1、Designation:D363298(Reapproved 2011)Standard Test Method forAccelerated Aging of Adhesive Joints by the Oxygen-Pressure Method1This standard is issued under the fixed designation D3632;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,
2、the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method describes how to estimate the relativeresistance to deterioration of adhesive films and adhesi
3、ve-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 ofchemicals such as fire retardants,preservatives,or woodextractives,can be evaluated by using materials containingthese chem
4、icals for adherends.1.2 This test method is primarily intended for elastomer-based construction adhesives,but is also applicable to othertypes of adhesives that may be susceptible to oxygen degrada-tion.This accelerated test does not correlate exactly with thenatural aging of the adhesive because of
5、 the varied conditionsof natural aging and the absence of factors such as moistureand stress.The results of this accelerated test are onlycomparative and must be evaluated against the performance ofbonded joints whose natural and accelerated aging character-istics are known.1.3 This standard does no
6、t purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D
7、143 Test Methods for Small Clear Specimens of TimberD454 Test Method for Rubber Deterioration by Heat andAirPressureD572 Test Method for RubberDeterioration by Heat andOxygenD573 Test Method for RubberDeterioration in an AirOvenD907 Terminology of AdhesivesD2339 Test Method for Strength Properties o
8、f Adhesives inTwo-Ply Wood Construction in Shear by Tension Loading3.Terminology3.1 DefinitionsMany definitions in this test method aredefined in Terminology D907.4.Summary of Test Method4.1 This test method entails subjecting specimens withknown physical properties to a controlled aging environment
9、for specific time periods,then observing the physical propertiesagain and noting any changes.The controlled environmentconsists of elevated temperature(70C)(158F)and oxygen atelevated pressure 2.07 MPa(300 psi).4.2 Three types of test specimens are offered.The partyrequesting the adhesive evaluation
10、 will choose the type ofspecimen to be used.Specimen TypeConfigurationPhysical PropertyTestedAwood-to-wood lapshear strengthBwood-to-metal lapshear strengthCunsupported filmflexibility4.3 Three different oxygen-pressure aging exposures areoffered.Use any exposure with any of the above specimens.The
11、party requesting the adhesive evaluation will choose theexposure to which the specimens are subjected.4.3.1 Constant exposure for 500 h with a single test of thephysical property at the end of 500 h.4.3.2 Constant exposure for 1000 h with a single test of thephysical property at the end of 1000 h.4.
12、3.3 Constant exposure for up to 1000 h with a series oftests of the physical property after 200,400,600,800,and1000 h.5.Significance and Use5.1 This test method is useful to the adhesive manufacturerin research and development or in manufacturing control.Theresults are also used for specification ac
13、ceptance or as a guidein adhesive selection.1This test method is under the jurisdiction of ASTM Committee D14 onAdhesives and is the direct responsibility of Subcommittee D14.70 on ConstructionAdhesives.Current edition approved Jan.1,2011.Published January 2011.Originallyapproved in 1977.Last previo
14、us edition approved in 2004 as D3632 98(2004).DOI:10.1520/D3632-98R11.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM webs
15、ite.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.2 The provisions for testing bonded specimens as well asfree films are made for two purposes.First,it is possible for aninteraction to occur between oxygen and chemicals or degra-datio
16、n products that may affect the degradation of the bondedjoints strength.Second,some increase in strength due tooxidative crosslinking may not be detrimental in a bondedassembly and in fact may be beneficial.Adhesives of thisbehavior are not satisfactorily tested by a film flexibility test.5.3 Some users of this test method will be most interested inthe performance of the bonded joint;some will be mostinterested in the performance of the adhesive.In the latter case,it is important to note that th
