Designation:D3529−16(Reapproved2021)StandardTestMethodsforConstituentContentofCompositePrepreg1ThisstandardisissuedunderthefixeddesignationD3529;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thistestmethodcoversthedeterminationofthefibercontent,fiberarealweight,matrixsolidscontentandmatrixcontentofcompositematerialprepregs.Optionally,thematrixsolidscontentcanalsobedeterminedafteravolatilescontenthasbeenestablished.Volatilescontent,ifappropriateandrequired,isdeterminedbymeansofTestMethodD3530.1.2ProcedureAofthistestmethodappliestocompositeprepregofprimarilythermosettingmatricesthatcanbeex-tractedinorganicsolvent.Thereinforcementandfillermustbesubstantiallyinsolubleintheselectedextractionreagent.Thisproceduremayalsobeusedforthesamepurposestoextractothermatrixmaterialtypes.1.3ProcedureBofthistestmethodusesignitionlossofacompositeprepregmatrixandappliestoorganicmatrixcom-positesystemscontainingreinforcingfibersthatdonotchangemasswhenexposedtothematrixcombustionmethod.1.4Thistestmethodassumesatwo-partmaterialsystem(plusvolatiles)anddoesnotdistinguishbetweenhybridreinforcementsormatrices.Usewithhybridcompositesislimitedtodeterminationoftotalreinforcementortotalmatrixcontent.1.5MatrixsolidsdeterminationforProceduresAorBusesTestMethodD3530todeterminevolatilescontent.1.6AlternatetechniquesfordeterminingconstituentcontentincludeTestMethodsC613(resincontentbySoxhletextrac-tion)andD3171(usedprincipallyforconsolidatedlaminates).1.7ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.8Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafet...
