Designation:D3291−11StandardPracticeforCompatibilityofPlasticizersinPoly(VinylChloride)PlasticsUnderCompression1ThisstandardisissuedunderthefixeddesignationD3291;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thispracticedeterminesthecompatibilityofplasticiz-ersinpoly(vinylchloride)plasticsbyratingtheamountofplasticizerthatspewsduetocompressionalstresssetupinsidea180°loopbend.NOTE1—Ingredientsotherthanplasticizercanspewfromatotalformulation.1.2Thetextofthispracticereferencesnotesandfootnotesthatprovideexplanatorymaterial.Thesenotesandfootnotes(excludingthoseintablesandfigures)shallnotbeconsideredasrequirementsofthispractice.1.3ThevaluesasstatedinSIunitsaretoberegardedasthestandard.Thevaluesinparenthesesaregivenforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.NOTE2—ThereisnoknownISOequivalenttothisstandard.2.ReferencedDocuments2.1ASTMStandards:2D883TerminologyRelatingtoPlasticsD1600TerminologyforAbbreviatedTermsRelatingtoPlas-tics3.Terminology3.1General—DefinitionsareinaccordancewithTerminol-ogyD883andabbreviationswithTerminologyD1600,unlessotherwiseindicated.4.SummaryofPractice4.1Testspecimensofplasticizedpoly(vinylchloride)sheetarebentthroughanarcofapproximately180°.Theinnerradiusofthebendisequaltothethicknessofthespecimen.Thesebentspecimensaresecuredinajigdesignedtoholdtheminthedesiredconformation.Atspecifiedintervalsoftime,aspecimenisremoved,bent360°intheoppositedirection,andtheformerinsideoftheloop(nowtheoutside)isexaminedforevidenceofplasticizerspew.5.SignificanceandUse5.1Itispossibleforplasticizerstobecomelesscompatibleinpoly...
