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7 papers · 1 filter
An equation for the description of volume and temperature dependences of the dynamics of supercooled liquids and polymer melts
R. Casalini, C. M. Roland
A recently proposed expression to describe the temperature and volume dependences of the structural (or alpha) relaxation time is discussed. This equation satisfies the scaling law…
Effect of entropy on the dynamics of supercooled liquids: New results from high pressure data
R. Casalini, C. M. Roland
We show that for arbitrary thermodynamic conditions, master curves of the entropy are obtained by expressing S(T,V) as a function of TV^g_G, where T is temperature, V specific volu…
Invariance of the Local Segmental Relaxation Dispersion in Polycyclohexylmethacrylate / Poly-alpha-Methylstyrene Blends
CM Roland, R Casalini
Dielectric spectroscopy was carried out on polycyclohexylmethacrylate (PCHMA) and its blend with poly-alpha-methylstyrene (PaMS) as a function of temperature and pressure. When mea…
Thermodynamic Scaling of the Viscosity of Van Der Waals, H-Bonded, and Ionic Liquids
CM Roland, S Bair, R Casalini
Viscosities and their temperature, T, and volume, V, dependences are reported for 7 molecular liquids and polymers. In combination with literature viscosity data for 5 other liquid…
Thermodynamic interpretation of the scaling of the dynamics of supercooled liquids
R. Casalini, U. Mohanty, C. M. Roland
The recently discovered scaling law for the relaxation times, tau=f(T,V^g), where T is temperature and V the specific volume, is derived by a revision of the entropy model of the g…
Hanbury Brown-Twiss Interferometry for Fractional and Integer Mott Phases
Ana Maria Rey, Indubala I. Satija, Charles W. Clark
Hanbury-Brown-Twiss interferometry (HBTI) is used to study integer and fractionally filled Mott Insulator (MI) phases in period-2 optical superlattices. In contrast to the quasimom…