【英文标准名称】:Plastics-Determinationofwaterabsorption(ISO62:2008);GermanversionENISO62:2008
【原文标准名称】:塑料.吸水性测定
【标准号】:DINENISO62-2008
【标准状态】:现行
【国别】:德国
【发布日期】:2008-05
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:吸收;吸收能力(波);测定;测量规程;湿度;潮气;塑料;水量;试件;测试;水;吸水率
【英文主题词】:Absorption;Absorptivity;Determination;Determinationprocedures;Humidity;Moisture;Plastics;Quantityofwater;Testpieces;Testing;Water;Waterabsorption
【摘要】:1.1ThisInternationalStandarddescribesaprocedurefordeterminingthemoistureabsorptionpropertiesinthe"through-the-thickness"directionofflatorcurved-formsolidplastics.ThisInternationalStandardalsodescribesproceduresfordeterminingtheamountofwaterabsorbedbyplasticspecimensofdefineddimensions,whenimmersedinwaterorwhensubjectedtohumidairundercontrolledconditions.The"through-the-thickness"moisturediffusioncoefficientcanbedeterminedforsingle-phasematerialbyassumingFickiandiffusionbehaviourwithconstantmoistureabsorptionpropertiesthroughthethicknessofthetestspecimen.Thismodelisvalidforhomogeneousmaterialsandforreinforcedpolymer-matrixcompositestestedbelowtheirglasstransitiontemperature.However,sometwo-phasematricessuchashardenedepoxiesmayrequireamulti-phaseabsorptionmodelwhichisnotcoveredbythisInternationalStandard.1.2Ideally,thebestcomparisonofthewaterabsorptionpropertiesand/ordiffusioncoefficientsofmaterialsshouldbecarriedoutonlyusingtheequilibriummoisturecontentofplasticsexposedtoidenticalconditions.Thecomparisonofmaterialsusingpropertiesatmoistureequilibriumdoesnotassume,andisthereforenotlimitedto,single-phaseFickiandiffusionbehaviour.1.3Alternatively,waterabsorptionofplasticspecimensofdefineddimensionsexposedtoimmersionorhumidityundercontrolledconditionsbutforanarbitrarytimeperiodcanbeusedtocomparedifferentbatchesofthesamematerialorforqualitycontroltestsofagivenmaterial.Forthistypeofcomparison,itisessentialthatalltestspecimensbeofidenticaldimensionsand,asnearlyaspossible,havethesamephysicalattributes,e.g.surfacesmoothness,internalstresses,etc.However,moistureequilibriumisnotreachedundertheseconditions.Therefore,resultsfromthistypeoftestcannotbeusedtocomparethewaterabsorptionpropertiesofdifferenttypesofplastics.Formorereliableresults,simultaneoustestsarerecommended.1.4TheresultsobtainedusingthemethodsdescribedinthisInternationalStandardareapplicabletomostplasticsbutarenotapplicabletocellularplastics,granulatesorpowders,whichcanshowadditionalabsorptionandcapillaryeffects.Plasticsexposedtomoistureundercontrolledconditionsfordefinedperiodsoftimeproviderelativecomparisonsbetweenthem.Thetestsdescribedforthedeterminationofthediffusioncoefficientmaynotbeapplicabletoallplastics.Plasticsthatdonotretaintheirshapewhenimmersedinboilingwatershouldnotbecomparedusingmethod2(see6.4).
【中国标准分类号】:G31
【国际标准分类号】:83_080_01
【页数】:20P.;A4
【正文语种】:德语


【英文标准名称】:StandardTestMethodforSodiuminResidualFuelOil(FlamePhotometricMethod)
【原文标准名称】:测定残留燃料油中钠的标准试验方法(火焰光度测定法)
【标准号】:ASTMD1318-2000(2005)
【标准状态】:现行
【国别】:
【发布日期】:2000
【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】:D02.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:Excessiveamountsofsodiumcanindicatethepresenceofmaterialsthatcausehighwearofburnerpumpsandvalves,andcontributetodepositsofboilerheatingsurfaces.1.1Thistestmethodcoversthedeterminationofsodiuminresidualfueloilbymeansofaflamephotometer.Itsprecisioninlowrangeslimitsitsapplicationtosamplescontainingmorethan15mg/kgsodium.Otherelementscommonlyfoundinresidualfueloildonotinterfere.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyproblemsassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecifichazardstatementssee6.3,6.5,6.7,8.2,andNote3.
【中国标准分类号】:Z29
【国际标准分类号】:75_160_20
【页数】:3P.;A4
【正文语种】: