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NY/T 2151-2012 薇甘菊综合防治技术规程

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基本信息
标准名称:薇甘菊综合防治技术规程
发布部门:中华人民共和国农业部
发布日期:2012-06-06
实施日期:2012-09-01
首发日期:
作废日期:
出版社:中国农业出版社
出版日期:2012-09-01
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所属分类: 农业 林业 经济作物 其他经济作物
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【英文标准名称】:Plastics-Determinationoftheviscosityofpolymersindilutesolutionusingcapillaryviscometers-Poly(vinylchloride)resins
【原文标准名称】:塑料.用毛细粘度计测定稀释溶液中聚合物的粘度值.聚氯乙烯树脂
【标准号】:BSENISO1628-2-2000
【标准状态】:现行
【国别】:英国
【发布日期】:2000-04-15
【实施或试行日期】:2000-04-15
【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】:试验条件;化学分析和试验;变换;催化剂;高聚物;试验设备;精密度;分子量;单体;均聚物;塑料;共聚物;粒状材料;聚氯乙烯;乳化剂;塑料和橡胶技术;粘度测量;污染物;浓度(化学);粘度计;聚合;毛细管;氯乙烯
【英文主题词】:Determination;Dilution;Measurement;Measuringtechniques;Plastics;Polymers;Polyvinylchloride;Resins;Solutions;Solvents;Testing;Vinylchloride;Viscometers;Viscosity;Viscositynumbers
【摘要】:ThispartofISO1628specifiesconditionsforthedeterminationofthereducedviscosity(alsoknownasviscositynumber)andK-valueofPVCresins.Itisapplicabletoresinsinpowderformwhichconsistofhomopolymersofthemonomervinylchlorideandcopolymers,terpolymers,etc.,ofvinylchloridewithoneormoreothermonomers,butwherevinylchlorideisthemainconstituent.Theresinsmaycontainsmallamountsofunpolymerizedsubstances(e.g.emulsifyingorsuspendingagents,catalystresidues,etc.)andothersubstancesaddedduringthecourseofthepolymerization.ThispartofISO1628isnotapplicable,however,toresinshavingavolatile-mattercontentinexcessof0,5%±0,1%,whendeterminedinaccordancewithISO1269.Inadditiontothis,itisnotapplicabletoresinswhicharenotentirelysolubleincyclohexanone.ThereducedviscosityandK-valueofaparticularresinarerelatedtoitsmolecularmass,buttherelationshipvariesdependingontheconcentrationandtype(s)ofothermonomer(s)present.HencehomopolymersandcopolymershavingthesamereducedviscosityorK-valuemaynothavethesamemolecularmass.ThevaluesdeterminedforreducedviscosityandK-value,foraparticularsampleofPVCresin,areinfluenceddifferentlybytheconcentrationofthesolutionchosenforthedetermination.HencetheuseoftheproceduresdescribedinthispartofISO1628willonlygivevaluesforreducedviscosityandK-valuethatarecomparablewhentheconcentrationsofthesolutionsusedareidentical.LimitingviscositynumberisnotusedforPVCresins.TheexperimentalproceduresdescribedinthispartofISO1628canalsobeusedtocharacterizethepolymericfractionobtainedduringthechemicalanalysisofaPVCcomposition.However,thevaluescalculatedforthereducedviscosityandK-valueinthesecircumstancesmaynotindicatetheactualvaluesfortheresinusedtoproducethecompositionbecauseoftheimpurenatureoftherecoveredpolymerfraction.
【中国标准分类号】:G31
【国际标准分类号】:83_080_20
【页数】:24P;A4
【正文语种】:英语


【英文标准名称】:StandardSpecificationforUraniumOreConcentrate
【原文标准名称】:铀矿石浓缩物的标准规范
【标准号】:ASTMC967-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:C26.02
【标准类型】:(Specification)
【标准水平】:()
【中文主题词】:
【英文主题词】:concentrates;uraniumore;yellowcake;Nuclearmaterials/applications--specifications;Ores;Uranium;Uranium--specifications;Uraniumore
【摘要】:1.1Thisspecificationcoversuraniumoreconcentratecontainingaminimumof65mass%uranium.1.2Thisspecificationdoesnotincluderequirementsforhealthandsafety.Observanceofthisspecificationdoesnotrelievetheuseroftheobligationtobeawareofandconformtoallapplicableinternational,national,state,andlocalregulationspertainingtopossessing,shipping,orusingsourcenuclearmaterial(see2.2).1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.
【中国标准分类号】:F46
【国际标准分类号】:27_120_30
【页数】:3P.;A4
【正文语种】:英语