【英文标准名称】:TestMethodforCoefficientofLinearThermalExpansionofPlastics(08.01)
【原文标准名称】:塑料线性热膨胀系数测试方法(08.01)
【标准号】:ANSI/ASTMD696-1998
【标准状态】:作废
【国别】:美国
【发布日期】:1998
【实施或试行日期】:
【发布单位】:美国国家标准学会(ANSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:试验;塑料
【英文主题词】:plastics;testing
【摘要】:Thistestmethodcoversdeterminationofthecoefficientoflinearthermalexpansionforplasticmaterialshavingcoefficientsofexpansiongreaterthan1X10-61?Cbyuseofavitreoussilicadilatometer.Atthetesttemperaturesandunderthestressesimposed,theplasticmaterialsshallhaveanegligiblecreeporelasticstrainrateorboth,insofarasthesepropertieswouldsignificantlyaffecttheaccuracyofthemeasurements.Note1-ThereisnosimilarorequivalentISOstandard.TestMethodE228shallbeusedfortemperaturesotherthan-30?Cto30?C.Thistestmethodshallnotbeusedformeasurementsonmaterialshavingaverylowcoefficientofexpansion(lessthan1X10-61?C).Formaterialshavingverylowcoefficientofexpansion,interferometerorcapacitancetechniquesarerecommended.Thethermalexpansionofaplasticiscomposedofareversiblecomponentonwhicharesuperimposedchangesinlengthduetochangesinmoisturecontent,curing,lossofplasticizerorsolvents,releaseofstresses,phasechangesandotherfactors.Thistestmethodisintendedfordeterminingthecoefficientoflinearthermalexpansionundertheexclusionofthesefactorsasfaraspossible.Ingeneral,itwillnotbepossibletoexcludetheeffectofthesefactorscompletely.Forthisreason,thetestmethodcanbeexpectedtogiveonlyanapproximationtothetruethermalexpansion.ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesinparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyproblems,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G31
【国际标准分类号】:83_080_01
【页数】:
【正文语种】:英语