ASTM D1824-95

Designation: D 1824 – 95 An American National Standard
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Apparent Viscosity of Plastisols and Organosols at Low
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Shear Rates
This standard is issued under the fixed designation D 1824; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) 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 3. Summary of Test Method
1.1 This test method covers the measurement of plastisol 3.1 The sample is conditioned to the proper temperature and
and organosol viscosity at low shear rates. its viscosity is determined.
1.2 Apparent viscosity at high shear rates is covered in Test
4. Significance and Use
Method D 1823.
4.1 The suitability of a dispersion resin for any given
1.3 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information application process is dependent upon its viscosity character-
only. istics.
4.2 The viscosity defines the flow behavior of a plastisol or
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the organosol under low shear. This viscosity relates to the
conditions encountered in pouring, casting, molding, and
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- dipping processes.
bility of regulatory limitations prior to use.
5. Apparatus
NOTE 1—This test method resembles ISO 3219-1977 in title only. The
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5.1 Viscometer.
content is significantly different.
5.2 Sample Containers, Tin Cans, or Glass Jars, 1-pt
2. Referenced Documents (500-mL) capacity. Minimum dimensions of containers should
be 80-mm (3.15-in.) inside diameter by 80 mm (3.15 in.) deep.
2.1 ASTM Standards:
2
5.3 Thermometer, ASTM Solvents Distillation Thermom-
D 1755 Specification for Poly(Vinyl Chloride) Resins
eter having a range from − 2 to + 52°C (28 to 126°F) and
D 1823 Test Method for Apparent Viscosity of Plastisols
conforming to the requirements for Thermometer 37C as
and Organosols at High Shear Rates by Extrusion Viscom-
2 prescribed in Specification E 1.
eter
3
5.4 Timer.
E 1 Specification for ASTM Thermometers
E 691 Practice for Conducting an Interlaboratory Study to
6. Conditioning
4
Determine the Precision of a Test Method
6.1 Maintain the plastisol or organosol samples at 236 1°C
2.2 ISO Standard:
(73 6 2°F) and 50 6 5 % relative humidity at all times after
ISO 3219-1977: Polymers in the Liquid, Emulsified, or
mixing and throughout the period of viscosity determinations.
Dispersed State—Determination of Viscosity With a Ro-
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tational Viscometer Working at a Defined Shear Rate
7. Procedure
7.1 Select a spindle that will read in the middle or upper
portion of the viscometer dial at the highest rotational speed to
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be used. Insert the spindle into the sample at approximately a
This test method is under the jurisdiction of ASTM Committee D-20 on Plastics
and is the direct responsibility of Subcommittee D20.15 on Thermoplastic Materials
45° angle. Withdraw the spindle and attach it to the viscometer.
(Section D20.15.08).
Taking care not to entrap an air bubble, lower the viscometer to
Current edition approved March 15, 1995. Published May 1995. Originally
immerse the spindle near the edge of the sample. Move the
published as D1824 – 61T. Last previous edition D1824 – 90.
sample so as to center the spindle. Adjust its depth to the
This edition contains changes in Sections 1, 2, and 11 to include an ISO
equivalency statement, to reference a high shear rate test method, and to include
immersion mark.
Keywords.
7.2 Start the viscometer at its lowest speed. Allow it to run
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Annual Book of ASTM Standards, Vol 08.01.
3
2 min. Record the scale reading during the next rotation.
Annual Book of ASTM Standards, Vol 14.03.
4
Annual Book of ASTM Standards, Vol 14.02.
5
Available from American National Standards Institute, 11 W. 42nd St., 13th
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Brookfield model RVF or LVF, or equivalent has been found satisfactory for
Floor, New York, NY 10036.
this purpose. Brookfield Engnrg. Labs, Inc., Stoughton, MA 02072.
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D 1824
TABLE 2 Precision of Viscosity Data at 20 RPM
Without stopping the viscometer, switch to the next higher
speed. Record the scale readings after 2 min at each speed in Average Values expressed as
Viscosity % of the Average
order from the lowest to the highest speeds.
A B C D
Resin (Poises) n n r R
7.3 Record the sample temperature at the conclusion of r R
V 24.72 8.5 12.1 23.8 34.0
viscosity readings.
IV 38.36 3.9 12.8 10.9
...