Accession Number : AD0777953
Title : The Applicability of Light Scattering Spectroscopy to the Measurement of the Viscoelastic Parameters of Lubricants.
Descriptive Note : Technical rept.,
Corporate Author : CATHOLIC UNIV OF AMERICA WASHINGTON D C VITREOUS STATE LAB
Personal Author(s) : Dill,James F. ; Drake,Peter W. ; Litovitz,Theodore A.
Report Date : MAR 1974
Pagination or Media Count : 43
Abstract : Various techniques for the measurement of the viscoelastic properties of lubricants are described. These include a novel method using light scattering and photon correlation spectroscopy. This combination of techniques has been applied to a detailed viscoelastic study of the lubricant 5P4E (a polyphenyl ether manufactured by Monsanto Chemical Corp.). The results reported include; Sound velocity measurements obtained by both light scattering and ultrasonics; measurements of the structural relaxation function and the average structural relaxation times using digital correlation spectroscopy; and static shear viscosity. These measurements have all been made as a function of pressure. The results demonstrate that the light scattering techniques can extend the range of viscosity measurements by at least four orders of magnitude. (Modified author abstract)
Descriptors : *Viscoelasticity, *Lubricants, *Light scattering, Pressure, Acoustic velocity, Correlation techniques, Relaxation time, Shear properties, Viscosity, Phenyl ether, Spectrum analysis, Spectroscopy, Ultrasonics, Fluids, Measurement
Subject Categories : Lubricants and Hydraulic Fluids
Atomic and Molecular Physics and Spectroscopy
Distribution Statement : APPROVED FOR PUBLIC RELEASE