1、Designation: D 3367 98 (Reapproved 2004)Standard Test Method forPlasticizer Sorption of Poly(Vinyl Chloride) Resins UnderApplied Centrifugal Force1This standard is issued under the fixed designation D 3367; the number immediately following the designation indicates the year oforiginal adoption or, i
2、n the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope*1.1
3、 This test method covers the determination of the plas-ticizer sorption of poly(vinyl chloride) (PVC) homopolymersusing a controlled centrifugal force.1.2 The values stated in SI units are to be regarded as thestandard.1.3 This standard does not purport to address all of thesafety concerns, if any,
4、associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.1.4 This test method references notes and footnotes thatprovide explanatory material. These note
5、s and footnotes (ex-cluding those in tables and figures) shall not be considered asrequirements of this test method.NOTE 1This standard and ISO 4608-1984 are identical in all technicaldetails.2. Referenced Documents2.1 ASTM Standards:2D 883 Terminology Relating to PlasticsD 1600 Terminology for Abbr
6、eviated Terms Relating toPlastics2.2 ISO Standards:ISO 4608-1984 Homopolymers and Copolymers of VinylChloride for General UseDetermination of PlasticizerAbsorption at Room Temperature33. Terminology3.1 DefinitionsDefinitions are in accordance with Termi-nology D 883 and Terminology D 1600, unless ot
7、herwiseindicated.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 PVC and plasticizerare subjected to centrifugation for a specified time. A smallamount of cotton is we
8、ighed 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 the PVC particles isremoved by the centrifugation through the orifice of thescreening tube.5. Signifi
9、cance 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 sorption thus defined is one of the criteria useful for thedescription of the powder blend charact
10、eristics 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 the level of the bottom of the tube,with, if necessary, a cooling system to prevent the tempera
11、tureof the mixture from exceeding 30C at the end of thecentrifuging for 60 min.NOTE 2It is permissible to use higher acceleration to reduce thecentrifuging time, for example, 34 000 m s2and 30 min, provided thatit has been verified that the results obtained are equivalent.6.2 Centrifuge Tubes, to fi
12、t the centrifuge used, of glass orplastic, with a conical bottom pierced by a hole of 0.8-mmdiameter (see Fig. 1).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 D20.15.08).Current
13、 edition approved March 1, 2004. Published June 2004. Originallyapproved in 1975. Last previous edition approved in 1998 as D 3367 - 98.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume in
14、formation, 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 10036.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive
15、, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.3 Plastic Sheaths (metal, polyamide, polyethylene, and soforth), with a piece of PVC pipe at the bottom to support thecentrifuge tube (see Fig. 1).6.4 Cotton Wool, pharmaceutical grade, having a DOPabsorption measured under the test co
16、nditions (6.4.1) ofapproximately 10 %.NOTE 3Alternative materials to cotton wool may be used if it can beshown that they produce equivalent results; for example, glass wool, andPTFE-coated polyester felt.6.4.1 Measurement of DOP Absorbed by Cotton WoolInaccordance with Section 8, carry out a test wi
17、th a piece ofcotton wool having a mass of 100 6 2 mg, but without resin.Determine the mass of DOP absorbed by the cotton wool ingrams (mass m0).6.5 Di(2-ethyl hexyl)phthalate (DOP).7. Conditioning7.1 The PVC and plasticizer shall be at 23 6 1C73.4 6 1.8F and 50 6 5 % relative humidity for at least 1
18、 hbefore testing.7.2 Perform the centrifugation with centrifuge and testsamples at 23 6 1C.8. Procedure8.1 Weigh a piece of cotton wool (100 6 2 mg), place it inthe centrifuge tube, and pack it down slightly. Weigh the tubeand cotton wool to the nearest 60.1 mg, m1being the mass ingrams of the prepa
19、red tube.8.2 Weigh into the tube to the nearest 1 mg2goftheresinunder test, m2being the mass in grams of the prepared tubeplus resin, to the nearest 0.1 mg.8.3 From a pipette, run into the tube 4 mL of DOP and allowit to stand for about 10 min.8.4 Place the tube in its sheath and place the sheath in
20、to oneof the compartments of the centrifuge rotor (the other com-partments being occupied by tubes containing other resinsamples, all the tubes being balanced.8.5 Set the centrifuge to give an acceleration of 24 500 to29 500 m s2at the level of the bottom of the tube for 60 min.If necessary, the coo
21、ling device shall be switched on duringcentrifuging. Check that the temperature does not exceed 30C.8.6 Remove the tube from its sheath, carefully wipe it toremove any DOP on the outside, and weigh it to the nearest 0.1mg, m3being the mass in grams of the tube containing the resinand the absorbed DO
22、P.9. Calculation9.1 The room temperature plasticizer absorption, reportedas parts of DOP absorbed per 100 parts resin (p.h.r.) is given bythe following formula:m32 m0! 2 m2m22 m13 100where:m0= mass, of DOP absorbed by cotton wool, g,m1= mass, of centrifuge tube with cotton wool, g,m2= mass, of centr
23、ifuge tube with resin, g, andm3= mass of centrifuge tube with resin and absorbed DOP,g.10. Report10.1 Report the plasticizer sorption of the test sample, %.11. Precision and Bias411.1 The precision of the test method calculated by analysisof round-robin data from six laboratories is as follows:11.1.
24、1 Repeatability Coefficient of variation (average ofreplicates) within a laboratory of 3.6 %.11.1.2 Reproducibility Coefficient of variation (averageof replicates) between laboratories of 8.0 %.11.2 BiasNo justifiable statement of bias can be made forthis test method since the true value of the prop
25、erty cannot beestablished by an accepted referee method.12. Keywords12.1 DOP; plasticizer sorption; poly(vinyl chloride) resin4The round-robin precision data for this test method may be obtained fromASTM Headquarters. Request RR:D 20-1043.NOTEDimensions in millimetres.FIG. 1 Example of Centrifuge Tu
26、be and SheathD 3367 98 (2004)2SUMMARY OF CHANGESThis section identifies the location of selected changes to this test method. For the convenience of the user,Committee D20 has highlighted those changes that impact the use of this test method. This section also includesdescriptions of the changes or
27、reasons for the changes, or both.D 3367 - 98 (2004):(1) Reapproved without change.D 3367 - 98:(1) Section 1.4 was added and clarified notes and footnotes.(2) Section 6 was revised to describe apparatus and materialsrather than referencing sources.(3) Section 8 was changed to ISO instruction detail.(
28、4) Section 9 was changed to ISO calculation detail.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent righ
29、ts, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for
30、revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing
31、you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).D 3367 98 (2004)3
