1、Designation:D45404(Reapproved 2019)Standard Test Method forRubber Deterioration by Heat and Air Pressure1This standard is issued under the fixed designation D454;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revisi
2、on.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This test method covers a procedure to determine
3、theinfluence of elevated temperature and air pressure on thephysical properties of vulcanized rubber.The results of this testmay not give an exact correlation with service performancesince performance conditions vary widely.The test may,however,be used to evaluate rubber compounds on a labora-tory c
4、omparison basis.It will be most applicable to perfor-mance under conditions of increased temperature and airpressure.NOTE1For evaluating rubber vulcanizates under less severe condi-tions that more nearly approach natural aging,the use of Test MethodsD573 and D865 is recommended.1.2 The values stated
5、 in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3 This standard does not 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,health,a
6、nd environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International
7、 Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D15 Method of Compound and Sample Preparation forPhysical Testing of Rubber Products(Withdrawn 1975)3D412 Test Methods for Vulcanized Rubbe
8、r and Thermoplas-tic ElastomersTensionD572 Test Method for RubberDeterioration by Heat andOxygenD573 Test Method for RubberDeterioration in an AirOvenD865 Test Method for RubberDeterioration by Heating inAir(Test Tube Enclosure)D3182 Practice for RubberMaterials,Equipment,and Pro-cedures for Mixing
9、Standard Compounds and PreparingStandard Vulcanized SheetsD3183 Practice for RubberPreparation of Pieces for TestPurposes from ProductsD4483 Practice for Evaluating Precision for Test MethodStandards in the Rubber and Carbon Black ManufacturingIndustries3.Summary of Test Method3.1 Specimens of vulca
10、nized rubber are exposed to thedeteriorating influence of air at specified elevated temperatureand pressure for known periods of time,after which theirphysical properties are determined.These are compared withthe properties determined on the original specimens and thechanges noted.3.2 Unless otherwi
11、se specified,the determination of thephysical properties shall be carried out in accordance with TestMethods D412.3.3 Except as may be otherwise specified in this testmethod,the requirements of Practices D3182 and D3183 shallbe complied with and are made part of this test method.3.4 In case of confl
12、ict between the provisions of this testmethod and those of detailed specifications or test methods fora particular material,the latter shall take precedence.4.Significance and Use4.1 Rubber and rubber products must resist the deteriorationof physical properties with time caused by oxidative and1This
13、 test method is under the jurisdiction of ASTM Committee D11 on Rubberand Rubber-like Materials and is the direct responsibility of Subcommittee D11.15on Degradation Tests.Current edition approved Nov.1,2019.Published December 2019.Originallyapproved in 1952.Last previous edition approved in 2015 as
14、 D454 04(2015).DOI:10.1520/D0454-04R19.2For 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 website.3The last approved version
15、of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in th
16、e Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 thermal aging.This test method allows these performanceproperties to be determined under the accelerated conditions ofhigh air pressure and at elevated temperatures.4.2 Refer to the Annex in Test Method D573 for importantinformation on standard compounds used for precision testingfor accelerated test aging evaluation.
