Designation:D5225−17StandardTestMethodforMeasuringSolutionViscosityofPolymerswithaDifferentialViscometer1ThisstandardisissuedunderthefixeddesignationD5225;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthedeterminationofthesolu-tionviscosityofpolymersusingadifferentialorthemodifieddifferentialviscometer.Itisapplicabletoallpolymersthatdissolvecompletelywithoutchemicalreactionordegradationtoformsolutionsthatarestablewithtimeandtemperature.Resultsofthetestareusuallyexpressedasspecificviscosity,intrinsicviscosity(limitingviscositynumber),inherentviscos-ity(logarithmicviscositynumber),orrelativeviscosity(vis-cosityratio).1.2Sincethereismorethanonetypeofviscometeravail-abletomeasureadifferentialpressure,followthemanufactur-er’sdirectionsapplicabletotheequipmentbeingused.1.3ThesolutionviscosityvaluesarecomparablewiththoseobtainedusingaglasscapillaryofTestMethodD2857.Thistestmethoddiffersfromtheglasscapillaryinthatthesolventandthesolutionarecomparedatthesametimethatatestisrun.Withaglasscapillary,eachsolutionmustbereferencedbacktothesolventruninthesamecapillaryatthesametemperature.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeSection8.NOTE1—ThereisnoknownISOequivalenttothisstandard.1.6Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsis...
