【英文标准名称】:Plastics-Determinationoftemperatureofdeflectionunderload-Part2:Plasticsandebonite
【原文标准名称】:塑料.载荷下挠曲温度的测定.第2部分:塑料和硬橡胶
【标准号】:ISO75-2-2004
【标准状态】:现行
【国别】:国际
【发布日期】:2004-05-01
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC61
【标准类型】:()
【标准水平】:()
【中文主题词】:塑料;尺寸稳定性;热稳定性;抗弯应力;温度测量;弯曲试验;材料试验;硫化橡胶;温度;试验条件;硬橡胶;测定;试验
【英文主题词】:Bendtesting;Bendingstress;Determination;Dimensionalstability;Ebonite;Materialstesting;Plastics;Temperature;Temperaturemeasurement;Testing;Testingconditions;Thermalstability;Vulcanizedrubber
【摘要】:ThispartofISO75specifiesthreemethods,usingdifferentvaluesofconstantflexuralstress,thatcanbeusedforthedeterminationofthetemperatureofdeflectionunderloadofplastics(includingfilledplasticsandfibre-reinforcedplasticsinwhichthefibrelength,priortoprocessing,isupto7,5mm)andebonite:—methodA,usingaflexuralstressof1,80MPa;—methodB,usingaflexuralstressof0,45MPa;—methodC,usingaflexuralstressof8,00MPa.ThestandarddeflectionAsusedtodeterminethetemperatureofdeflectionunderloadcorrespondstoaflexural-strainincreaseAqdefinedinthispartofISO75.TheinitialflexuralstrainduetotheloadingofthespecimenatroomtemperatureisneitherspecifiednormeasuredinthispartofISO75.Theratioofthisflexural-straindifferencetotheinitialflexuralstraindependsonthemodulusofelasticity,atroomtemperature,ofthematerialundertest.Thismethodisthereforeonlysuitableforcomparingthetemperaturesofdeflectionofmaterialswithsimilarroom-temperatureelasticproperties.NOTEThemethodsgivebetterreproducibilitywithamorphousplasticsthanwithsemi-crystallineones.Withsomematerials,itmaybenecessarytoannealthetestspecimenstoobtainreliableresults.Annealingprocedures,ifused,generallyresultinanincreaseinthetemperatureofdeflectionunderload(see6.6).Foradditionalinformation,seeISO75-1:2004,clause1.
【中国标准分类号】:G31
【国际标准分类号】:83_080_10
【页数】:18P.;A4
【正文语种】:英语