作者:标准资料网 时间:2024-05-10 08:27:25   浏览:9970   来源:标准资料网

【英文标准名称】:StandardTestMethodforAssignmentoftheGlassTransitionTemperatureByDynamicMechanicalAnalysis
【原文标准名称】:用动态力学分析测定玻璃转变温度的标准试验方法
【标准号】:ASTME1640-2009
【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】:E37.10
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:dynamicmechanicalanalysis;elasticmodulus;glasstransition;modulus;storagemodulus;temperature;thermalanalysis;Dynamicmechanicalanalysis(DMA);Elasticmodulus;Glasstransition(Tg)temperature;Modulus;Partiallycrystal
【摘要】:Thistestmethodcanbeusedtolocatetheglasstransitionregionandassignaglasstransitiontemperatureofamorphousandsemi-crystallinematerials.Dynamicmechanicalanalyzersmonitorchangesintheviscoelasticpropertiesofamaterialasafunctionoftemperatureandfrequency,providingameanstoquantifythesechanges.Inidealcases,thetemperatureoftheonsetofthedecreaseinstoragemodulusmarkstheglasstransition.Aglasstransitiontemperature(Tg)isusefulincharacterizingmanyimportantphysicalattributesofthermoplastic,thermosets,andsemi-crystallinematerialsincludingtheirthermalhistory,processingconditions,physicalstability,progressofchemicalreactions,degreeofcure,andbothmechanicalandelectricalbehavior.Tgmaybedeterminedbyavarietyoftechniquesandmayvaryinaccordancewiththetechnique.Thistestmethodisusefulforqualitycontrol,specificationacceptance,andresearch.1.1Thistestmethodcoverstheassignmentofaglasstransitiontemperature(Tg)ofmaterialsusingdynamicmechanicalanalyzers.1.2Thistestmethodisapplicabletothermoplasticpolymers,thermosetpolymers,andpartiallycrystallinematerialswhicharethermallystableintheglasstransitionregion.1.3Theapplicablerangeoftemperaturesforthistestmethodisdependentupontheinstrumentationused,but,inordertoencompassallmaterials,theminimumtemperatureshouldbeaboutx2212;150x00B0;C.1.4Thistestmethodisintendedformaterialshavinganelasticmodulusintherangeof0.5MPato100GPa.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6ThisstandardissimilartoIEC61006exceptthatstandardusesthepeaktemperatureofthelossmoduluspeakastheglasstransitiontemperaturewhilethisstandardusestheextrapolatedonsettemperatureofthestoragemoduluschange.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q33
【国际标准分类号】:81_040_10
【页数】:6P.;A4
【正文语种】:英语