Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Viscosity
Patent
1993-10-14
1994-10-25
Raevis, Robert
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Viscosity
G01N 1102
Patent
active
053577833
ABSTRACT:
An improvement in a rheometer and the method for measuring rheological properties of a viscoelastic test specimen at different temperatures, at which different temperatures the viscoelastic properties exhibit a relatively wide difference, wherein the test specimen is placed between and is coupled with opposed plates, one of the opposed plates is oscillated angularly relative the other of the opposed plates, and the angular displacement of one of the plates relative to the other of the plates and the torque associated with the relative angular displacement are measured within an optimum range of torque and angular displacement for determining the rheological properties, couples a first contact area on one of the opposed plates with the test specimen when the test specimen is at one of the different temperatures, and couples a second contact area on the one of the opposed plates with the test specimen when the test specimen is at another of the different temperatures, the first contact area being different from the second contact area such that, by virtue of the difference between the first and second contact areas, the torque and the relative angular displacement measured at each of the one and the another of the different temperatures fall within the optimum range.
REFERENCES:
patent: 3282091 (1966-11-01), Webb
patent: 3292422 (1966-12-01), Banks
patent: 3818750 (1974-06-01), Karper et al.
patent: 4552025 (1985-11-01), Barker et al.
patent: 5271266 (1993-12-01), Eschbach
Raevis Robert
Rheometrics, Inc.
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