ASTM D7238-2006 荧光紫外冷凝装置对未增强聚烯烃土薄膜曝光作用的标准试验方法
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【英文标准名称】:StandardTestMethodforEffectofExposureofUnreinforcedPolyolefinGeomembraneUsingFluorescentUVCondensationApparatus
【原文标准名称】:荧光紫外冷凝装置对未增强聚烯烃土薄膜曝光作用的标准试验方法
【标准号】:ASTMD7238-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【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】:D35.02
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:装置;冷凝;影响;暴露;荧光的;土工膜;聚烯烃;试验;未增强的;紫外的
【英文主题词】:accelerated;geomembrane;fluorescentUV;temperature;ultraviolet
【摘要】:Theuseofthisapparatusisintendedtoinducepropertychangesassociatedwiththeenduseconditions,includingtheeffectsoftheUVportionofsunlight,moisture,andheat.Exposuresarenotintendedtosimulatethedeteriorationcausedbylocalizedweatherphenomena,suchasatmosphericpollution,biologicalattack,andsaltwaterexposure.Note38212;RefertoPracticeG151forcautionaryguidanceapplicabletolaboratoryweatheringdevices.Variationinresultsmaybeexpectedwhenoperatingconditionsarevariedwithintheacceptedlimitsofthismethod.Testdataforonethicknessofageomembranecannotbeusedasdataforotherthicknessgeomembranesmadewiththesameformula(polymer,pigmentandstabilizers)sincethedegradationisthicknessrelated.Note48212;Itisrecommendedthatasimilarmaterialofknownperformance(acontrol)beexposedsimultaneouslywiththetestmaterialtoprovideastandardforcomparativepurposes.Whencontrolmaterialisusedinthetestprogram,itisrecommendedonlyonecouponbeusedforeachUVexposureperiodtoallowforOITtesting.1.1ThisstandardcoversthespecificproceduresandtestconditionsthatareapplicableforexposureofunreinforcedpolyolefingeomembranestofluorescentUVradiationandcondensation.Note1Polyolefingeomembranesincludehighdensitypolyethylene(HDPE),linearlowdensitypolyethylene(LLDPE),flexiblepolyproplyene(fPP),etc.1.2TestspecimensareexposedtofluorescentUVA340lampsundercontrolledenvironmentalconditions.UVA340lampsarestandardforthismethod.Note2OthertypesoffluorescentUVlamps,suchasUVB-313,canalsobeusedbasedupondiscussionbetweeninvolvedparties.However,ifthetestisranwithanothertypeoffluorescentUVlamps,suchasUVB-313,thisshouldbeconsideredasadeviationfromthestandardandclearlystatedinthetestreport.UVB-313andUVA-340fluorescentlampsgeneratedifferentamountofradiantpowerindifferentwavelengthranges;thus,thephotochemicaleffectscausedbythesedifferentlampsmayvary.1.3ThismethodcoverstheconditionsunderwhichtheexposureistobeperformedandthetestmethodsforevaluatingtheeffectsoffluorescentUV,heatandmoistureintheformofcondensationongeomembranes.GeneralguidanceisgiveninPracticesG151andG154.1.4ThevalueslistedinSIunitsaretoberegardedasthestandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:W59
【国际标准分类号】:59_080_70
【页数】:3P.;A4
【正文语种】:
【原文标准名称】:荧光紫外冷凝装置对未增强聚烯烃土薄膜曝光作用的标准试验方法
【标准号】:ASTMD7238-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【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】:D35.02
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:装置;冷凝;影响;暴露;荧光的;土工膜;聚烯烃;试验;未增强的;紫外的
【英文主题词】:accelerated;geomembrane;fluorescentUV;temperature;ultraviolet
【摘要】:Theuseofthisapparatusisintendedtoinducepropertychangesassociatedwiththeenduseconditions,includingtheeffectsoftheUVportionofsunlight,moisture,andheat.Exposuresarenotintendedtosimulatethedeteriorationcausedbylocalizedweatherphenomena,suchasatmosphericpollution,biologicalattack,andsaltwaterexposure.Note38212;RefertoPracticeG151forcautionaryguidanceapplicabletolaboratoryweatheringdevices.Variationinresultsmaybeexpectedwhenoperatingconditionsarevariedwithintheacceptedlimitsofthismethod.Testdataforonethicknessofageomembranecannotbeusedasdataforotherthicknessgeomembranesmadewiththesameformula(polymer,pigmentandstabilizers)sincethedegradationisthicknessrelated.Note48212;Itisrecommendedthatasimilarmaterialofknownperformance(acontrol)beexposedsimultaneouslywiththetestmaterialtoprovideastandardforcomparativepurposes.Whencontrolmaterialisusedinthetestprogram,itisrecommendedonlyonecouponbeusedforeachUVexposureperiodtoallowforOITtesting.1.1ThisstandardcoversthespecificproceduresandtestconditionsthatareapplicableforexposureofunreinforcedpolyolefingeomembranestofluorescentUVradiationandcondensation.Note1Polyolefingeomembranesincludehighdensitypolyethylene(HDPE),linearlowdensitypolyethylene(LLDPE),flexiblepolyproplyene(fPP),etc.1.2TestspecimensareexposedtofluorescentUVA340lampsundercontrolledenvironmentalconditions.UVA340lampsarestandardforthismethod.Note2OthertypesoffluorescentUVlamps,suchasUVB-313,canalsobeusedbasedupondiscussionbetweeninvolvedparties.However,ifthetestisranwithanothertypeoffluorescentUVlamps,suchasUVB-313,thisshouldbeconsideredasadeviationfromthestandardandclearlystatedinthetestreport.UVB-313andUVA-340fluorescentlampsgeneratedifferentamountofradiantpowerindifferentwavelengthranges;thus,thephotochemicaleffectscausedbythesedifferentlampsmayvary.1.3ThismethodcoverstheconditionsunderwhichtheexposureistobeperformedandthetestmethodsforevaluatingtheeffectsoffluorescentUV,heatandmoistureintheformofcondensationongeomembranes.GeneralguidanceisgiveninPracticesG151andG154.1.4ThevalueslistedinSIunitsaretoberegardedasthestandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:W59
【国际标准分类号】:59_080_70
【页数】:3P.;A4
【正文语种】:
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