ASTM D4669-07(2013)e1
(Test Method)Standard Test Method for Polyurethane Raw Materials: Determination of Specific Gravity of Polyols
Standard Test Method for Polyurethane Raw Materials: Determination of Specific Gravity of Polyols
SIGNIFICANCE AND USE
4.1 These test methods are suitable for quality control, specification testing, and research. The specific gravity is necessary when converting kinematic viscosity to absolute viscosity.
SCOPE
1.1 These test methods measure the specific gravity of polyols. (See Note 1.)
1.2 This standard does not purport to address all of 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.Note 1—There is no known ISO equivalent to this standard.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D4669 −07 (Reapproved 2013)
Standard Test Method for
Polyurethane Raw Materials: Determination of Specific
Gravity of Polyols
This standard is issued under the fixed designation D4669; 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 (´) indicates an editorial change since the last revision or reapproval.
ε NOTE—Reapproved with editorial changes in April 2013.
1. Scope* 4. Significance and Use
1.1 These test methods measure the specific gravity of 4.1 These test methods are suitable for quality control,
polyols. (See Note 1.) specification testing, and research. The specific gravity is
necessary when converting kinematic viscosity to absolute
1.2 This standard does not purport to address all of the
viscosity.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
TEST METHOD A—SPECIFIC GRAVITY USING A
priate safety and health practices and determine the applica-
PYCNOMETER
bility of regulatory limitations prior to use.
5. Apparatus
NOTE 1—There is no known ISO equivalent to this standard.
5.1 Pycnometer, of 25 or 50-mL capacity, conical shape
2. Referenced Documents
with a capillary side arm overflow tube complete with a
2.1 ASTM Standards:
standard-taper ⁄12 ground-glass joint to receive a ground-glass
D883 Terminology Relating to Plastics
vented cap. A thermometer with a scale graduated from 12 to
D4052 Test Method for Density, Relative Density, and API
38°C in 0.2-degree divisions joins the neck of the flask with a
Gravity of Liquids by Digital Density Meter
standard-taper ⁄18 ground-glass joint. The thermometer con-
E2251 Specification for Liquid-in-Glass ASTM Thermom-
tained in the pycnometer shall be calibrated in accordance with
eters with Low-Hazard Precision Liquids
Specification E2251.
E202 Test Methods for Analysis of Ethylene Glycols and
5.2 Water Bath, capable of maintaining a temperature of
Propylene Glycols
25.0 6 0.05°C during the test.
3. Terminology
5.3 Thermometer, an ASTM Low Softening Point Ther-
3.1 Definitions—For definitions of terms used in these test
mometer having a range from -2 to +80°C and conforming to
methods see Terminology D883.
the requirements for Thermometer S15C as prescribed in
Specification E2251.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 specific gravity—the ratio of the weight in air of a
5.4 Analytical Balance, sensitive to 0.1 mg.
given volume of the material at a stated temperature to the
weight in air of an equal volume of water at a stated 6. Reagents
temperature. It shall be expressed as specific gravity, 25/25°C,
6.1 Chromic Acid Cleaning Solution —Prepare a saturated
indicating that the sample and reference water were both
solution of chromic acid (CrO ) in concentrated sulfuric acid
measured at 25°C.
(H SO , sp gr 1.84).
2 4
6.2 Acetone, reagent grade
These test methods are under the jurisdiction of ASTM Committee D20 on
Plastics and is the direct responsibility of Subcommittee D20.22 on Cellular
7. Sampling
Materials-PlasticsandElastomers.ItwasrecommendedtoASTMbytheCenterfor
the Polyurethane Industry of the American Chemistry Council.
7.1 High molecular weight polyester and polyether polyols
Current edition approved April 1, 2013. Published April 2013. Originally
contain molecules covering an appreciable range of molecular
approved in 1987. Last previous edition approved in 2007 as D4669 – 07. DOI:
10.1520/D4669-07R13E01.
weights. These have a tendency to fractionate during solidifi-
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
cation. Unless the material is a finely ground solid it is
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
necessary to melt (using no higher temperature than necessary)
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. and mix the polyol well before removing a sample for analysis.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D4669−07 (2013)
Since many polyols are hygroscopic, take care to provide where:
minimum exposure to atmospheric moisture during the sam-
S = sample used, g, and
pling.
W = water in the pycnometer, g.
8. Procedure
10. Precision and Bias
8.1 Clean the pycnometer by filling it with a chromic acid
10.1 Attempts to develop a precision and bias statement for
cleaning solution.Allow it to stand for a few hours, empty, and
this test method have not been successful. Data on precision
rinse well with distilled water.
and bias cannot be given for this reason. Anyone wishing to
8.2 Fil
...
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