Designation:D2734−16StandardTestMethodsforVoidContentofReinforcedPlastics1ThisstandardisissuedunderthefixeddesignationD2734;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thesetestmethodscoverthevoidcontentofreinforcedplasticsor“composites.”Thetestmethodsareapplicabletocompositesforwhichtheeffectsofignitiononthematerialsareknown.Mostplastics,glass,andreinforcementsfallintothisclass.Thesetestmethodsarenotapplicabletocompositesforwhichtheeffectsofignitionontheplastics,thereinforcement,andanyfillersareunknown.Thisclassmayincludesiliconeresins,whichdonotburnoffcompletely,reinforcementsconsistingofmetals,organicmaterials,orinorganicmaterialswhichmaygainorloseweight,andfillersconsistingofoxides,carbonates,etc.,whichmaygainorloseweight.Notethatseparateweightlosstestsofindividualmaterialswillusually,butnotnecessarily,givethesameresultaswhenallthematerialsarecombined.NOTE1—ThereisnoknownISOequivalenttothesetestmethods.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D618PracticeforConditioningPlasticsforTestingD792TestMethodsforDensityandSpecificGravity(Rela-tiveDensity)ofPlasticsbyDisplacementD1505TestMethodforDensityofPlasticsbytheDensity-GradientTechniqueD2584TestMethodforIgnitionLossofCuredReinforcedResins3.SummaryofTestMethods3.1Thedensitiesoftheresin,thereinforcement,andthecompositesaremeasuredseparately.Thentheresincontentismeasuredandatheoreticalcompositedensitycalculated.Thisiscomparedtotheme...
