Designation:D4875−18StandardTestMethodsofPolyurethaneRawMaterials:DeterminationofthePolymerizedEthyleneOxideContentofPolyetherPolyols1ThisstandardisissuedunderthefixeddesignationD4875;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1TestMethodA—ProtonNuclearMagneticResonanceSpectroscopy(1HNMR)measurespolymerizedethyleneoxide(EO)contentofethyleneoxide(EO)propyleneoxide(PO)polyetherpolyolsusedinflexiblepolyurethanefoamsandnon-foams.ItissuitablefordiolsinitiatedfromglycolsofEOorPOcontainingEOpercentages>5.Fortriolsinitiatedwithglycerol(glycerin)andtrimethylolpropane,anuncorrectedEOvalueisobtainedsincebothinitiatorshaveprotonsthatcontributetotheEOmeasurement.1.2TestMethodB—Carbon-13NuclearMagneticReso-nanceSpectroscopy(13CNMR)measuresthepolymerizedEOcontentofEO-POpolyetherpolyolsusedinflexiblepolyure-thanefoamsandnon-foams.ItissuitablefordiolsandtriolsmadefromthecommonlyusedinitiatorsandcontainingEOpercentages>5.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.NOTE1—ThereisnoknownISOequivalenttothisstandard.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D883TerminologyRelatingtoPlasticsE691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethodE2977PracticeforMeasuringandReportingPerformanceofFour...
