Designation:D6049−03(Reapproved2022)StandardTestMethodforRubberProperty—MeasurementoftheViscousandElasticBehaviorofUnvulcanizedRawRubbersandRubberCompoundsbyCompressionBetweenParallelPlates1ThisstandardisissuedunderthefixeddesignationD6049;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1ThistestmethodisanadaptationoftheGermanStandardDIN53514,afurtherdevelopmentoftheformer“DefoTest”(seeAppendixX1).1.2Thistestmethodiscapableofmeasuringandcharacter-izingtherheologicalbehavior(viscosityandelasticity)ofunvulcanizedrawrubbersandrubbercompounds,relatingtothemacrostructureofrubberpolymers(averagemolecularweight,molecularweightdistribution,longchainbranching,andmicro-andmacro-gel).1.3Theviscosityandelasticityofunvulcanizedrubbersandrubbercompoundsaredeterminedbysubjectingcylindricaltestpiecestoacompression/recoverycycle.Thedependencyonshearrateatconstantshearstressisevaluatedandthematerialfatiguebehaviorisdeterminedinrepeatcycletesting.1.4Thenon-Newtonianviscousandelasticbehaviorofrubbersandrubbercompoundscanalsobeevaluated.1.5Statisticalevaluationofthetestdataprovidesanindi-cationofdatavariation,whichmaybeemployedasanestimateofthehomogeneityofthematerialtested.1.6ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesinparenthesesareforinformationonly.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.8Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganization...
