1、Designation:D114907(Reapproved 2012)Standard 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
2、 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 Department of Defense.1.Scope1.1 These test methods are used to es
3、timate the effect 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 mate
4、rials,or as maybe 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 Metho
5、d D518 and Test Methods D3395 havehenceforth been withdrawn and superseded by Test MethodsD1149.When Test Methods D1149 is cited,or otherwisereferenced,a notation shall be included to this effect.Pleaserefer to section 3.2 for the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 oz
6、one in thecontrolled 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,o
7、zone concentration,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 va
8、lues given in 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,specificallyoz
9、one.It may also 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 and health practices and determine the applica-bility o
10、f 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 s
11、ourceof background information regarding standards involving materials ex-posed to ozone.2.Referenced Documents2.1 ASTM Standards:2D518 Test Method for Rubber DeteriorationSurfaceCracking(Withdrawn 2007)3D1171 Test Method for Rubber DeteriorationSurfaceOzone Cracking Outdoors or Chamber(Triangular S
12、peci-mens)D1349 Practice for RubberStandard Temperatures forTestingD3182 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)3D4575 Tes
13、t Methods for Rubber DeteriorationReferenceand Alternative Method(s)for Determining Ozone Levelin Laboratory Test ChambersNOTE2Test Method D518 and Test Methods D3395 have beenincorporated into these test methods.They remain technically unchanged1These test methods are under the jurisdiction of ASTM
14、 Committee D11 onRubber and is the direct responsibility of Subcommittee D11.15 on DegradationTests.Current edition approved May 1,2012.Published May 2012.Originallyapproved in 1951.Last previous edition approved in 2007 as D1149 07.DOI:10.1520/D1149-07R12.2For referenced ASTM standards,visit the AS
15、TM 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 of this historical standard is referenced onwww.astm.org.Copyright ASTM Internatio
16、nal,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 and will be superseded by Test Methods D 1149.Please refer to TestMethod D1171 for Test Method D518 tests which are to be performedoutdoors.3.Summary of Test Methods3.1 There are two methods described:3.1.1 Method ADynamic Strain(formerly Test MethodsD3395):3.1.1.1 Method A,Procedure A1 Dynamic Tensile Elonga-tion(formerly Test Methods D3395 Method A)rectangulartest specimens are subjected to dynamic maximum amp
