017
Temperature and volume effects on the change of dynamics in propylene carbonate
S Pawlus1, R Casalini, C M Roland
1Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland.
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.
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