1、Designation:D57304(Reapproved 2019)Standard Test Method forRubberDeterioration in an Air Oven1This standard is issued under the fixed designation D573;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number
2、 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 theinfluenc
3、e of elevated temperature on the physical properties ofvulcanized rubber.The results of this test method may not givean exact correlation with service performance since perfor-mance conditions vary widely.This test method may,however,be used to evaluate rubber compounds on a laboratory com-parison b
4、asis.1.2 The values stated 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 ap
5、pro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.(For specific precautionary statement,see Note 1.)1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization e
6、stablished in the Decision on Principles for theDevelopment of International 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 Testi
7、ng of Rubber Products(Withdrawn 1975)3D412 Test Methods for Vulcanized Rubber and Thermoplas-tic ElastomersTensionD1349 Practice for RubberStandard Conditions for Test-ingD3182 Practice for RubberMaterials,Equipment,and Pro-cedures for Mixing Standard Compounds and PreparingStandard Vulcanized Sheet
8、sD3183 Practice for RubberPreparation of Pieces for TestPurposes from ProductsD3184 Practice for RubberEvaluation of NR(NaturalRubber)D3185 Test Methods for RubberEvaluation of SBR(Styrene-Butadiene Rubber)Including Mixtures With OilD4483 Practice for Evaluating Precision for Test MethodStandards in
9、 the Rubber and Carbon Black ManufacturingIndustriesE145 Specification for Gravity-Convection and Forced-Ventilation Ovens3.Summary of Test Method3.1 Specimens of vulcanized rubber are exposed to thedeteriorating influence of air at specified elevated temperaturesfor known periods of time,after whic
10、h their physical propertiesare determined.These are compared with the properties deter-mined on the original specimens and the changes noted.3.2 Unless otherwise specified,the determination of thephysical properties shall be carried out in accordance with TestMethods D412.3.3 Except as may be otherw
11、ise 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 conflict between the provisions of this testmethod and those of detailed specifications or test methods fora particular material,the latter shall
12、take precedence.4.Significance and Use4.1 Rubber and rubber products must resist the deteriorationof physical properties with time caused by oxidative andthermal aging.This test method provides a way to assess theseperformance characteristics of rubber,under certain acceler-ated conditions as specif
13、ied.4.2 Please refer to Annex A1 for important information onstandard compounds used for precision testing for acceleratedtest aging evaluation.1This test method is under the jurisdiction of ASTM Committee D11 on Rubberand Rubber-like Materials and is the direct responsibility of Subcommittee D11.15
14、on Degradation Tests.Current edition approved Nov.1,2019.Published December 2019.Originallyapproved in 1940.Last previous edition approved in 2015 as D573 04(2015).DOI:10.1520/D0573-04R19.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceast
15、m.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959
16、.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 5.Apparatus5.1 Type IIB ovens specified in Test Method E145 aresatisfactory for use through 70C.For higher temperatures,Type IIA ovens are necessary.5.1.1 The interior si
