Designation:D7131−09StandardTestMethodforDeterminationofIonExchangeCapacity(IEC)inGraftedBatterySeparator1ThisstandardisissuedunderthefixeddesignationD7131;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodevaluatesanimportantcharacteristicofpolyolefinorotherfibrousnonwovensheetmaterialintendedforuseinalkalinebatteryseparatorapplications.Thehydro-philicpropertiesofthematerialareenhancedbygraftingafunctionalgroupontothepolyolefin,andthistestmethodistheprimarytestmethodtodeterminethetreatmentlevel,thatis,levelofmonomergraftedtothebasepolymer.Thistestmethodcanalsobeusedforfilmormembranes1.2Thistestmethodisintendedprimarilyfortestingcopolymer-graftedpolyolefinmaterialsusedasbatteryseparators,butcouldbeusedforanygraftedmaterial.Theseseparatorshaveradiation-initiatedgraftingofacrylicacidmonomer(forexample)ontoapolyolefinbase-webmaterialtogeneratehydrophilicsitesonthematerial.Thisprocessisamethodforsurfacemodificationofpolymermaterials,andisusedtomakeseparatorshydrophilic.Graftingcanbeaccom-plishedbyirradiationoncommonpolymerssuchaspolyethylene,polypropyleneandfluoropolymerswithvariousformsofenergy,suchasUV,gammarays,electronbeams(EB)orX-rays..1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesandtodeterminetheapplicabilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D123TerminologyRelatingtoTextilesD1711TerminologyRelatingtoElectricalInsulationE438SpecificationforGlassesinLaboratoryApparatusE1272SpecificationforLaboratoryGlassGraduatedCylin-ders3.Terminology3.1Definitions:3.1.1Fordefin...
