~~Designation:D2117-82(Reapproved1988)E1StandardTestMethodforReprintedfromtheAnnualBookolASTMStandan:ls.CopyrightASTMIInotlistedinthecurrentcombinedindex,willeppearinthenextedition.MeltingPointofSemicrystallinePolymersbytheHotStageMicroscopyMethod1ThisstandardisissuedunderthefixeddesignationD21I7;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asupmcriptepsilon(E)indicatesaneditorialchangesincethelastrevisionorreapproval.ThistenmethodhasbeenapprovedforusebyagenciesoftheDepartmentofDefenseandforlistingintheDoDIndexofSpecificationsandStandards.uNoTE-ThesafetyhazardscaveatwasaddededitoriallytotheScopeandSections3throughSwererenumberedinMarch1988.1.ScopeI.IThistestmethodcoversthedetenninationofthemeltingpointofsemicrystallinepolymers(Note1).NOTEI-AnotherprocedureforthemeltingpointofnylonresinsmaybefoundinSpecificationD789.1.2Thistestmethodisapplicabletosemicrystallinepolymersingranularorsheetform,0.04mm(1.6mils)orlessinthickness.Thenormaloperatingtemperaturerangeis30to230°C.Amaximumoperatingtemperatureof350°Ccanbeobtainedwithspecialequipment(see7.2).1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesinparenthesesaregivenforinforma-tiononly.1.4Thisstandardmayinvolvehazardousmaterials,oper-ations,andequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyproblemsassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:D618MethodsofConditioningPlasticsandElectricalInsulatingMaterialsforTesting2D789SpecificationforNylonInjectionMoldingandExtrusionMaterials2D1898PracticeforSamplingofPlastics3E77MethodforVerificationandCalibrationofLiquid-in-GlassThermometers43.Terminology3.1semicrystallinepolymers-thosepolymerscapableofformingatleasttwo-dimensionalintermolecularorderaspreparedo...
