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【英文标准名称】:StandardTestMethodforRubberFromNaturalSources-PlasticityRetentionIndex(PRI)
【原文标准名称】:天然橡胶塑性保持指数(PRI)的标准试验方法
【标准号】:ASTMD3194-2004
【标准状态】:现行
【国别】:
【发布日期】:2004
【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】:D11.22
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:合成橡胶;试验;指数;橡胶;炭黑;天然橡胶
【英文主题词】:naturalrubber;plasticity;P.R.I.;retentionindex
【摘要】:Thistestmethodmaybeusedtoevaluatetheheatand/oroxidationstability(aging)ofrawrubberundercontrolledconditions.Highoriginalandagedplasticityvaluesusuallycorrespondtogoodagingproperties.Theratiooftheagedtooriginalplasticityvaluesexpressedasapercentage,thePRI,isusedasanindicationofaging.1.1Thistestmethodgivesanindicationoftheoxidationresistanceofrawnaturalrubberataspecifiedtemperature.ThisresistanceisindicatedbythePlasticityRetentionIndex(PRI),aratioexpressedasapercentageoftheagedplasticitytotheoriginalplasticitydeterminedbymeansofaparallelplateplastometer.AlowPRIvalueindicatesapoorresistancetooxidation.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G34
【国际标准分类号】:
【页数】:3P.;A4
【正文语种】: