ASTM_D_865_-_11_2018.pdf

Designation:D86511(Reapproved 2018)Standard Test Method forRubberDeterioration by Heating in Air(Test TubeEnclosure)1This standard is issued under the fixed designation D865;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,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.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 thedeterioration induced by heating rubber specimens in indi-vidual test tube enclosures with circulating air.This isolationprevents cross contamination of compounds due to loss ofvolatile materials(for example,antioxidants)and their subse-quent migration into other rubber compounds(specimens).Theabsorption of such volatile materials may influence the degra-dation rate of rubber compounds.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 appro-priate safety,health,and 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 Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D412 Test Methods for Vulcanized Rubber and Thermoplas-tic ElastomersTensionD573 Test Method for RubberDeterioration in an AirOvenD1349 Practice for RubberStandard Conditions for Test-ingD2240 Test Method for Rubber PropertyDurometer Hard-nessD3182 Practice for RubberMaterials,Equipment,and Pro-cedures for Mixing 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 Methods3.1 Specimens of vulcanized rubber are exposed to thedeteriorating influence of air at specified elevated temperaturefor known periods of time,after which their physical propertiesare determined.These are compared with the properties deter-mined on the original unexposed specimens and the changesnoted.3.2 Unless otherwise specified,the determination of thephysical properties shall be carried out in accordance with testmethods in Test Methods 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 conflict between the provisions of this testmethod and those of detailed specifications or test methods fora particular material,the latter shall take precedence or ifotherwise agreed upon between customer and supplier orbetween laboratories.4.Significance and Use4.1 Rubber and rubber products must resist the deteriorationof physical properties with time caused by oxidative andthermal ageing.This test method determines these character-istics in a way that is free of some of the complications inherentin community-type ageing devices,that is where numerouscompounds(specimens)are aged in the same enclosure.1This 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 July 1,2018.Published August 2018.Originallyapproved in 1946.Last previous edition approved in 2011 as D865 11.DOI:10.1520/D0865-11R18.2For 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.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 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 4.2 The isolation of compounds(specimens)by the use ofindividual circulating air test tube enclosures prevents crosscontamination from volatile products and permits a morerepresentative assessment of ageing performance.4.3 Please refer to the Annex in Test Method D573 forimportant information on standard compounds used for preci-sion testing for accelerated test ageing evaluation