Designation:D4591−07(Reapproved2012)StandardTestMethodforDeterminingTemperaturesandHeatsofTransitionsofFluoropolymersbyDifferentialScanningCalorimetry1ThisstandardisissuedunderthefixeddesignationD4591;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thistestmethoddefinesconditionsfortheuseofdifferentialscanningcalorimetry(DSC)withfluoropolymers.ItcoverstheuseofDSCanalyseswiththefluoropolymers,PTFE,PVDF,PCTFE,andPVFandtheircopolymersPFA,MFA,FEP,ECTFE,EFEP,VDF/HFP,VDF/TFE/HFP,VDF/CTFE.Thetestmethodisapplicabletotheanalysisofpowdersaswellassamplestakenfromsemi-finishedorfinishedproducts.ThenatureoffluoropolymersissuchthatspecialproceduresareneededforrunningDSCanalysisandinterpret-ingtheresults.1.2ThevaluesstatedinSIunitsasdetailedinIEEE/ASTMSI-10aretoberegardedasthestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.NOTE1—ThereiscurrentlynoISOstandardthatduplicatesthistestmethod.ISO12086-1andISO12086-2coversimilartestingandreferencethistestmethodfortestingconditions.2.ReferencedDocuments2.1ASTMStandards:2D1600TerminologyforAbbreviatedTermsRelatingtoPlas-ticsD3418TestMethodforTransitionTemperaturesandEn-thalpiesofFusionandCrystallizationofPolymersbyDifferentialScanningCalorimetryD4894SpecificationforPolytetrafluoroethylene(PTFE)GranularMoldingandRamExtrusionMaterialsD4895SpecificationforPolytetrafluoroethylene(PTFE)ResinProducedFromDispersionE473TerminologyRelatingtoThermalAnalysisandRhe-ologyE793TestMethodforEnthalpiesofFusionandCrystalliza-tionbyDifferentialScanningCalorimetryIEEE/AS...
