【英文标准名称】:StandardTestMethodforp-PhenylenediamineAntidegradantsPuritybyGasChromatography
【原文标准名称】:用气相色谱法测试p-苯二胺抗降解剂纯度的标准试验方法
【标准号】:ASTMD4937-1996(2006)e1
【标准状态】:现行
【国别】:
【发布日期】:1996
【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】:D11.11
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:试验;气相色谱法;杂质;化学
【英文主题词】:antidegradant;antioxidant;antiozanant;gaschromatography;N-isopropyl-N`-phenyl-p-phenylenediamene(IPPD);N-(1,3dimethylbutyl)-N`-phenyl-p-phenylenediamene(6PPD);N,N`bis-(14-dimethylpentyl)-p-phenylenediamene(77PD);N,N`-ditolyl-p-phenylenediamene
【摘要】:ThistestmethodisdesignedtoassesstherelativepurityofproductionPPDs.Theseadditivesareprimarilyusedasantiozonantsfortiresandotherrubberorpolymericproducts.Sincetheresultsofthistestmethodarebasedonareanormalization,itassumesthatallcomponentsareelutedfromthecolumnandeachcomponenthasthesamedetectorresponse.Althoughthisisnotstrictlytrue,theerrorsintroducedarerelativelysmallandmuchthesameforallsamples;thus,theycanbeignoredsincetheintentofthetestmethodistoestablishrelativepurity.Althoughtraceamountsofx201C;lowboilersx201D;arepresentinproductionsamples,theyaredisguisedbythesolventpeakwhenusingpackedcolumns(ProcedureA).1.1ThistestmethodcoversthedeterminationofthepurityofClassI,II,andIIIp-phenylenediamine(PPD)antidegradantsasdescribedinClassificationD4676bygaschromatography(GC)detectionandareanormalizationfordatareduction.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:C04
【国际标准分类号】:71_040_30
【页数】:7P.;A4
【正文语种】:


【英文标准名称】:Presstools-Guidepillars-TypeB,end-lockingpillars
【原文标准名称】:冲压工具.导柱.B型端锁式导柱
【标准号】:BS7568-27-1993
【标准状态】:现行
【国别】:英国
【发布日期】:1993-09-15
【实施或试行日期】:1993-09-15
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:名称与符号;材料变形设备;柱;尺寸公差;压力设备;尺寸;硬度
【英文主题词】:Guideposts;Pressworkingsofmetals;Shaping;Stamp;Tools;Types
【摘要】:Specifiesthedimensionsandmaterialhardness.
【中国标准分类号】:J50
【国际标准分类号】:25_120_10
【页数】:12P.;A4
【正文语种】:英语