【英文标准名称】:StandardTestMethodforKineticParametersbyDifferentialScanningCalorimetryUsingIsothermalMethods
【原文标准名称】:用等温法的差示扫描量热法测定动力系数的标准试验
【标准号】:ASTME2070-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:E37.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:activationenergy;autocatalyticreactions;crystallizationreactions;differentialscanningcalorimetry(DSC);frequencyfactor;kinetics;nthorderreactions;pre-exponentialfactor;reactions;thermalanalysis;thermosetcu
【摘要】:Thistestmethodisusefulforresearchanddevelopment,qualityassurance,regulatorycomplianceandspecificationacceptancepurposes.Thedeterminationoftheorderofachemicalreactionortransformationatspecifictemperaturesortimeconditionsisbeyondthescopeofthistestmethod.TheactivationenergyresultsobtainedbythismethodmaybecomparedwiththoseobtainedfromTestMethodE698fornthorderandautocatalyticreactions.Activationenergy,pre-exponentialfactorandreactionorderresultsbythismethodmaybecomparedtothoseforTestMethodE2041fornthorderreactions.1.1TestMethodAdetermineskineticparametersforactivationenergy,pre-exponentialfactorandreactionorderusingdifferentialscanningcalorimetryfromaseriesofisothermalexperimentsoverasmall(8764;10K)temperaturerange.Thistreatmentisapplicabletolownthorderreactionsandtoautocatalyzedreactionssuchasthermosetcuringorpyrotechnicreactionsandcrystallizationtransformationsinthetemperaturerangefrom300to900K(30to630x00B0;C).Thistestmethodisapplicableonlytothesetypesofexothermicreactionswhenthethermalcurvesdonotexhibitshoulders,discontinuitiesorshiftsinbaseline.1.2TestMethodBalsodeterminestheactivationenergyofasetoftime-to-eventandisothermaltemperaturedatageneratedbythisorotherprocedures.1.3TestMethodCdeterminestheactivationenergyandinitialheatflowfromaseriesofisothermalexperimentsoverasmalltemperaturerange.Becausethisapproachonlydetermineskineticparameterofactivationenergy,noknowledgeofthekineticmodelisrequired.Thereforeitisconsideredtobex201C;modelfreex201D;.Thisapproachisbroadlyapplicabletoavarietyofcomplicatedreactionsincludingthosenotwellunderstood.1.4SIunitsarethestandard.1.5ThistestmethodissimilarbutnotequivalenttoISO11357,Part5,andprovidesmoreinformationthantheISOstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SpecificprecautionarystatementsaregiveninSection8.
【中国标准分类号】:A54
【国际标准分类号】:17_200_10
【页数】:11P.;A4
【正文语种】:英语