Abstract
A new viscosity measuring system was designed and set up employing Rayleigh light scattering and a photon correlation technique using a diamond anvil high pressure cell. Two kinds of experiments were attempted. The one was the measurement for dilute suspensions of polystyrene latex spheres in liquid lubricants and a W/O emulsion. Correlation functions induced by BrownJan motion of small spheres in the lubricants were observed and the viscosities were obtained whose measurement time was one tenth shorter than that of falling body method. The other experiment was the measurement for 5 P 4 E (polyphenyl ether) and DOP (dioctylphthalate) without mixing polystyrene spheres. Very weak but observable correlation functions concerning structural relaxation were observed and the viscosities of solidified lubricants (about 109 Pa·s), obtained in very short time by introducing shift factor for relaxation time, were consistent with those extrapolated from data of falling body method.
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