【英文标准名称】:StandardTestMethodforVinylideneUnsaturationinPolyethylenebyInfraredSpectrophotometry
【原文标准名称】:用红外线光度分光光度法测定聚乙烯中乙烯不饱和性的试验方法
【标准号】:ASTMD3124-1998(2003)
【标准状态】:现行
【国别】:
【发布日期】:1998
【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】:塑料;聚乙烯;红外线;含量测定;乙烯类制品;试验
【英文主题词】:FTIR;infraredspectrophotometry;polyethylene;vinylideneunsaturation
【摘要】:Therearethreetypesofolefinicgroupspresentinsufficientconcentrationstowarrantconsideration,oneormoreofwhichcannormallybefoundinanypolyethylene(4).Thethreetypesare:trans-vinylene,R-CH=CH-Rx2032;,sometimesreferredtoastransinternalunsaturation;vinylideneorpendentmethylene,RRx2032;C=CH2;andvinylunsaturation,R-CH=CH2,alsoreferredtoasterminalunsaturation.Thetypeandquantityofthesegroupscaninfluencethechemicalandphysicalpropertiesoftheresin.Informationconcerningtheirpresencemayalsobeusedtocharacterizeoridentifyunknownresinsorblendsofresins.Vinylideneunsaturationrepresentsthemajorportionoftheunsaturationpresentinmostlow-densitypolyethylenes.Infraredspectroscopycanbeusedforthedeterminationofunsaturationinpolyethylene(1,3,5).ThevaluesdeterminedbyinfraredagreewiththosedeterminedbyIC1uptake(5).1.1Thistestmethodisapplicabletoalltypesofpolyethylenes,thoseethyleneplasticsconsistingofethyleneand-olefincopolymerslongerthanpropylene,andblendsoftheaboveinanyratio.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SpecifichazardsstatementsaregiveninSection8.Note18212;ThereisnosimilarorequivalentISOstandard.
【中国标准分类号】:G31
【国际标准分类号】:83_080_20
【页数】:4P.;A4
【正文语种】: