Method for Determining the Viscoelastic Properties of Dilute Polymer Solutions at Audio‐Frequencies
作者:
Karl Sittel,
Prince E. Rouse,
Emerson D. Bailey,
期刊:
Journal of Applied Physics
(AIP Available online 1954)
卷期:
Volume 25,
issue 10
页码: 1312-1320
ISSN:0021-8979
年代: 1954
DOI:10.1063/1.1721552
出版商: AIP
数据来源: AIP
摘要:
A sensitive instrument for the measurement of the viscoelastic properties of dilute polymer solutions is described. It makes use of torsion pendulums with resonant frequencies in the range between 200 cps and 2300 cps. The test liquid is contained in a hollow oscillating disk. The shearing stress which is exerted at the liquid‐metal interface alters the frequency and rate of decay of the free oscillations of the pendulum. By means of an optical system, the oscillations of the pendulum are caused to modulate the light striking the cathode of a phototube. The frequency and the rate of decay of the resulting alternating voltage are measured electronically.The operation of the instrument and the factors affecting the precision of measurement are analyzed.
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