MIL-HDBK-1897 (NOTICE 1)

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MIL-HDBK-1897 (NOTICE 1), DEPARTMENT OF DEFENSE HANDBOOK: TOLERANCES FOR INVESTMENT CASTINGS (15 APR 2004) [SUPERSEDING MIL-STD-1897]., MIL-HDBK-1897, dated 17 May 1996, has been reviewed and determined to be valid for use in acquisitions.
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【英文标准名称】:Bindersforpaintsandvarnishes-Gelpermeationchromatography(GPC)-Part1:Tetrahydrofuran(THF)aseluent
【原文标准名称】:色漆和清漆用粘合剂凝胶渗透色谱法(GPC)第1部分:用四氢呋喃作洗脱溶剂
【标准号】:ISO13885-1-1998
【标准状态】:作废
【国别】:国际
【发布日期】:1998-12
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC35
【标准类型】:()
【标准水平】:()
【中文主题词】:粘合剂;清漆;涂层材料;试验;涂料;含量测定;高效液体色谱分析法;凝胶渗透色谱法;凝胶渗透色谱法;定义;化学分析和试验
【英文主题词】:Apparatus;Bindingagents;Calibration;Chemicalanalysisandtesting;Chromatograms;Chromatography;Coatingmaterials;Coatings;Definition;Definitions;Determinationofcontent;Gelpermeationchromatography;Gels;GPC;Highperformanceliquidchromatography;HPLC;Investigations;Liquidchromatography;Measurement;Molarmass;Paints;Permeation;Plastics;Polymers;Specimenpreparation;Testequipment;Testing;Tetrahydrofuran;Varnishes
【摘要】:ThispartofISO13885isoneofaseriesofstandardsdealingwiththesamplingandtestingofpaints,varnishesandrelatedproducts.Itdescribesconditionsforthedeterminationofthemolecular-massdistribution,number-averagemolecularmassMnandmass-averagemolecularmassMwofpolymersthataresolubleinTHF(tetrahydrofuran)bygelpermeationchromatography(GPC).Itispossiblethat,inspiteofthegoodrepeatabilityobtainedwiththismethod,itcannotbeusedwithcertainpolymertypesbecauseofspecificinteractions,suchasadsorptionwithinthesample/eluent/columnsystem.Themethodisnotanabsoluteoneandrequirescalibrationwithcommerciallyavailableunbranched-polystyrenestandardsthathavebeencharacterizedbyabsolutemethods.Theresultsforsamplesofpolymersotherthanpolystyrenearethereforeonlycomparablewithingroupsofsamplesofthesametype.TheconditionsspecifiedinthispartofISO13885arenotsuitablefortheGPCanalysisofpolymersampleswithMwvaluesgreaterthan10(seeannexA).Nocorrectionmethods,e.g.fortheeliminationofpeakbroadening,areincludedinthispartofISO13885.Ifabsolutemolecular-massvaluesarerequired,anabsolutemethod,e.g.membraneosmometryforMnorlightscatteringforMw,mustbeused.note:1)Alsoknownassizeexclusionchromatography(SEC).
【中国标准分类号】:G38
【国际标准分类号】:87_060_20
【页数】:24P;A4
【正文语种】:英语


基本信息
标准名称:简式长方形垫板
中标分类: 机械 >> 工艺装备 >> 组合卡具
替代情况:HB 1467-75
发布日期:1987-04-08
实施日期:1987-07-01
首发日期:1900-01-01
作废日期:1900-01-01
出版日期:1900-01-01
页数:2页
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所属分类: 机械 工艺装备 组合卡具