【英文标准名称】:StandardTestMethodforAssignmentofaGlassTransitionTemperatureUsingThermomechanicalAnalysis:TensionMethod
【原文标准名称】:拉力下热机械分析的玻璃转变温度分配的标准试验方法:张力法
【标准号】:ASTME1824-2009e1
【标准状态】:现行
【国别】:
【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】:E37.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:玻璃化转变;玻璃化转变湿度;拉伸模式;热机分析(TMA);热膨胀测量法
【英文主题词】:glasstransition;glasstransitiontemperature;tensilemode;thermomechanicalanalysis(TMA);thermodilatometry
【摘要】:Theglasstransitionisdependentonthethermalhistory,softeningagentsoradditivesofthematerialtobetested.Foramorphousandsemicrystallinematerialstheassignmentofaglasstransitiontemperaturemayleadtoimportantinformationaboutthermalhistory,processingconditions,stability,progressofchemicalreactions,andmechanicalandelectricalbehavior.Thermomechanicalanalysisprovidesarapidmeansofdetectingchangesinhardnessorlineardimensionalchangeassociatedwiththeglasstransition.DimensionalchangesmeasuredasaspecimenisheatedovertheTgregionmayincludetheinteractionofseveraleffects:anincreaseinthecoefficientofexpansion,adecreaseinthemodulus,whichunderaconstantstressleadstoincreasedextension,stressreliefleadingtoirreversibledimensionalchange(shrinkageinonedimension,expansioninanotherdimension),andphysicalagingeffectswhichchangethekineticsofthedimensionalchange.Thistestmethodisusefulforresearchanddevelopment,qualitycontrol,andspecificationacceptancetesting;particularlyoffilmsandfibers.1.1Thistestmethodcoversaprocedurefortheassignmentofaglasstransitiontemperatureofmaterialsonheatingusingthermomechanicalmeasurements.1.2ThistestmethodmaybeusedasacomplementtoTestMethodE1545andisapplicabletoamorphousortopartiallycrystallinematerialsintheformoffilms,fibers,wires,etc.thataresufficientlyrigidtoinhibitextensionduringloadingatambienttemperature.1.3Thegenerallyapplicabletemperaturerangeforthistestmethodisx2212;100to600x00B0;C.Thistemperaturerangemaybealtereddependingupontheinstrumentationused.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5ThereisnoISOmethodequivalenttothismethod.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q30
【国际标准分类号】:81_040_01
【页数】:4P.;A4
【正文语种】: