1、Designation:D336721Standard Test Method forPlasticizer Sorption of Poly(Vinyl Chloride)Resins UnderApplied Centrifugal Force1This standard is issued under the fixed designation D3367;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,th
2、e 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 covers the determination of the plas-ticizer sorption of poly(vinyl chloride)(PVC)homopolymersu
3、sing a controlled centrifugal force.1.2 The values stated in SI units are to be regarded as thestandard.1.3 This test method references notes and footnotes thatprovide explanatory material.These notes and footnotes(ex-cluding those in tables and figures)shall not be considered asrequirements of this
4、 test method.NOTE1This standard is equivalent to ISO 4608.1.4 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-priate safety,health,and environmental practices and deter-mine the
5、 applicability of regulatory limitations prior to use.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued
6、 by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D883 Terminology Relating to Plastics2.2 ISO Standards:ISO 4608 Homopolymers and Copolymers of Vinyl Chlo-ride for General UseDetermination of Plasticizer Ab-sorption at Room Temperatu
7、re33.Terminology3.1 DefinitionsFor definitions that appear in this practicerelating to plastics refer to Terminology D883.4.Summary of Test Method4.1 A sample of PVC is saturated with plasticizer in ascreening tube with an amount of plasticizer equal to approxi-mately twice the weight of the PVC.The
8、 PVC and plasticizerare subjected to centrifugation for a specified time.A smallamount of cotton is weighed into the screening tube beforeweighing of the PVC to prevent PVC particles from escapingthrough the orifice of the tube during weighing and centrifu-gation.Plasticizer that is not absorbed by
9、the PVC particles isremoved by the centrifugation through the orifice of thescreening tube.5.Significance and Use5.1 This test method provides a quantitative measure of therelative plasticizer absorption of general-purpose poly(vinylchloride)resins under standard temperature conditions.Plasti-cizer
10、sorption thus defined is one of the criteria useful for thedescription of the powder blend characteristics of poly(vinylchloride)resins.6.Apparatus and Materials6.1 Centrifuge,whose rotor turns in a horizontal plane andhas an acceleration under the test conditions of 24 500 to29 500 m s2measured at
11、the level of the bottom of the tube,with,if necessary,a cooling system to prevent the temperatureof the mixture from exceeding 30C(86F)at the end of thecentrifuging for 60 min.NOTE2It is permissible to use higher acceleration to reduce thecentrifuging time,for example,34 000 m s2and 30 min,provided
12、thatit has been verified that the results obtained are equivalent.6.2 Centrifuge Tubes,to fit the centrifuge used,of glass orplastic,with a conical bottom pierced by a hole of 0.8-mmdiameter(see Fig.1).NOTE3It has been found using Fisherbrand Disposable Filter Column(Fisher HealthCare)#11-387-50,wor
13、ks well in this application.It isrecommended removing the filter paper before placing the cotton in thecolumn.1This test method is under the jurisdiction of ASTM Committee D20 on Plasticsand is the direct responsibility of Subcommittee D20.15 on Thermoplastic Materi-als.Current edition approved Jan.
14、15,2021.Published January 2021.Originallyapproved in 1975.Last previous edition approved in 2013 as D3367-13.DOI:10.1520/D3367-21.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,
15、refer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive
16、,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized 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.16.3 Plastic Sheaths(metal,polyamide,polyethylene,and soforth),with a piece of PVC pipe at the bottom to support thecentrifuge t