【英文标准名称】:Plastics-Determinationofwaterabsorption(ISO62:2008);GermanversionENISO62:2008
【原文标准名称】:塑料.吸水性测定
【标准号】:DINENISO62-2008
【标准状态】:现行
【国别】:德国
【发布日期】:2008-05
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:吸收;吸收能力(波);测定;测量规程;湿度;潮气;塑料;水量;试件;测试;水;吸水率
【英文主题词】:Absorption;Absorptivity;Determination;Determinationprocedures;Humidity;Moisture;Plastics;Quantityofwater;Testpieces;Testing;Water;Waterabsorption
【摘要】:1.1ThisInternationalStandarddescribesaprocedurefordeterminingthemoistureabsorptionpropertiesinthe"through-the-thickness"directionofflatorcurved-formsolidplastics.ThisInternationalStandardalsodescribesproceduresfordeterminingtheamountofwaterabsorbedbyplasticspecimensofdefineddimensions,whenimmersedinwaterorwhensubjectedtohumidairundercontrolledconditions.The"through-the-thickness"moisturediffusioncoefficientcanbedeterminedforsingle-phasematerialbyassumingFickiandiffusionbehaviourwithconstantmoistureabsorptionpropertiesthroughthethicknessofthetestspecimen.Thismodelisvalidforhomogeneousmaterialsandforreinforcedpolymer-matrixcompositestestedbelowtheirglasstransitiontemperature.However,sometwo-phasematricessuchashardenedepoxiesmayrequireamulti-phaseabsorptionmodelwhichisnotcoveredbythisInternationalStandard.1.2Ideally,thebestcomparisonofthewaterabsorptionpropertiesand/ordiffusioncoefficientsofmaterialsshouldbecarriedoutonlyusingtheequilibriummoisturecontentofplasticsexposedtoidenticalconditions.Thecomparisonofmaterialsusingpropertiesatmoistureequilibriumdoesnotassume,andisthereforenotlimitedto,single-phaseFickiandiffusionbehaviour.1.3Alternatively,waterabsorptionofplasticspecimensofdefineddimensionsexposedtoimmersionorhumidityundercontrolledconditionsbutforanarbitrarytimeperiodcanbeusedtocomparedifferentbatchesofthesamematerialorforqualitycontroltestsofagivenmaterial.Forthistypeofcomparison,itisessentialthatalltestspecimensbeofidenticaldimensionsand,asnearlyaspossible,havethesamephysicalattributes,e.g.surfacesmoothness,internalstresses,etc.However,moistureequilibriumisnotreachedundertheseconditions.Therefore,resultsfromthistypeoftestcannotbeusedtocomparethewaterabsorptionpropertiesofdifferenttypesofplastics.Formorereliableresults,simultaneoustestsarerecommended.1.4TheresultsobtainedusingthemethodsdescribedinthisInternationalStandardareapplicabletomostplasticsbutarenotapplicabletocellularplastics,granulatesorpowders,whichcanshowadditionalabsorptionandcapillaryeffects.Plasticsexposedtomoistureundercontrolledconditionsfordefinedperiodsoftimeproviderelativecomparisonsbetweenthem.Thetestsdescribedforthedeterminationofthediffusioncoefficientmaynotbeapplicabletoallplastics.Plasticsthatdonotretaintheirshapewhenimmersedinboilingwatershouldnotbecomparedusingmethod2(see6.4).
【中国标准分类号】:G31
【国际标准分类号】:83_080_01
【页数】:20P.;A4
【正文语种】:德语
基本信息
| 标准名称： | IP网络端点准入控制框架技术要求 |
| 发布部门： | 工业和信息化部 |
| 发布日期： | 2011-01-01 |
| 实施日期： | 2011-01-01 |
| 首发日期： | |
| 作废日期： | |
| 出版社： | 人民邮电出版社 |
| 出版日期： | 2011-01-01 |
适用范围
本标准规定了IP网络端点准入控制的框架技术要求，包括对网络接入端点的安全状态评估、安全策略实施、安全策略管理、用户管理、安全联动控制、实时监控和安全状态感知客户端防病毒联动插件接口等方面的要求。
前言
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引用标准
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所属分类： 综合 标志 包装 运输 贮存 包装材料与容器 货物的包装和调运 麻袋 袋子