1、Designation:D238319Standard Test Method forTesting Plasticizer Compatibility in Poly(Vinyl Chloride)(PVC)Compounds Under Humid Conditions1This standard is issued under the fixed designation D2383;the number immediately following the designation indicates the year oforiginal adoption or,in the case o
2、f revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method defines the conditions for the exposureand qualitative evaluation of plasticized p
3、oly(vinyl chloride)(PVC)compounds for plasticizer compatibility under humidconditions.Change in appearance is used for judging compat-ibility.1.2 The text of this test method references notes andfootnotes that provide explanatory material.These notes andfootnotes(excluding those in tables and figure
4、s)shall not beconsidered as requirements of this test method.1.3 The values stated in SI units are to be regarded asstandard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-
5、priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.NOTE1There is no known ISO equivalent to this test method.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-izati
6、on established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D883 Terminology Relating to PlasticsD1600 Terminology forA
7、bbreviated Terms Relating to Plas-ticsD1755 Specification for Poly(Vinyl Chloride)ResinsE145 Specification for Gravity-Convection and Forced-Ventilation Ovens3.Terminology3.1 GeneralDefinitions are in accordance with Terminol-ogy D883 and abbreviations with Terminology D1600,unlessotherwise indicate
8、d.4.Summary of Test Method4.1 Specimens are suspended over water in closed contain-ers and aged at either 60C or 80C.The specimens areremoved from the containers at specified intervals and theirappearance is rated in accordance with 10.1 and recorded.5.Significance and Use5.1 This test method provid
9、es an accelerated method fordetermining the stability of plasticized PVC compounds withrespect to plasticizer compatibility under humid conditions.5.2 The temperatures and humidity employed in this test canrepresent actual use conditions,but are intended primarily forrating materials.6.Apparatus6.1
10、Screw-Cap Glass Jars or Capped Metal Containers,large enough to avoid contact between specimens and betweenthe specimens and 1 cm of deionized water.The covers shall beprovided on the inside with hooks of a corrosion-resistantmetal such as stainless steel,nichrome,or nickel.6.2 Forced-Ventilation La
11、boratory Oven,Type II,Grade A,in accordance with Specification E145.7.Materials7.1 Distilled WaterFreshly prepared distilled or deionizedwater.8.Specimen Preparation(Note 2)8.1 Cut test specimens with one side having a surface areaof 25 cm2from a 0.5 mm(0.02 in.)thick smooth surface plasticsheet(60.
12、05 mm(0.002 in.)Punch a small hole near the edgefor hanging the specimen.1This test method is under the jurisdiction of ASTM Committee D20 on Plasticsand is the direct responsibility of Subcommittee D20.15 on Thermoplastic Materials(Section D20.15.07).Current edition approved Aug.1,2019.Published Au
13、gust 2019.Originallyapproved in 1969.Last previous edition approved in 2014 as D2383-14.DOI:10.1520/D2383-19.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standard
14、s Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recogni
15、zed principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 NOTE2For use as a control in testing the relative performance ofplas
16、ticizers,the following clear formulation may be employed.PartsGeneral-Purpose PVC Resin:Type GP 40000 as defined in Specification D1755.100Plasticizer:Di-2-ethylhexyl phthalate(DOP)50Stabilizer:Weatherable CaZn1NOTE3The test compound suggested in Note 2 will not exude undereither test temperature specified in 9.2.9.Procedure9.1 Suspend the specimens from hooks over 1-1.3 cm ofdistilled water in closed containers so that they do not touch thewater layer,sides of the container,or each other.9.2 Pl
