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Product Code:SAE AS9944
Title:Bolt, Machine-Double Hexagon Extended Washer Head, Drilled, Full Shank, Steel Ams 6322, Cadmium Plated, .375-24 Unjf-3a
Issuing Committee:E-25 General Standards For Aerospace And Propulsion Systems
Scope: No scope available.
Rationale: No scope available.【英文标准名称】:StandardTestMethodforMethyl(Comonomer)ContentinPolyethylenebyInfraredSpectrophotometry
【原文标准名称】:红外分光光度测定法测定聚乙烯中甲基(共聚单体)含量的标准试验方法
【标准号】:ASTMD6645-2001
【标准状态】:现行
【国别】:
【发布日期】:2001
【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】:D20.70
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:branching;comonomer;FTIR;infraredspectrophotometry;polyethylene
【摘要】:Thismethoddeterminesthenumberofbranches(thatis,comonomercontent)incopolymersofethylenewith1-butene,1-hexeneor1-octene.Thisinformationcanbecorrelatedwithphysicalpropertiessuchasmeltingpoint,density,andstiffness,allofwhichdependonthedegreeofcrystallinityofthepolymer.Differencesinthecomonomercontentthusmayhaveasignificanteffectonthefinalpropertiesofproductsmadefromtheseresins.1.1Thistestmethodcoversthedeterminationofmethylgroups(thatis,comonomercontent)inpolyethylenesbyinfraredspectrophotometry.Thetestmethodisapplicabletocopolymersofethylenewith1-butene,1-hexene,or1-octenehavingdensitiesabove900kg/m3.High-pressurelow-densitypolyethylenes(LDPE)andterpolymersareexcluded.1.2ThevaluesstatedinSIunits,basedonIEEE/ASTMS1-10,aretoberegardedasthestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note1--ThereisnosimilarorequivalentISOstandard.
【中国标准分类号】:G31
【国际标准分类号】:19_100;83_080_20
【页数】:4P.;A4
【正文语种】: