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【英文标准名称】:StandardPracticeforRubberConditioningForLowTemperatureTesting
【原文标准名称】:低温测试用橡胶调节的标准实施规程
【标准号】:ASTMD832-2007
【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】:D11.14
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:炭黑;低温测试;天然橡胶;工艺;橡胶;试样制备;合成橡胶;测试
【英文主题词】:brittleness;brittlepoint;crystallization;enthalpy;firstordertransition;glasstransition;lowtemperaturetest;modulus;plasticizereffects;resilience;secondordertransition;simpletemperatureeffects;solubility;stiffening;subnormaltempera
【摘要】:Lowtemperaturetestingofrubbercanyieldrepeatableresultsonlyifthepreconditioningofthesamplesisconsistent.Propertiessuchasbrittlenessandmodulusaregreatlyaffectedbyvariationsintime/temperatureexposures.Thispracticeisintendedtoprovideuniformconditioningforthevariouslowtemperaturetestsconductedonrubbers.1.1Thispracticecoversthecharacteristicmechanicalbehaviorofrubbersatlowtemperatures,andoutlinestheconditioningprocedurenecessaryfortestingatthesetemperatures.1.2Oneofthefirststagesinestablishingasatisfactorytechniqueforlowtemperaturetestingisthespecificationofthetimeandtemperatureofexposureofthetestspecimen.Ithasbeendemonstratedthatanyoneormoreofthefollowingdistinctchanges,whicharedetailedinTable1,maytakeplaceonloweringthetesttemperature:1.2.1Simpletemperatureeffects,1.2.2Glasstransitions,and1.2.3Firstordertransitions(crystallization),andsolubilityandothereffectsassociatedwithplasticizers.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G49
【国际标准分类号】:83_040_10
【页数】:4P.;A4
【正文语种】: