Designation:D814−95(Reapproved2020)StandardTestMethodforRubberProperty—VaporTransmissionofVolatileLiquids1ThisstandardisissuedunderthefixeddesignationD814;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthemeasurementoftherateofvaportransmissionofvolatileliquidsthrougharubbersheet,disk,ordiaphragm.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D3767PracticeforRubber—MeasurementofDimensions3.SignificanceandUse3.1Therateoftransmissionofaliquidthrougharubbersheet,thatactsasabarrier,isimportantinrubberdiaphragmperformanceandothersimilarindustrialapplications.Thistransmissionisreferredtoasvaportransmissionsincetheliquiddiffusesthroughtherubberinamolecularsenseandescapesintofreeatmosphereinvaporform.3.2Thistestmethodisapplicableonlytothematerialsinsheetformofmoderatethicknessandisprincipallyusefulforcomparingtherelativevaportransmissionofdifferentliquidsinthesamerubberorofthesameliquidthroughdifferentrubbers.Comparisonsshouldnotbemadeinwhichbothdifferentrubbersanddifferentliquidsareused.4.Apparatus4.1Thetestapparatusshallconsistessentiallyofglassvaportransmissionjars(4.2)foreachliquid,onwhichthetestspecimensaremounted,andasuitablerackforsupportingthejar...
