【英文标准名称】:StandardPracticeforDiluteSolutionViscosityofPolymers
【原文标准名称】:聚合物稀溶液粘度的标准实施规程
【标准号】:ASTMD2857-1995(2007)
【标准状态】:现行
【国别】:美国
【发布日期】:1995
【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】:D20.70
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:flowandflowrate-thermoplastics;polymers-molecularweight;viscosity-dilute-solution;viscosity-intrinsic;viscosity-plastics
【摘要】:1.1Thispracticecoversthedeterminationofthedilutesolutionviscosityofpolymers.ThereareseveralASTMstandards(TestMethodsD789,D1243,D1601,andD4603,andPracticeD3591)thatdescribedilutesolutionviscosityproceduresforspecificpolymers,suchasnylon,poly(vinylchloride),polyethylene,andpoly(ethyleneterephthalate).Thispracticeiswrittentoaugmentthesestandardswhenproblemsarisewithwhichthespecificprocedureisnotconcerned,orwhennostandardisavailableforthepolymerunderinvestigation.1.2Thispracticeisapplicabletoallpolymersthatdissolvecompletelywithoutchemicalreactionordegradationtoformsolutionsthatarestablewithtimeatatemperaturebetweenambientand150C.Resultsareusuallyexpressedasrelativeviscosity(viscosityratio),inherentviscosity(logarithmicviscositynumber),orintrinsicviscosity(limitingviscositynumber)(see).1.3Forpolyamides,relativeviscosityvaluesbythisprocedurearenotequivalenttothosedeterminedbyTestMethodsD789.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note1-ThisstandardandISO1628,"Plastics-DeterminationofViscosityNumberandLimitingViscosityNumber,"aretechnicallyequivalent.
【中国标准分类号】:G31
【国际标准分类号】:83_080_01
【页数】:6P.;A4
【正文语种】:英语