Viscoelastic properties of liquid pentachlorobiphenyl under pressure using depolarized light scattering

1983 ◽  
Vol 61 (9) ◽  
pp. 1291-1296 ◽  
Author(s):  
P. Bezot ◽  
C. Hesse-Bezot ◽  
Ph. Pruzan
Keyword(s):  
High Pressure ◽  
Light Scattering ◽  
Shear Modulus ◽  
Viscoelastic Properties ◽  
Pressure Range ◽  
Glassy State ◽  
Molecular Liquids ◽  
Large Pressure ◽  
Scattering Spectra ◽  
Depolarized Light Scattering

A study of the depolarized light scattering spectra of high pressure supercooled pentachlorobiphenyl is presented. From the analysis of the propagative shear doublet, the infinite shear modulus Gx is measured over a large pressure range, at various temperatures, up to a pressure where the liquid is in a glassy state. Gx(P) is found to vary linearly at each temperature. From values of Gx (P = 0.1 MPa) together with those obtained in a previous paper at P = 0.1 MPa as a function of T, it is concluded that Gx(T) is linear over 70 °C, contrary to what is generally obtained in most of the supercooled molecular liquids.

Propagating Shear Waves in Liquid Pentachlorobiphenyl

1983 ◽  
Vol 22 ◽  
Author(s):  
P. Bezot ◽  
C. Hesse-Bezot ◽  
P. Pruzan
Keyword(s):  
Light Scattering ◽  
Shear Modulus ◽  
Atmospheric Pressure ◽  
Pressure Range ◽  
Glassy State ◽  
Shear Waves ◽  
Measured Temperature ◽  
Scattering Study ◽  
Propagating Shear ◽  
Depolarized Light Scattering

ABSTRACTA depolarized light scattering study of pressure supercooled Pentachlorobiphenyl is presented. Fram the analysis of propa gative depolarized shear doublets, the shear modulus G∞ at infinite frequency is measured for various temperatures. The pressure range is from atmospheric pressure to pressures whem the liquid is in a glassy state : G∞ (p) is found to vary linearly at each measured temperature.

scholarly journals Mechanical properties and band structure of CdSe and CdTe nanostructures at high pressure - a first-principles study

2019 ◽  
Vol 13 (2) ◽  
pp. 124-131 ◽  
Author(s):  
Natarajan Kishore ◽  
Veerappan Nagarajan ◽  
Ramanathan Chandiramouli
Keyword(s):  
Mechanical Properties ◽  
High Pressure ◽  
Shear Modulus ◽  
Band Structure ◽  
First Principles ◽  
Pressure Range ◽  
Uniaxial Pressure ◽  
First Principles Calculations ◽  
Zinc Blende ◽  
Cauchy Pressure

First-principles calculations for CdSe and CdTe nanostructures were carried out to study their mechanical properties and band structure under the uniaxial pressure range of 0 to 50GPa. It was presumed that the CdSe and CdTe nanostructures exist in the zinc-blende phase under high pressure. The mechanical properties, such as elastic constants, bulk modulus, shear modulus and Young?s modulus, were explored. Furthermore, Cauchy pressure, Poisson?s ratio and Pugh?s criterion were studied under high pressure for both CdSe and CdTe nanostructures, and the results show that they exhibit ductile property. The band structure studies of CdSe and CdTe were also investigated. The findings show that the mechanical properties and the band structures of CdSe and CdTe can be tailored with high pressure.

scholarly journals Observation of Chain Dynamics in Depolarized Light Scattering Spectra of Polymers

2004 ◽  
Vol 37 (24) ◽  
pp. 9273-9278 ◽  
Author(s):  
Yifu Ding ◽  
V. N. Novikov ◽  
A. P. Sokolov ◽  
R. Casalini ◽  
C. M. Roland
Keyword(s):  
Light Scattering ◽  
Chain Dynamics ◽  
Scattering Spectra ◽  
Depolarized Light Scattering

scholarly journals Collision-Induced Light Scattering in Liquids and the Binary Collision Model

1973 ◽  
Vol 51 (19) ◽  
pp. 2025-2031 ◽  
Author(s):  
J. H. K. Ho ◽  
G. C. Tabisz
Keyword(s):  
Molecular Dynamics ◽  
Light Scattering ◽  
Theoretical Estimate ◽  
Binary Collision ◽  
Reliable Information ◽  
Molecular Liquids ◽  
Collision Model ◽  
Scattering Spectrum ◽  
Light Scattering Spectrum ◽  
Depolarized Light Scattering

The collision-induced Rayleigh wing in the depolarized light scattering spectrum of five molecular liquids has been studied in order to try to assess the validity of the isolated binary collision model. The intensity profiles have been analyzed in terms of the expressions derived by Bucaro and Litovitz, [Formula: see text], and by Shin, [Formula: see text]. It is concluded that before a positive distinction can be made between models or before reliable information on molecular dynamics may be extracted from the spectrum, a good theoretical estimate of the form of the induced polarizability Δα for close collisions is required.

Depolarized light scattering and neutron scattering spectra for noble gas fluids

1987 ◽  
Vol 87 (1) ◽  
pp. 687-696 ◽  
Author(s):  
A. A. van Well ◽  
I. M. de Schepper ◽  
P. Verkerk ◽  
R. A. Huijts
Keyword(s):  
Light Scattering ◽  
Neutron Scattering ◽  
Noble Gas ◽  
Scattering Spectra ◽  
Depolarized Light Scattering

scholarly journals The Virial Effect—Applications for SF6 and CH4 Thermal Plasmas

2019 ◽  
Vol 9 (5) ◽  
pp. 929
Author(s):  
Andriniaina Harry Solo ◽  
Pierre Freton ◽  
Jean-Jacques Gonzalez
Keyword(s):  
High Pressure ◽  
Pressure Range ◽  
High Pressures ◽  
Local Thermodynamic Equilibrium ◽  
Good Alternative ◽  
Mass Action ◽  
Lennard Jones ◽  
Engineering Data ◽  
Large Pressure ◽  
Mass Action Law

A tool based on the mass action law was developed to calculate plasma compositions and thermodynamic properties for pure gases and mixtures, assuming a local thermodynamic equilibrium for pressures of up to 300 bar. The collection of the data that was necessary for tool calculation was automated by another tool that was written using Python, and the formats for the model were adapted directly from the NIST and JANAF websites. In order to calculate the plasma compositions for high pressures, virial correction was introduced. The influences of the parameters that were chosen to calculate the Lennard–Jones (12-6) potential were studied. The results at high pressure show the importance of virial correction for low temperatures and the dependence of the dataset used. Experimental data are necessary to determine a good dataset, and to obtain interaction potential. However, the data available in the literature were not always provided, so they are not well-adapted to a large pressure range. Due to this lack, the formulation provided by L. I. Stiel and G. Thodos (Journal of Chemical and Engineering Data, vol. 7, 1962, p. 234–236) is a good alternative when the considered pressure is not close to the critical point. The results may depend strongly on the system studied: examples using SF6 and CH4 plasma compositions are given at high pressure.

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