Standard Test Methods for Rheological Properties of Non-Newtonian Materials by Rotational (Brookfield type) Viscometer

SIGNIFICANCE AND USE
Test Method A is used for determining the apparent viscosity at a given rotational speed, although viscosities at two or more speeds give better characterization of a non-Newtonian material than does a single viscosity measurement.
With Test Methods B and C, the extent of shear thinning is indicated by the drop in viscosity with increasing viscometer speed. The degree of thixotropy is indicated by comparison of viscosities at increasing and decreasing viscometer speeds (Test Method B), viscosity recovery (Test Method B), or viscosities before and after high shear (combination of Test Methods B and C). The high-shear treatment in Test Method C approximates shearing during paint application. The viscosity behavior measured after high shear is indicative of the characteristics of the paint soon after application.
SCOPE
1.1 These test methods cover the determination of the apparent viscosity and the shear thinning and thixotropic properties of non-Newtonian materials in the shear rate range from 0.1 to 50 s1.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 This standard does not purport to address the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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ASTM D2196-05 - Standard Test Methods for Rheological Properties of Non-Newtonian Materials by Rotational (Brookfield type) Viscometer
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D2196 – 05
Standard Test Methods for
Rheological Properties of Non-Newtonian Materials by
1
Rotational (Brookfield type) Viscometer
This standard is issued under the fixed designation D2196; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 4. Significance and Use
1.1 These test methods cover the determination of the 4.1 Test Method A is used for determining the apparent
apparent viscosity and the shear thinning and thixotropic viscosityatagivenrotationalspeed,althoughviscositiesattwo
properties of non-Newtonian materials in the shear rate range ormorespeedsgivebettercharacterizationofanon-Newtonian
−1
from 0.1 to 50 s . material than does a single viscosity measurement.
1.2 The values stated in SI units are to be regarded as the 4.2 WithTestMethodsBandC,theextentofshearthinning
standard. The values given in parentheses are for information isindicatedbythedropinviscositywithincreasingviscometer
only. speed. The degree of thixotropy is indicated by comparison of
1.3 This standard does not purport to address the safety viscosities at increasing and decreasing viscometer speeds
concerns, if any, associated with its use. It is the responsibility (Test Method B), viscosity recovery (Test Method B), or
of the user of this standard to establish appropriate safety and viscosities before and after high shear (combination of Test
health practices and determine the applicability of regulatory Methods B and C).The high-shear treatment inTest Method C
limitations prior to use. approximates shearing during paint application. The viscosity
behavior measured after high shear is indicative of the char-
2. Referenced Documents
acteristics of the paint soon after application.
2
2.1 ASTM Standards:
5. Apparatus
E1 Specification for ASTM Liquid-in-Glass Thermometers
5.1 Rotational-type viscometers having at least four speeds,
3. Summary of Test Method
such as:
3.1 Test Method A consists of determining the apparent 5.1.1 Brookfield Dial-Reading (Analog) Viscometer, or
viscosity of coatings and related materials by measuring the
equivalent having multiple rotational speeds with set of
torque on a spindle rotating at a constant speed in the material. spindles; or
3.2 Test Methods B and C consist of determining the shear
5.1.2 Brookfield Digital Viscometer, or equivalent having
thinning and thixotropic (time-dependent) rheological proper- multiple rotational speeds, with set of spindles.
3
ties of the materials. The viscosities of these materials are
5.2 Thermometer—ASTM thermometer having a range
determined at a series of prescribed speeds of a rotational-type from 20 to 70°C and conforming to the requirements for
viscometer. The agitation of the material immediately preced-
Thermometer 49C as prescribed in Specification E1.
3
ing the viscosity measurements is carefully controlled. 5.3 Containers, round 0.5-L (1-pt) can, 85 mm (3 ⁄8 in.) in
diameter, or 1-L (1-qt) can, 100 mm (4 in.) in diameter.
5.4 Shaker, or equivalent machine capable of vigorously
1
These test methods are under the jurisdiction of ASTM Committee D01 on
shaking the test specimen.
Paint and Related Coatings, Materials, and Applications and are the direct
responsibility of Subcommittee D01.24 on Physical Properties of Liquid Paints and
6. Materials
Paint Materials.
Current edition approved July 1, 2005. Published August 2005. Originally
6.1 Standard Oils, calibratedinabsoluteviscosity,millipas-
approved in 1963. Last previous edition approved in 1999 as D2196–99. DOI:
cal seconds.
10.1520/D2196-05.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
7. Calibration of Apparatus
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
7.1 Select at least two standard oils of viscosities differing
the ASTM website.
by at least 0.5 Pa·s (5P) within the viscosity range of the
3
Pierce, P. E., “Measurement of Rheology of Thixotropic Organic Coatings and
material being measured and in the range of the viscometer.
Resins with the Brookfield Viscometer,” Journal of Paint Technology, Vol 43, No.
557, 1971, pp. 35–43. Condition the oils as closely as possible to 25.0°C (or other
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D2196 – 05
TABLE 2 Viscosity Variation of Cannon Viscosity Standards
agreed-upon temperature) for1hina 0.5-
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