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Designation: D 2584 – 94
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
Ignition Loss of Cured Reinforced Resins1
This standard is issued under the fixed designation D 2584; 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.
5. Apparatus
5.1 Crucible, platinum or porcelain, approximately 30-mL
capacity.
5.2 Electric Muffle Furnace, capable of maintaining a temperature of 565 6 28°C (10506 50°F).
1. Scope
1.1 This test method covers the determination of the ignition
loss of cured reinforced resins. This ignition loss can be
considered to be the resin content within the limitations of 4.2.
1.2 The values stated in SI units are to be regarded as the
standard.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
responsibility of whoever uses this standard to consult and
establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
6. Test Specimen
6.1 A minimum of three specimens shall be tested for each
sample.
NOTE 1—It is often convenient to use samples obtained from specimens
that have been tested for mechanical properties such as flexural or tensile
strength. Specimens obtained from these samples must be dry and the
fractured areas removed, leaving square, unfrayed faces, before being
weighed and ignited.
2. Referenced Documents
2.1 ASTM Standards:
D 618 Practice for Conditioning Plastics and Electrical
Insulating Materials for Testing2
6.2 The specimen shall weigh approximately 5 g with a
maximum size of 2.5 by 2.5 cm by thickness (1 by 1 in. by
thickness).
3. Summary of Test Method
3.1 The specimen contained in a crucible is ignited and
allowed to burn until only ash and carbon remain. The
carbonaceous residue is reduced to an ash by heating in a
muffle furnace at 565°C (1050°F), cooled in a desiccator, and
weighed.
NOTE 2—Materials that have gross differences in the ratio of resin to
reinforcement within an area as small as 2.5 by 2.5 cm (1 by 1 in.) may
require a larger specimen area than that listed in 6.2. If larger specimens
are utilized, it will be necessary to cut into approximately 2.5 by 2.5-cm
(1 by 1-in.) pieces and place in a crucible of sufficient size to contain the
specimen.
7. Conditioning
7.1 Conditioning—Condition the test specimens at 236 2°C
(73.4 6 3.6°F) and 50 6 5 % relative humidity for not less
than 40 h prior to test in accordance with Procedure A of
Practice D 618 for those tests where conditioning is required.
In cases of disagreement, the tolerances shall be6 1°C
(61.8°F) and 62 % relative humidity.
7.2 Test Conditions—Conduct tests in the standard laboratory atmosphere of 23 6 2°C (73.4 6 3.6°F) and 50 6 5 %
relative humidity, unless otherwise specified in the test methods or in the specification. In cases of disagreement, the
tolerances shall be 61°C (61.8°F) and 62 % relative humidity.
4. Significance and Use
4.1 This test method can be used to obtain the ignition loss
of a cured reinforced resin sample.
4.2 If only glass fabric or filament is used as the reinforcement of an organic resin that is completely decomposed to
volatile materials under the conditions of this test and the small
amount of volatiles (water, residual solvent) that may be
present is ignored, the ignition loss can be considered to be the
resin content of the sample.
4.2.1 This test method does not provide a measure of resin
content for samples containing reinforcing materials that lose
weight under the conditions of the test or containing resins that
do not decompose to volatile materials released by ignition.
8. Procedure
8.1 Heat a crucible at 500 to 600°C for 10 min or more.
Cool to room temperature in a desiccator and weigh to the
nearest 1.0 mg.
8.2 Place the specimen in the crucible and weigh to the
1
This test method is under the jurisdiction of ASTM Committee D-20 on Plastics
and is the direct responsibility of Subcommittee D20.18 on Reinforced Thermosetting Plastics.
Current edition approved Oct. 15, 1994. Published December 1994. Originally
published as D 2584 – 67 T. Last previous edition D 2584 – 68 (1985).
2
Annual Book of ASTM Standards, Vol 08.01.
1
D 2584
s 5 [email protected] (X 2 2 n~X¯! 2 #/~n 2 1!
nearest 1.0 mg. Heat the crucible and specimen in a bunsen
flame until the contents ignite. Maintain such a temperature
that the specimen burns at a uniform and moderate rate until
only ash and carbon remain when the burning ceases.
where:
s 5 estimated standard deviation,
X 5 value of a single observation,
n 5 number of observations,
X¯ 5 arithmetic mean of the set of observations.
9.3 Subtract the lowest specimen ignition loss from the
highest specimen ignition loss for the sample and report as the