astm-d-1148-2007版本

Designation:D1148–07aStandardTestMethodforRubberDeterioration—DiscolorationfromUltraviolet(UV)andHeatExposureofLight-ColoredSurfaces1ThisstandardisissuedunderthefixeddesignationD1148;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.(ThistestmethodwaspreparedjointlybytheSocietyofAutomotiveEngineersandASTMInternational.)1.Scope1.1Thistestmethodcoverstechniquestoevaluatethesurfacediscolorationofwhiteorlight-coloredvulcanizedrubberthatmayoccurwhensubjectedtoUVorUV/visibleexposurefromspecifiedsourcesundercontrolledconditionsofrelativehumidity,ormoisture,andtemperature.1.2Thistestmethodalsodescribeshowtoqualitativelyevaluatethedegreeofdiscolorationproducedundersuchconditions.1.3Theterm“discoloration”appliestoacolorchangeoftherubbersample,asdistinguishedfromstaining(seeNote1),thatreferstoacolorchangeofametalfinishincontactwithoradjacenttotherubberspecimen.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.NOTE1—TestsforstainingarecoveredbyTestMethodsD925.2.ReferencedDocuments2.1ASTMStandards:2D925TestMethodsforRubberProperty—StainingofSur-faces(Contact,Migration,andDiffusion)D2244PracticeforCalculationofColorTolerancesandColorDifferencesfromInstrumentallyMeasuredColorCoordinatesD3182PracticeforRubber—Materials,Equipment,andProceduresforMixingStandardCompoundsandPrepar-ingStandardVulcanizedSheetsD3183PracticeforRubber—PreparationofProductPiecesforTestPurposesfromProductsG151PracticeforExposingNonmetallicMaterialsinAc-celeratedTestDevicesthatUseLaboratoryLightSourcesG154PracticeforOperatingFluorescentLightApparatusforUVExposureofNonmetallicMaterialsG155PracticeforOperatingXenonArcLightApparatusforExposureofNon-MetallicMaterials3.SummaryofTestMethod3.1SpecimenstobetestedfordiscolorationareexposedtoUVorUV/visibleradiation.Thespecimensshallincludeoneormorecontrolspecimensofknowndiscolorationcharacter-istics.3.2Afterexposingthespecimenstoactinicradiationforspecifiedperiodsoftime,undercontrolledconditionsofrelativehumidity,ormoisture,andtemperature,thedegreeofdiscolorationisratedagainstdiscolorationofthecontrolspecimens,whichhavebeenexposedsimultaneouslywiththetestspecimens.4.SignificanceandUse4.1Thesurfaceofwhiteorlight-coloredvulcanizedrubberarticles,orvulcanizedrubbercoveredwithanorganicfinish,maydiscolorwhenexposedtoconditionsofhumidity,ormoisture,heat,andsunlight.Thischangeincoloroflight-coloredrubbersurfacesisobjectionabletotheconsumer.4.2Resultsobtainedshouldbetreatedonlyasindicatingtheeffectofirradiancefromthespecifiedsource(eitherUVA-340lampsoraxenonarcwithaDaylightFilter)andnotasequivalenttotheresultofanynaturalexposure,unlessthedegreeofquantitativecorrelationhasbeenempiricallyestab-lishedforthematerialinquestion.4.3Thistestmethodmaybeusedforproducer-consumeracceptance,refereepurposes,andresearchanddevelopmentwork.1ThistestmethodisunderthejurisdictionofASTMCommitteeD11onRubberandisthedirectresponsibilityofSubcommitteeD11.15onDegradationTests.CurrenteditionapprovedMay1,2007.PublishedJune2007.Originallyapprovedin1951.Lastpreviouseditionapprovedin2007asD1148–07.2ForreferencedASTMstandards,visittheASTMwebsite,@astm.org.ForAnnualBookofASTMStandardsvolumeinformation,refertothestandard’sDocumentSummarypageontheASTMwebsite.1Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.CopyrightASTMInternationalProvidedbyIHSunderlicensewithASTMLicensee=UniversityofTexasRevisedSubAccount/5620001114NotforResale,12/04/200705:24:19MSTNoreproductionornetworkingpermittedwithoutlicensefromIHS--`,``,``,````,,,`,,,,,,`,````,`-`-`,,`,,`,`,,`---5.Apparatus5.1FluorescentUV/CondensationApparatus(PracticeG154)—UseFluorescentUVtestapparatusthatconformstotherequirementsdefinedinPracticesG151andG154.5.1.1Unlessotherwisespecified,thespectralpowerdistri-bution(SPD)ofthefluorescentlampshallconformtotherequirementsofTable1inPracticeG154(UVA-340Lamp).RefertoFig.1.5.2XenonArcLightApparatus(PracticeG155)—UsexenonarctestapparatusthatconformstotherequirementsdefinedinPracticesG151andG155.5.2.1Unlessotherwisespecified,thespectralpowerdistri-bution(SPD)ofthefilteredxenonlampshallconformtotherequirementsofTable1inPracticeG155(XenonArcwithDaylightFilter).RefertoFig.2.5.3Colormetercapableofmeasuringtristimuluscolorsforamber,blue,andgreenwithorwithoutautomaticcalculationforLaborL*a*b*values.Ifwithoutautomaticcalculations,acomputerprogramshouldbeavailableforthiscalculation.6.TestSpecimen6.1Thetestspecimenshallbepreparedfromavulcanizedproductionpartorfromatestslabpreparedinaccordancewit