【英文标准名称】:StandardTestMethodforMoistureAbsorptionPropertiesandEquilibriumConditioningofPolymerMatrixCompositeMaterials
【原文标准名称】:高聚物基体合成材料水分吸收性能和平衡条件的标准试验方法
【标准号】:ASTMD5229/D5229M-1992(2010)
【标准状态】:现行
【国别】:美国
【发布日期】:1992
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D30.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:conditioning;moistureabsorption;moisturedesorption;moisturediffusivity;moistureequilibrium;polymermatrixcompositematerials;Absorption;Composites--aerospacematerials/applications;Computerizedmaterialpropertydatabases;Conditioning;Equil
【摘要】:ProcedureAisdesignedtoproducemoisturediffusionmaterialpropertydatathatmaybeusedasfollows:TodetermineapproximateexposuretimesforcouponconditioninginProceduresB,C,orD;Asinputtomoisturepredictionanalysiscomputercodes;orFormakingqualitativedecisionsonmaterialselectionorperformanceunderenvironmentalexposuretovariousformsofmoisture.ProceduresB,C,andDaredesignedtoconditiontestcouponstoaspecifiedmoistureequilibriumstatepriortoothermaterialpropertytesting(includingbutnotlimitedtomechanicaltesting).AsingletestusingProcedureAprovidesthemoisturediffusivityconstant,Dz,andthemoistureequilibriumcontent,Mm,atthegivenmoistureexposurelevelandtemperature.MultipletestsatdifferingtemperaturesarerequiredtoestablishthedependenceofDzontemperature.MultipletestsatdifferingmoistureexposurelevelsarerequiredtoestablishthedependenceofMmonmoistureexposurelevel.Vapor-exposuretestingshallbeusedtoconditionthespecimenwhenthein-serviceenvironmentalconditionisavaporsuchashumidair.Immersioninaliquidbathshouldbeusedtosimulatevaporexposureonlywhenapparentabsorptionpropertiesaredesiredforqualitativepurposes.Propertiesdeterminedinthelattermannershallbereportedasapparentproperties.Note18212;FormanypolymermatrixcompositesthevolumepercentreinforcementcanbedeterminedbyoneofthematrixdigestionproceduresofTestMethodD3171,or,forcertainreinforcementmaterialssuchasglassandceramics,bythematrixburn-offtechniqueofTestMethodD2584.TestMethodsD2734describesthelimitationsanduseofthecalculationsrequiredtoapproximatethevoidcontentinthecomposite.ThevoidcontentequationsofTestMethodsD2734areapplicabletobothTestMethodsD2584andD3171.TestMethodsD792canbeusedtodeterminespecificgravity.1.1Thistestmethodcoversaprocedure(ProcedureA)forthedeterminationofmoistureabsorptionordesorptionpropertiesinthethrough-the-thicknessdirectionforsingle-phaseFickiansolidmaterialsinflatorcurvedpanelform.Alsocoveredareproceduresforconditioningtestcouponspriortouseinothertestmethods;eithertoequilibriuminanon-laboratoryenvironment(ProcedureB),toequilibriuminastandardlaboratoryatmosphereenvironment(ProcedureC),ortoanessentiallymoisture-freestate(ProcedureD).Whileintendedprimarilyforlaminatedpolymermatrixcompositematerials,theseproceduresarealsoapplicabletoothermaterialsthatsatisfytheassumptionsof1.2.1.2Thecalculationofthethrough-the-thicknessmoisturediffusivityconstantinProcedureAassumesasingle-phaseFickianmaterialwithconstantmoistureabsorptionpropertiesthroughthethicknessofthespecimen.Thevalidityoftheequationsused......
【中国标准分类号】:G31
【国际标准分类号】:83_140_20
【页数】:13P.;A4
【正文语种】:英语