ASTM D3012-2007 用炉内样品旋转器测定丙烯塑料的热氧化稳定性的标准试验方法
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【英文标准名称】:StandardTestMethodforThermal-OxidativeStabilityofPolypropyleneUsingaSpecimenRotatorWithinanOven
【原文标准名称】:用炉内样品旋转器测定丙烯塑料的热氧化稳定性的标准试验方法
【标准号】:ASTMD3012-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:D20.15
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:热学;氧化;塑料;丙烯;耐力;稳定性;测试
【英文主题词】:aging;biaxialrotator;polypropylene;thermalaging;thermaloxidativestability
【摘要】:Underthesevereconditionsofthistestmethod,thespecimensundergodegradationataratethatisdependentuponthethermalenduranceofthepolypropylenematerialunderexamination.Thethermallevelofthistestmethodisconsideredsufficientlyseveretocausefailureofcommercialgradesofheat-stablepolypropylenewithinareasonableperiodoftime.Ifdesired,lowertemperaturescanbeappliedtoestimatetheperformanceofpolypropylenematerialswithlowerheatstability.Thetechniqueofspecimenrotationdescribedinthistestmethodprovidesanestimateofthelife-temperaturerelationshipofpolypropylene.Ifthistestmethodisconductedatdifferenttemperaturesonthesamematerial,amorereliableestimateofthelife-temperaturerelationshipofpolypropyleneisdetermined.ThistestmethodcanbeconductedatseveraltemperaturesandthedatainterpretedthroughuseoftheArrheniusrelation,byplottingthelogarithmsoftimestofailureagainstthereciprocalsofthetemperaturesinkelvins(K).Temperaturesintherangefrom100to150x00B0;C,withintervalsof10x00B0;C,aresuggestedforthispurpose.Thestabilityasdeterminedundertheprescribedtestmethodisnotdirectlyrelatedtothesuitabilityofthecompoundforausewheredifferentconditionsprevail.Thespecimenrotationtechniqueofthermalagingincreasestheprobabilitythatallspecimenswillbeexposedsimilarlyandthattheeffectoftemperaturegradientsinanovenwillbeminimized.1.1Thistestmethodprovidesameansforestimatingtheresistanceofpolypropylene,inmoldedform,toacceleratedagingbyheatinthepresenceofairusingaforceddraftoven.1.2Thestabilitydeterminedbythistestmethodisnotdirectlyrelatedtothesuitabilityofthematerialforusewhendifferentenvironmentalconditionsprevailandshallnotbeusedtopredictperformance.Note1Thespecifiedthermallevelsinthistestmethodareconsideredsufficientlyseveretocausefailureofcommercialgradesofheat-stablepolypropylenewithinareasonableperiodoftime.Ifdesired,lowertemperaturescanbeappliedtoestimatetheperformanceofpolypropylenewithlowerheatstabilities.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesinbracketsareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note2ThistestmethodandISO4577-1983aretechnicallysimilarbutdifferentinpreparationoftestspecimens,thicknessoftestspecimen,measurementofthenumberofairflowchangesintheovens,andthenumberofairchangesperhourrequired.1.4Thepurposeofthisappendixistoprovideasecondarymethodfordeterminingthenumberofairexchangesthatoccurwithintheforceddraftovenusedformeasurementofthermaloxidativestability.
【中国标准分类号】:G31
【国际标准分类号】:83_080_20
【页数】:6P.;A4
【正文语种】:
【原文标准名称】:用炉内样品旋转器测定丙烯塑料的热氧化稳定性的标准试验方法
【标准号】:ASTMD3012-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:D20.15
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:热学;氧化;塑料;丙烯;耐力;稳定性;测试
【英文主题词】:aging;biaxialrotator;polypropylene;thermalaging;thermaloxidativestability
【摘要】:Underthesevereconditionsofthistestmethod,thespecimensundergodegradationataratethatisdependentuponthethermalenduranceofthepolypropylenematerialunderexamination.Thethermallevelofthistestmethodisconsideredsufficientlyseveretocausefailureofcommercialgradesofheat-stablepolypropylenewithinareasonableperiodoftime.Ifdesired,lowertemperaturescanbeappliedtoestimatetheperformanceofpolypropylenematerialswithlowerheatstability.Thetechniqueofspecimenrotationdescribedinthistestmethodprovidesanestimateofthelife-temperaturerelationshipofpolypropylene.Ifthistestmethodisconductedatdifferenttemperaturesonthesamematerial,amorereliableestimateofthelife-temperaturerelationshipofpolypropyleneisdetermined.ThistestmethodcanbeconductedatseveraltemperaturesandthedatainterpretedthroughuseoftheArrheniusrelation,byplottingthelogarithmsoftimestofailureagainstthereciprocalsofthetemperaturesinkelvins(K).Temperaturesintherangefrom100to150x00B0;C,withintervalsof10x00B0;C,aresuggestedforthispurpose.Thestabilityasdeterminedundertheprescribedtestmethodisnotdirectlyrelatedtothesuitabilityofthecompoundforausewheredifferentconditionsprevail.Thespecimenrotationtechniqueofthermalagingincreasestheprobabilitythatallspecimenswillbeexposedsimilarlyandthattheeffectoftemperaturegradientsinanovenwillbeminimized.1.1Thistestmethodprovidesameansforestimatingtheresistanceofpolypropylene,inmoldedform,toacceleratedagingbyheatinthepresenceofairusingaforceddraftoven.1.2Thestabilitydeterminedbythistestmethodisnotdirectlyrelatedtothesuitabilityofthematerialforusewhendifferentenvironmentalconditionsprevailandshallnotbeusedtopredictperformance.Note1Thespecifiedthermallevelsinthistestmethodareconsideredsufficientlyseveretocausefailureofcommercialgradesofheat-stablepolypropylenewithinareasonableperiodoftime.Ifdesired,lowertemperaturescanbeappliedtoestimatetheperformanceofpolypropylenewithlowerheatstabilities.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesinbracketsareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note2ThistestmethodandISO4577-1983aretechnicallysimilarbutdifferentinpreparationoftestspecimens,thicknessoftestspecimen,measurementofthenumberofairflowchangesintheovens,andthenumberofairchangesperhourrequired.1.4Thepurposeofthisappendixistoprovideasecondarymethodfordeterminingthenumberofairexchangesthatoccurwithintheforceddraftovenusedformeasurementofthermaloxidativestability.
【中国标准分类号】:G31
【国际标准分类号】:83_080_20
【页数】:6P.;A4
【正文语种】:
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