High-pressure viscoelastic properties and equation of state of liquids derived from Brillouin data

Oliver, W. F.; Herbst, C. A.; Lindsay, Stuart; Wolf, George H.

doi:10.1103/physrevlett.67.2795

Cited by 37 publications

(18 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…High-pressure Brillouin studies on 1:1 pentane/isopentane up to 12 GPa, which is used as a hydrostatic medium in high- pressure experiments, shows a glass transition around 7 GPa. 37 This suggests that n-pentane could develop disorder at higher pressure. Figure 7 shows the schematic representation of the n-pentane at pressures (a) below and b) above the transition temperature of 12.3 GPa.…”

Section: Discussionmentioning

confidence: 98%

Pressure-Induced Structural Transition in n-Pentane: A Raman Study

Ganesan

Narayana

2007

J. Phys. Chem. B

View full text Add to dashboard Cite

Pressure-induced Raman spectroscopy studies on n-pentane have been carried out up to 17 GPa at ambient temperature. n-Pentane undergoes a liquid-solid transition around 3.0 GPa and a solid-solid transition around 12.3 GPa. The intensity ratio of the Raman modes related to all-trans conformation (1130 cm-1 and 2850 cm-1) to that of gauche conformation (1090 cm-1 and 2922 cm-1) suggests an increase in the gauche population conformers above 12.3 GPa. This is accompanied with broadening of Raman modes above 12.3 GPa. The high-pressure phase of n-pentane above 12.3 GPa is a disordered phase where the carbon chains are kinked. The pressure-induced order-disorder phase transition is different from the behavior of higher hydrocarbon like n-heptane.

show abstract

Section: Discussionmentioning

confidence: 98%

Pressure-Induced Structural Transition in n-Pentane: A Raman Study

Ganesan

Narayana

2007

J. Phys. Chem. B

View full text Add to dashboard Cite

show abstract

“…In most cases the glass transition is studied by measuring the temperature dependence of viscosity or relaxation time of the supercooled liquid. Only in a few cases the pressure dependence of these parameters was measured by light scattering [1][2][3][4], dielectric relaxation [5][6][7][8], viscosity [9][10][11], specific heat [12,13], and quasielastic neutron scattering [14]. These studies were carried out both in low molecular weight (e.g., o-Terphenyl, glycerol, dibutyl phthalate, isopropylbenzene) and polymers [e.g., polyisoprene, poly(propylene glycol)].…”

mentioning

confidence: 99%

Temperature and Pressure Scaling of theαRelaxation Process in Fragile Glass Formers: A Dynamic Light Scattering Study

2000

View full text Add to dashboard Cite

The dynamics of two fragile glass forming liquids was studied as a function of temperature and pressure using dynamic light scattering. On the basis of measured data we evaluated the pressure and temperature scaling of the alpha relaxation. All the isotherms can be superimposed and form a master curve when the reduced relaxation times are plotted versus reduced pressure. The Kohlrausch-Williams-Watts stretching parameter beta(KWW) is increasing with increasing temperature and decreasing pressure and plotted versus log follows a master curve at all temperatures and pressures studied.

show abstract

“…A complementary way to vitrify a liquid is by applying pressure. [8][9][10] In this way no kinetic energy is withdrawn from the system, but the energy barriers that connect different regions in configuration space are increased in height, and their spacing is decreased due to compression. For pressures higher than the glass transition pressure, the system is trapped between barriers.…”

Section: Introductionmentioning

confidence: 99%

Competition between vitrification and crystallization of methanol at high pressure

Brugmans

Vos

1995

The Journal of Chemical Physics

View full text Add to dashboard Cite

Competition between vitrification and crystallization of methanol at high pressure Brugmans, M.J.P.; Vos, W.L. General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. We have studied methanol at high pressure up to 33 GPa at room temperature with x-ray diffraction, optical ͑polarization͒ microscopy, Raman spectroscopy, and detection of hydrostaticity. A competition between crystallization and vitrification is observed when methanol is superpressed beyond the freezing pressure of 3.5 GPa: between 5.0 and 10.5 GPa crystals can nucleate, but if this region is surpassed quickly enough ͑within a few seconds͒, methanol remains amorphous. For the first time the nucleation rate and the crystal growth velocity have been studied as a function of pressure. These kinetic properties can be described by classical nucleation theory in agreement with, respectively, Turnbull-Fisher and Wilson-Frenkel type behavior using one and the same activated hard-sphere diffusion coefficient. The experimental nucleation rate and the crystal growth velocity are both effectively reduced to zero above 10.5 GPa, because the diffusion is suppressed. At these pressures methanol is compressed into a glass.

show abstract

High-pressure viscoelastic properties and equation of state of liquids derived from Brillouin data

Cited by 37 publications

References 25 publications

Pressure-Induced Structural Transition in n-Pentane: A Raman Study

Pressure-Induced Structural Transition in n-Pentane: A Raman Study

Temperature and Pressure Scaling of theαRelaxation Process in Fragile Glass Formers: A Dynamic Light Scattering Study

Competition between vitrification and crystallization of methanol at high pressure

Contact Info

Product

Resources

About