ASTM D2126-2004 硬质泡沫塑料对加热老化和受潮老化敏感性的标准试验方法

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【英文标准名称】:StandardTestMethodforResponseofRigidCellularPlasticstoThermalandHumidAging
【原文标准名称】:硬质泡沫塑料对加热老化和受潮老化敏感性的标准试验方法
【标准号】:ASTMD2126-2004
【标准状态】:现行
【国别】:
【发布日期】:2004
【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】:D20.22
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:热学;灵敏度;潮气;纸浆;老化;试验;塑料
【英文主题词】:dimensionalchange;dimensionalstability;humidaging;rigidcellularplastics;thermalaging
【摘要】:Becauseofthewidevarietyofpotentialusesofrigidcellularplastics,artificialexposuretoestimatetheeffectivebehaviorofthesematerialsmustbebased,toagreatextent,ontheintendedapplication.Towardthisend,thistestmethodisintendedtorecommendavarietyofconditionsfromwhichoneormoreofthedesiredexposureconditionscanbeselected.(Note3)Theconditionsrecommendedinthistestmethodhavebeenwidelyusedinartificiallyexposingrigidcellularplasticsandindeterminingtheeffectsofvarioustemperaturesandhumiditiesonthesematerials.Finaltestmeasurementsaredeterminedafterthespecimensreturntoroomtemperature.Wherespecified,thespecimenswillbetestedattheexposurecondition,butmustbereportedassuch.Dimensionalchangesmeasuredbythistestmethodcanbeusedtocomparetheperformanceofmaterialsinaparticularenvironment,toassesstherelativestabilityoftwoormorecellularplastics,ortospecifyanacceptancecriterionforaparticularmaterial.Theresultsofthistestmethodarenotsuitableforpredictingend-useproductperformanceorcharacteristics,noraretheyadequateforengineeringordesigncalculations.Note38212;Wherethermalshockisknownorsuspectedtooccurduetorapidheatingto(orcoolingfrom)aparticulartemperature,guidanceonthepermissibleheatingorcoolingrates,orboth,shallbeobtainedfromthemanufacturerofthematerialconcerned.Note48212;Thedimensionalchangeofaspecimencanvarydependingupontheageofthesampleorthelengthoftimebetweenspecimenpreparationandthebeginningofthetest,orboth.Beforeproceedingwiththistestmethod,referenceshallbemadetothespecificationofthematerialbeingtested.Anytestspecimenpreparation,conditioning,dimensions,ortestingparameterscoveredinthematerialsspecification,orcombinationthereof,shalltakeprecedenceoverthosementionedinthistestmethod.Iftherearenospecifications,thenthedefaultconditionsapply.1.1Thistestmethodcoversproceduresforthethermalandhumidexposureofrigidcellularplastics.Conditionsusedshallbeagreeduponbetweenthepurchaserandthesupplier.Note1Alistofcommonlyusedexposureconditionscanbefoundin.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesinbracketsareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note2ThistestmethodresemblesISO2796intitleonly.Thecontentissignificantlydifferent.ThistestmethodisequivalenttoISO2796inthesamplingandcalculationsections.ItisnotequivalenttoISO2796intheproceduresection.
【中国标准分类号】:G31
【国际标准分类号】:83_100
【页数】:3P.;A4
【正文语种】: