Designation:D3314−02(Reapproved2021)StandardTestMethodforRubber—ChemicalAnalysisforPolystyreneBlocksInSBR(Styrene-ButadieneRubber)andStyrene-ReinforcedLatices1ThisstandardisissuedunderthefixeddesignationD3314;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1ThistestmethodcoversthedeterminationoflongpolystyreneblocksinSBRrubbersandstyrene-reinforcedlatices.1.2Percentblockstyrenecontentmaybedeterminedintherangefrom1to100%.1.3Thistestmethodisintendedforuseongel-freepolymers,butitmaybeusedonpolymerscontaininggel,ifithasbeenproventhatgeldoesnotinterfere.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeSection7.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D1076SpecificationforRubber—Concentrated,AmmoniaStabilized,Creamed,andCentrifugedNaturalLatexD1416TestMethodsforRubberfromSyntheticSources—ChemicalAnalysis(Withdrawn1996)3D4483PracticeforEvaluatingPrecisionforTestMethodStandardsintheRubberandCarbonBlackManufacturingIndustriesE145SpecificationforGravity-ConvectionandForced-VentilationOvens3.SummaryofTestMethod3.1Thetestmethodisbaseduponoxidativecleavageoftheethylenicbondsintheblockcopolymerbytreatinga1,2-dichlorobenzenesolutionofthepolymerwithtertiarybutylhydroperoxide(2-methyl-2-hydroperoxypropane)withos-miumtetroxidecatalyst.Thesaturatedport...
