ASTM D3632-98(2011)
(Test Method)Standard Test Method for Accelerated Aging of Adhesive Joints by the Oxygen-Pressure Method
Standard Test Method for Accelerated Aging of Adhesive Joints by the Oxygen-Pressure Method
SIGNIFICANCE AND USE
This test method is useful to the adhesive manufacturer in research and development or in manufacturing control. The results are also used for specification acceptance or as a guide in adhesive selection.
The provisions for testing bonded specimens as well as free films are made for two purposes. First, it is possible for an interaction to occur between oxygen and chemicals or degradation products that may affect the degradation of the bonded joints strength. Second, some increase in strength due to oxidative crosslinking may not be detrimental in a bonded assembly and in fact may be beneficial. Adhesives of this behavior are not satisfactorily tested by a film flexibility test.
Some users of this test method will be most interested in the performance of the bonded joint; some will be most interested in the performance of the adhesive. In the latter case, it is important to note that the true variance (error mean square) of the strength of the adhesive may be obscured when the tested control specimens or the tested aged specimens show wood failure.
Conflict of Procedure—If the procedures of this test method conflict with those of detailed product specifications or manufacturer's use instructions for a particular material, then use the latter.
SCOPE
1.1 This test method describes how to estimate the relative resistance to deterioration of adhesive films and adhesive-bonded joints placed in a high-pressure oxygen environment. The instructions include both wood-to-wood and wood-to-metal joints as well as free film of adhesive. The effects of chemicals such as fire retardants, preservatives, or wood extractives, can be evaluated by using materials containing these chemicals for adherends.
1.2 This test method is primarily intended for elastomer-based construction adhesives, but is also applicable to other types of adhesives that may be susceptible to oxygen degradation. This accelerated test does not correlate exactly with the natural aging of the adhesive because of the varied conditions of natural aging and the absence of factors such as moisture and stress. The results of this accelerated test are only comparative and must be evaluated against the performance of bonded joints whose natural and accelerated aging characteristics are known.
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 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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Standards Content (Sample)
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Designation: D3632 − 98 (Reapproved 2011)
Standard Test Method for
Accelerated Aging of Adhesive Joints by the Oxygen-
1
Pressure Method
This standard is issued under the fixed designation D3632; 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 D573 Test Method for Rubber—Deterioration in an Air
Oven
1.1 This test method describes how to estimate the relative
D907 Terminology of Adhesives
resistance to deterioration of adhesive films and adhesive-
D2339 Test Method for Strength Properties of Adhesives in
bonded joints placed in a high-pressure oxygen environment.
Two-Ply Wood Construction in Shear by Tension Loading
The instructions include both wood-to-wood and wood-to-
metal joints as well as free film of adhesive. The effects of
3. Terminology
chemicals such as fire retardants, preservatives, or wood
extractives, can be evaluated by using materials containing
3.1 Definitions—Many definitions in this test method are
these chemicals for adherends. defined in Terminology D907.
1.2 This test method is primarily intended for elastomer-
4. Summary of Test Method
based construction adhesives, but is also applicable to other
types of adhesives that may be susceptible to oxygen degrada-
4.1 This test method entails subjecting specimens with
tion. This accelerated test does not correlate exactly with the
known physical properties to a controlled aging environment
natural aging of the adhesive because of the varied conditions
forspecifictimeperiods,thenobservingthephysicalproperties
of natural aging and the absence of factors such as moisture
again and noting any changes. The controlled environment
and stress. The results of this accelerated test are only
consists of elevated temperature (70°C) (158°F) and oxygen at
comparative and must be evaluated against the performance of
elevated pressure 2.07 MPa (300 psi).
bonded joints whose natural and accelerated aging character-
4.2 Three types of test specimens are offered. The party
istics are known.
requesting the adhesive evaluation will choose the type of
1.3 This standard does not purport to address all of the
specimen to be used.
safety concerns, if any, associated with its use. It is the
Physical Property
Specimen Type Configuration
responsibility of the user of this standard to establish appro-
Tested
A wood-to-wood lap shear strength
priate safety and health practices and determine the applica-
B wood-to-metal lap shear strength
bility of regulatory limitations prior to use.
C unsupported film flexibility
4.3 Three different oxygen-pressure aging exposures are
2. Referenced Documents
offered. Use any exposure with any of the above specimens.
2
2.1 ASTM Standards:
The party requesting the adhesive evaluation will choose the
D143 Test Methods for Small Clear Specimens of Timber
exposure to which the specimens are subjected.
D454 Test Method for Rubber Deterioration by Heat andAir
4.3.1 Constant exposure for 500 h with a single test of the
Pressure
physical property at the end of 500 h.
D572 Test Method for Rubber—Deterioration by Heat and
4.3.2 Constant exposure for 1000 h with a single test of the
Oxygen
physical property at the end of 1000 h.
4.3.3 Constant exposure for up to 1000 h with a series of
tests of the physical property after 200, 400, 600, 800, and
1
This test method is under the jurisdiction of ASTM Committee D14 on
1000 h.
Adhesives and is the direct responsibility of Subcommittee D14.70 on Construction
Adhesives.
Current edition approved Jan. 1, 2011. Published January 2011. Originally
5. Significance and Use
approved in 1977. Last previous edition approved in 2004 as D3632 – 98 (2004).
DOI: 10.1520/D3632-98R11.
5.1 This test method is useful to the adhesive manufacturer
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
in research and development or in manufacturing control. The
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
results are also used for specification acceptance or as a guide
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. in adhesive selection.
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D3632 − 98 (2011)
5.2 The provisions for testing bonded specimens as well as 6.1.1.4 Use a thermostat to control automatically the tem-
free films are made for two purposes. First, it is possible for an perature of the heating medium.
interaction to occur between oxygen and chemicals or degra- 6.1.1.5 Record the temp
...
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