Accession Number:

AD0641484

Title:

AN INVESTIGATION OF THE RHEOLOGY OF GELS,

Descriptive Note:

Corporate Author:

ARMY MISSILE COMMAND REDSTONE ARSENAL ALA PROPULSION LAB

Personal Author(s):

• Blatt,Joel H.
• Allan,Barry D.

Report Date:

1966-08-22

Pagination or Media Count:

22.0

Abstract:

The report describes work accomplished on the rising sphere rheometer and efforts to develop a standard gel to be used for interlaboratory comparisons both on the rising sphere and on the Brookfield viscometer. The construction details and wiring for the rheometer and an optical method for checking the rate of rise are presented. It was found that the accuracy of the rheometer could be greatly improved by expanding and displaying the output scale on a Leeds and Northrup recorder. Several batches of a standard gel 0.15-percent Carbopol 940 in water were tried but gave inconsistent results with this rheometer, as well as not giving consistent densities. The results of these tests seem to indicate that Carbopol 940 is not suitable as a component in standard gels, if unsophisticated mixing methods are to be used. In addition, Cabosil 2 concentrations tried, Methocell 90HG-D65 3 concentrations tried, and Cellosize 5229-JJ were tried with water all mixed by hand shaking. All samples failed to demonstrate reasonable yield values or settled on standing. Author

Descriptors:

• *GELS
• *RHEOLOGY
• VISCOMETERS
• STANDARDS
• MEASUREMENT

Subject Categories:

• Test Facilities, Equipment and Methods
• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE