ASTM D4669-07
(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
SCOPE
1.1 These test methods measure the specific gravity of polyols. (See Note 0.)
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 0
There is no equivalent ISO standard.
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Designation:D4669 −07
StandardTest Method for
Polyurethane Raw Materials: Determination of Specific
1
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.
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, as a
polyols. (See Note 1.)
specification test, and for research. It is necessary when
converting from kinematic to absolute viscosity.
1.2 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
TEST METHOD A—SPECIFIC GRAVITY USING A
responsibility of the user of this standard to establish appro-
PYCNOMETER
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
5. Apparatus
NOTE 1—There is no equivalent ISO standard.
5.1 Pycnometer, of 25 or 50-mL capacity, conical shape
with a capillary side arm overflow tube complete with a
2. Referenced Documents
5
standard-taper ⁄12 ground-glass joint to receive a ground-glass
2
2.1 ASTM Standards:
vented cap. A thermometer with a scale graduated from 12 to
D883 Terminology Relating to Plastics
38°C in 0.2-degree divisions joins the neck of the flask with a
D4052 Test Method for Density, Relative Density, and API
10
standard-taper ⁄18 ground-glass joint. The thermometer con-
Gravity of Liquids by Digital Density Meter
tained in the pycnometer shall be calibrated in accordance with
E1 Specification for ASTM Liquid-in-Glass Thermometers
Specification E1.
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 15°C as prescribed in
Specification E1.
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
3
measured at 25°C.
(H SO , sp gr 1.84).
2 4
7. Sampling
1
These test methods are under the jurisdiction of ASTM Committee D20 on
Plastics and is the direct responsibility of Subcommittee D20.22 on Cellular
7.1 Polyesters and polyethers usually contain molecules
Materials-PlasticsandElastomers.ItwasrecommendedtoASTMbytheCenterfor
covering an appreciable range of molecular weights. These
the Polyurethane Industry of the American Chemistry Council.
have a tendency to fractionate during solidification. Unless the
Current edition approved Nov. 1, 2007. Published November 2007. Originally
material is a finely ground solid it is necessary to melt (using
approved in 1987. Last previous edition approved in 2002 as D4669 – 98(2002).
DOI: 10.1520/D4669-07.
no higher temperature than necessary) and mix the resin well
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
before removing a sample for analysis. Since many polyols are
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
hygroscopic, take care to provide minimum exposure to
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. atmospheric moisture during the sampling.
*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
1
---------------------- Page: 1 ----------------------
D4669−07
8. Procedure
W = water in the pycnometer, g.
8.1 Clean the pycnometer by filling it with a chromic acid
10. Precision and Bias
cleaning solution.Allow it to stand for a few hours, empty, and
rinse well with distilled water.
10.1 Attempts to develop a precision and bias statement for
8.2 Fill the pycnometer with freshly boiled distilled water
this test method have not been successful. Data on precision
cooled to 22 to 24°C, and set the pycnometer thermometer in
and bias cannot be given for this reason. Anyone wishing to
place carefully, avoiding trapping of air
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
e1
Designation:D 4669–98 (Reapproved 2002) Designation: D 4669 – 07
Standard Test Method for
Polyurethane Raw Materials: Determination of Specific
1
Gravity of Polyols
This standard is issued under the fixed designation D 4669; 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.
1
e NOTE—Editorially updated the organizational reference in Footnote 1 in November 2002.
1. Scope*
1.1This test method measures the specific gravity of polyols using a pycnometer. (See
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 equivalent ISO standard.
2. Referenced Documents
2.1 ASTM Standards:
D883Terminology Relating to Plastics
E1Specification for ASTM Thermometers
2
E202Test Methods for Analysis of Ethylene Glycols and Propylene Glycols ASTM Standards:
D 883 Terminology Relating to Plastics
D 4052 Test Method for Density and Relative Density of Liquids by Digital Density Meter
E 1 Specification for ASTM Liquid-in-Glass Thermometers
E 202 Test Methods for Analysis of Ethylene Glycols and Propylene Glycols
3. Terminology
3.1 Definitions—For definitions of terms used in thisthese test methods see Terminology D 883.
3.2 Description of Term Specific to This Standard:
3.2.1 specific gravity—the ratio of the weight in air of a given volume of the material at a stated temperature to the weight in
air of an equal volume of water at a stated temperature. It shall be expressed as specific gravity, 25/25°C, indicating that the sample
and reference water were both measured at 25°C.
4. Significance and Use
4.1This test method is suitable for quality control, as a specification test, and for research. It is necessary when converting from
kinematic to absolute viscosity.
4.1 These test methods are suitable for quality control, as a specification test, and for research. It is necessary when converting
from kinematic to absolute viscosity.
TEST METHOD A—SPECIFIC GRAVITY USING A PYCNOMETER
5. Apparatus
5.1 Pycnometer, of 25 or 50-mLcapacity, conical shape with a capillary side arm overflow tube complete with a standard-taper
5
⁄12 ground-glass joint to receive a ground-glass vented cap.Athermometer with a scale graduated from 12 to 38°C in 0.2-degree
1
ThisThese test method ismethods are under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.22 on Cellular
Materials— - Plastics and Elastomers. It was recommended to ASTM by the AllianceCenter for the Polyurethane Industry’s Polyurethane Raw Materials Analysis
Committee.Industry of the American Chemistry Council.
Current edition approved November 10, 2002.Nov. 1, 2007. Published January 2003.November 2007. Originally approved in 1987. Last previous edition approved in
19962002 as D 4669 – 98(2002).
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*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.
1
---------------------- Page: 1 ----------------------
D 4669 – 07
10
divisions joins the neck of the flask with a standard-taper ⁄18 ground-glass joint. The thermometer contained in the pycnometer
shall be calibrated in accordance with Specification E 1.
5.2 Water Bath, capable of maintaining a temperature of 25.0 6 0.05°C during the test.
5.3 Thermometer, an ASTM Low Softening Point Thermometer having a range from -2 to +80°C and conforming to the
requirements for Thermometer 15°C as prescribed in Specification E 1.
5.4 Analytical Balance, sensitive to 0.1 mg.
6. Reagents
6.1 Chromic Acid Cleaning Solution —Prepare a saturated solution of chromic acid (CrO ) in concentrated sulfuric acid
3
(H SO , sp gr 1.84).
2 4
7. Sampling
7.1 Polyesters and polyethers usually contain molecules covering an appreciable range of molecular weigh
...
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