Spinning drop tensioextensiometer

Details Spinning drop tensioextensiometer Spinning drop tensioextensiometer

1991-08-08

1992-09-29

Williams, Hezron E.

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Surface tension

G01N 1302

Patent

active

051506076

ABSTRACT:
A spinning drop tensioextensiometer provides for the ability to rotate a tube carrying two different polymers, under conditions which keeps the polymers melted, and which causes the less dense polymer to form a drop of a generally cigar shape. By measuring the diameter of the drop at desired angular velocities upper and lower bounds for interfacial tension can be determined. Further, these bounds define relaxation curves for the extensional relaxation of a blend of two polymers. The polymers are placed in a glass tube that is rotated at high speed within an oven that has an opening through which the diameter of the inner polymer drop can be measured utilizing optical equipment, such as a video camera projecting an image onto a monitor.

REFERENCES:
patent: 4250741 (1981-02-01), Scriver, II et al.
patent: 4523456 (1985-06-01), Baird et al.
patent: 4644782 (1987-02-01), Joseph
Article entitled "Measurement of Interfacial and Surface Tensions in Polymer Systems" by Patterson et al., J. Polymer Sci.: Part C, No. 34, pp. 31-43 (1971).
Article from Polymer Engineering and Science, Mar. 1986, vol. 26, No. 6, "Measuring of Interfacial Tensions of Molten Polymer Systems by Means of the Spinning Drop Method", by J. J. Elmendrop and G. De Vos, pp. 415-417.

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