【英文标准名称】:StandardTestMethodforResponseofRigidCellularPlasticstoThermalandHumidAging
【原文标准名称】:刚性多孔塑料耐热、耐潮和耐老化性的试验方法
【标准号】:ASTMD2126-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:
【英文主题词】:dimensionalchange;dimensionalstability;humidaging;rigidcellularplastics;thermalaging;Acceleratedaging/testing--plastics;Dimensionalstability;Humidity--plastics;Rigidcellularplastics;Simulatedserviceconditioner;Thermalanalysis(T
【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.D1.1Thistestmethodcoversproceduresforthethermalandhumidexposureofrigidcellularplastics.Conditionsusedshallbeagreeduponbetweenthepurchaserandthesupplier.Note18212;AlistofcommonlyusedexposureconditionsisfoundinTable1.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesinparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note28212;ThistestmethodisequivalenttoISO2796inthesamplingandcalculationsections.ItisnotequivalenttoISO2796intheproceduresection.TABLE1TemperatureandRelativeHumidityConditionsTemperature,x00B0;C(x00B0;F)RelativeHumidity,%x2212;73x00B1;3(x2212;100x00B1;6)
ambient
x2212;40