【英文标准名称】:StandardTestMethodforOxidative-InductionTimeofPolyolefinsbyDifferentialScanningCalorimetry
【原文标准名称】:用差示扫描量热法测定聚烯烃的氧化感应时间的标准试验方法
【标准号】:ASTMD3895-2007
【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】:D20.30
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:分析;感应;塑料;聚烯烃;测试
【英文主题词】:differentialscanningcalorimetry;oxidativeinductiontime;polyolefins
【摘要】:TheOITisaqualitativeassessmentofthelevel(ordegree)ofstabilizationofthematerialtested.Thistestcanbeusedasaqualitycontrolmeasuretomonitorthestabilizationlevelinformulatedresinasreceivedfromasupplier,priortoextrusion.Note28212;TheOITmeasurementisanacceleratedthermal-agingtestandassuchcanbemisleading.Cautionshouldbeexercisedindatainterpretationsinceoxidationreactionkineticsareafunctionoftemperatureandtheinherentpropertiesoftheadditivescontainedinthesample.Forexample,OITresultsareoftenusedtoselectoptimumresinformulations.VolatileantioxidantsmaygeneratepoorOITresultseventhoughtheymayperformadequatelyattheintendedusetemperatureofthefinishedproduct.Note38212;Thereisnoacceptedsamplingprocedure,norhaveanydefinitiverelationshipsbeenestablishedforcomparingOITvaluesonfieldsamplestothoseonunusedproducts,hencetheuseofsuchvaluesfordetermininglifeexpectancyisuncertainandsubjective.1.1Thistestmethodoutlinesaprocedureforthedeterminationofoxidative-inductiontime(OIT)ofpolymericmaterialsbydifferentialscanningcalorimetry(DSC).Itisapplicabletopolyolefinresinsthatareinafullystabilized/compoundedform.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SpecifichazardsinformationisgiveninSection8.Note1ThistestmethodissimilartoISO11357-6,butnotequivalent.ISOprocedureprovidesadditionalinformationnotsuppliedbythistestmethod.
【中国标准分类号】:G31
【国际标准分类号】:83_080_20
【页数】:8P.;A4
【正文语种】: