1、Designation:D114918Standard Test Methods forRubber DeteriorationCracking in an Ozone ControlledEnvironment1This standard is issued under the fixed designation D1149;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last rev
2、ision.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 These test methods are used to estimate the ef
3、fect ofexposure,under surface tensile strain conditions,either dy-namic or static,in an atmosphere containing specified levels ofozone concentration,expressed as partial pressure(refer toNote 1),on vulcanized rubber,rubber compounds,molded orextruded soft rubber,and other specified materials,or as m
4、aybe determined empirically.The effect of naturally occurringsunlight or light from artificial sources is excluded.1.2 Previously published ASTM documents Test MethodD518 and Test Methods D3395 have been included in these testmethods,D1149,in 2007.Please refer to Note 2.1.2.1 Test Method D518 and Te
5、st Methods D3395 havehenceforth been withdrawn and superseded by Test MethodsD1149.When Test Methods D1149 is cited,or otherwisereferenced,a notation shall be included to this effect.Pleaserefer to section 3.2 for the appropriate references.1.3 The specified conditions of exposure to ozone in thecon
6、trolled environments are accelerated in comparison tooutdoor exposure.These accelerated ozone test methods maynot give results which correlate with outdoor exposure tests orservice performance.1.4 All materials,instruments,or equipment used for thedetermination of mass,force,dimension,ozone concentr
7、ation,partial pressure,temperature,velocity,and gas exchange rateshall have direct traceability to the National Institute forStandards and Technology,or other internationally recognizedorganization parallel in nature.1.5 The values stated in SI units are to be regarded asstandard.The values given in
8、 parentheses are for informationonly.Many of the stated SI units are direct conversions fromtheU.S.CustomarySystemtoaccommodatetheinstrumentation,practices,and procedures that existed prior tothe Metric Conversion Act of 1975.1.6 This standard involves hazardous materials,specificallyozone.It may al
9、so involve hazardous operations and equip-ment.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
10、of regulatory limitations prior to use.NOTE1A discussion and explanation regarding the measurement ofozone concentrations based upon parts of ozone per unit of air versuspartial pressure is provided in Test Methods D4575,specifically Appen-dices X1 and X2.Test Methods D4575 is also recommended as a
11、sourceof background information regarding standards involving materials ex-posed to ozone.1.7 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 Standard
12、s,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D518 Test Method for Rubber DeteriorationSurfaceCracking(Withdrawn 2007)3D1171 Test Method for Rubber DeteriorationSurfaceOzone Cracking Outdoors(Tr
13、iangular Specimens)D1349 Practice for RubberStandard Conditions for Test-ingD3182 Practice for RubberMaterials,Equipment,and Pro-cedures for Mixing Standard Compounds and PreparingStandard Vulcanized SheetsD3395 Test Methods for Rubber DeteriorationDynamicOzone Cracking in a Chamber(Withdrawn 2007)3
14、1These test methods are under the jurisdiction of ASTM Committee D11 onRubber and Rubber-like Materials and are the direct responsibility of SubcommitteeD11.15 on Degradation Tests.Current edition approved June 1,2018.Published September 2018.Originallyapproved in 1951.Last previous edition approved
15、 in 2016 as D1149 16.DOI:10.1520/D1149-18.2For 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 versi
16、on 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 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 D4482 Test Metho