SAE AMSQQA200/4 Aluminum Alloy 5083, Bar, Rod, Shapes, Tube, and Wire, Extruded

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【英文标准名称】:StandardPracticeforSeparationandIdentificationofPoly(VinylChloride)(PVC)ContaminationinPoly(EthyleneTerephthalate)(PET)Flake
【原文标准名称】:聚乙烯对酞酰小片中聚氯乙烯杂质分离和鉴定的标准操作
【标准号】:ASTMD5991-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:D20.95
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:contamination;poly(ethyleneterephthalate)(PET);poly(vinylchloride)(PVC);recycledplastics;Contamination--plastics;Identification;PET(poly(ethyleneterephthalate));Poly(vinylchloride)(PVC);Recycledplastics
【摘要】:PresenceofevenlowconcentrationsofPVCinrecycledPETflakesmayresultinequipmentcorrosionproblemsduringprocessing.ThelevelofPVCcontaminationmayalsodictatethemarketforuseoftherecycledpolymerinsecondaryproducts.Procedurespresentedinthispracticeareusedtoidentifyand,ifdesired,estimatetheconcentrationofPVCcontaminationinrecycledPETflakes.1.1Thispracticecoversfourproceduresforseparationandqualitativeidentificationofpoly(vinylchloride)(PVC)contaminationinpoly(ethyleneterephthalate)(PET)flakes.Note18212;Althoughnotpresentedasaquantitativemethod,procedurespresentedinthispracticemaybeusedtoprovidequantitativeresultsatthediscretionoftheuser.Theuserassumestheresponsibilitytoverifythereproducibilityofquantitativeresults.DatafromanindependentsourcesuggestaPVCdetectionlevelof200ppm(w/w)basedonanoriginalsampleweightof454g.1.2ProcedureAisbasedondifferentfluorescenceofPVCandPETwhenthesepolymersareexposedtoultraviolet(UV)light.1.3ProcedureBisanoventestbaseduponthecharringofPVCwhenitisheatedinairat235x00B0;C.1.4ProceduresCandDaredyetestsbasedondifferentialstainingofPVCandPET.Note28212;Otherpolymers(forexample,PETG)alsoabsorbthestainorbrightener.SuchinterferenceswillresultinfalsepositiveidentificationofPVCasthecontaminant.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.ForspecifichazardsseeSection8.Note38212;ThereisnoknownISOequivalenttothispractice.
【中国标准分类号】:G31
【国际标准分类号】:83_080_10
【页数】:3P.;A4
【正文语种】:英语


【英文标准名称】:Informationtechnology-Mobilemulticastcommunications:Framework
【原文标准名称】:信息技术.移动式多路广播通信:框架
【标准号】:ISO/IEC24793-1-2010
【标准状态】:现行
【国别】:国际
【发布日期】:2010-12
【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/IECJTC1/SC6
【标准类型】:()
【标准水平】:()
【中文主题词】:电路网络;通讯;通信系统;数据通信;数据交换;数据网络;数据处理;数据传送;定义(术语);信息交换;信息技术;因特网协议;IP;多点传送;多点连接;电讯;电信网;电信;无线的
【英文主题词】:Circuitnetworks;Communication;Communicationsystems;Datacommunication;Dataexchange;Datanetwork;Dataprocessing;Datatransfer;Definitions;Informationinterchange;Informationtechnology;InternetProtocol;IP;Multicast;Multipointconnections;Telecommunication;Telecommunicationnetworks;Telecommunications;Wireless
【摘要】:
【中国标准分类号】:M60
【国际标准分类号】:35_100_70
【页数】:22P;A4
【正文语种】:英语