Designation:D1343−95(Reapproved2011)StandardTestMethodforViscosityofCelluloseDerivativesbyBall-DropMethod1ThisstandardisissuedunderthefixeddesignationD1343;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thistestmethoddescribestheapparatusandgeneralprocedureformakingball-dropviscositymeasurementsonsolutionsofvariouscellulosederivatives.Instructionsforsamplepreparation,solutionconcentration,andotherdetailsarediscussedintheASTMmethodsfortherespectivecellulosederivatives.1.2Thistestmethodisapplicabletosolutionsofvariouscellulosederivativeshavingviscositiesgreaterthan10P,byusingballsofvariousdiametersanddensities.Viscosityresultsareexpressedpreferablyinpoises.1.3Incommercialpractice,viscositiesareoftenexpressedinsecondsusing2.38-mm(3⁄32-in.)stainlesssteelballs.2Whentheviscosityisoutsidethepracticalrangefortheseballs(75to300P),themeasurementcanbemadeusingacalibratedpipetviscometeroradifferentballandcalculatingtheobservedviscositytothecorrespondingtimefora2.38-mm(3⁄32-in.)ball,eventhoughitisasmallfractionofasecond.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:3D301TestMethodsforSolubleCelluloseNitrate(With-drawn2011)4D445TestMethodforKinematicViscosityofTransparentandOpaqueLiquids(andCalculationofDynamicViscos-ity)D817TestMethodsofTestingCelluloseAcetatePropionateandCelluloseAcetateButyrateD871TestMethodsofTestingCelluloseAcetateE691PracticeforCond...
