1、Designation: D3367 09D3367 13Standard 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 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.This standard has been approved for use by agencies of the Department of Defense.1. Scope*1.1 This test me
3、thod covers the determination of the plasticizer sorption of poly(vinyl chloride) (PVC) homopolymers using acontrolled centrifugal force.1.2 The values stated in SI units are to be regarded as the standard.1.3 This standard does not purport to address all of the safety concerns, if any, associated w
4、ith its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.1.4 This test method references notes and footnotes that provide explanatory material. These notes and footnote
5、s (excludingthose in tables and figures) shall not be considered as requirements of this test method.NOTE 1This test method is equivalent to ISO 4608-1984.4608.2. Referenced Documents2.1 ASTM Standards:2D883 Terminology Relating to PlasticsD1600 Terminology for Abbreviated Terms Relating to Plastics
6、2.2 ISO Standards:ISO 4608-19844608 Homopolymers and Copolymers of Vinyl Chloride for General UseDetermination of PlasticizerAbsorption at Room Temperature33. Terminology3.1 DefinitionsDefinitions are in accordance with Terminology D883 and Terminology D1600, unless otherwise indicated.4. Summary of
7、 Test Method4.1 Asample of PVC is saturated with plasticizer in a screening tube with an amount of plasticizer equal to approximately twicethe weight of the PVC. The PVC and plasticizer are subjected to centrifugation for a specified time. A small amount of cotton isweighed into the screening tube b
8、efore weighing of the PVC to prevent PVC particles from escaping through the orifice of the tubeduring weighing and centrifugation. Plasticizer that is not absorbed by the PVC particles is removed by the centrifugation throughthe orifice of the screening tube.5. Significance and Use5.1 This test met
9、hod provides a quantitative measure of the relative plasticizer absorption of general-purpose poly(vinylchloride) resins under standard temperature conditions. Plasticizer sorption thus defined is one of the criteria useful for thedescription of the powder blend characteristics of poly(vinyl chlorid
10、e) resins.1 This test method is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic Materials(Section D20.15.08).Current edition approved Sept. 1, 2009Nov. 1, 2013. Published September 2009November 2013. Originally approve
11、d in 1975. Last previous edition approved in 20042009as D3367 - 98D3367 - 09.(2004). DOI: 10.1520/D3367-09.10.1520/D3367-13.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, re
12、fer to the standards Document Summary page on the ASTM website.3 Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http:/www.ansi.org.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indica
13、tion of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be con
14、sidered the official document.*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 States16. Apparatus and Materials6.1 Centrifuge, whose rotor turns in a horizontal plane and has a
15、n acceleration under the test conditions of 24 500 to 29 500m s 2 measured at the level of the bottom of the tube, with, if necessary, a cooling system to prevent the temperature of themixture from exceeding 30C at the end of the centrifuging for 60 min.NOTE 2It is permissible to use higher accelera
16、tion to reduce the centrifuging time, for example, 34 000 m s2 and 30 min, provided that it has beenverified that the results obtained are equivalent.6.2 Centrifuge Tubes, to fit the centrifuge used, of glass or plastic, with a conical bottom pierced by a hole of 0.8-mm diameter(see Fig. 1).NOTE 3It
17、 has been found using Fisherbrand Disposable Filter Column (Fisher HealthCare) #11-387-50, works well in this application. It isrecommended removing the filter paper before placing the cotton in the column.6.3 Plastic Sheaths (metal, polyamide, polyethylene, and so forth), with a piece of PVC pipe a
18、t the bottom to support thecentrifuge tube (see Fig. 1).6.4 Cotton Wool, pharmaceutical grade, having a DOP absorption measured under the test conditions (6.4.1) of approximately10 %.NOTE 4Alternative materials to cotton wool may be used if it can be shown that they produce equivalent results; for e
19、xample, glass wool, andPTFE-coated polyester felt.6.4.1 Measurement of DOPAbsorbed by Cotton WoolIn accordance with Section 8, carry out a test with a piece of cotton woolhaving a mass of 100 6 2 mg, but without resin. Determine the mass of DOP absorbed by the cotton wool in grams (mass m0).6.5 Di(2
20、-ethyl hexyl)phthalate (DOP).7. Conditioning7.1 The PVC and plasticizer shall be at 23 6 1C 73.4 6 1.8F(73.4 6 1.8F) and 50 6 5 %50 6 10 % relative humidity forat least 1 h before testing.7.2 Perform the centrifugation with centrifuge and test samples at 23 6 1C.8. Procedure8.1 Weigh 100 6 2 mg of c
21、otton wool and place it in the centrifuge tube, and pack it down slightly. Weigh the tube and cottonwool to the nearest 60.1 mg, m1 being the mass in grams of the prepared tube.8.2 Weigh 100 6 2 mg of the resin being tested and place it into the tube, m2 being the mass in grams of the prepared tube
22、plusresin, to the nearest 60.1 mg.NOTE 1Dimensions in millimetres.FIG. 1 Example of Centrifuge Tube and SheathD3367 1328.3 From a pipette, run into the tube 4 mL of DOP and allow it to stand for about 10 min.8.4 Place the tube in its sheath and place the sheath into one of the compartments of the ce
23、ntrifuge rotor (the other compartmentsbeing occupied by tubes containing other resin samples, all the tubes being balanced.8.5 Set the centrifuge to give an acceleration of 24 500 to 29 500 m s2 at the level of the bottom of the tube for 60 min. Ifnecessary, the cooling device shall be switched on d
24、uring centrifuging. Check that the temperature does not exceed 30C.8.6 Remove the tube from its sheath, carefully wipe it to remove any DOP on the outside, and weigh it to the nearest 0.1 mg,m3 being the mass in grams of the tube containing the resin and the absorbed DOP.9. Calculation9.1 The room t
25、emperature plasticizer absorption, reported as parts of DOP absorbed per 100 parts resin (p.h.r.)(phr) is given bythe following formula:m32m0!2m 2m22m1 3100where:m0 = mass, of DOP absorbed by cotton wool, g,m1 = mass, of centrifuge tube with cotton wool, g,m2 = mass, of centrifuge tube with resin, g
26、, 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 Bias11.1 The precision of the test method calculated by analysis of round-robin data from six laboratories is as follows:11.1.1 Repeatability Coeffi
27、cient of variation (average of replicates) within a laboratory of 3.6 %.11.1.2 Reproducibility Coefficient of variation (average of replicates) between laboratories of 8.0 %.11.2 BiasNo justifiable statement of bias can be made for this test method since the true value of the property cannot beestab
28、lished by an accepted referee method.12. Keywords12.1 DOP; plasticizer sorption; poly(vinyl chloride) resinSUMMARY OF CHANGESCommittee D20 has identified the location of selected changes to this standard since the last issue(D3367 - 98D3367 - 09(2004) that may impact the use of this standard. (Septe
29、mber(November 1, 2009)2013)(1) Reworded the ISO equivalency statementRemoved year reference from ISO document, Note 1 in accordanceand 2.2 with GuideD4968.(2) RewordedAdded 8.1Note 3 andwith 8.2.equipment recommendation.(3) Renumbered note after 6.4.(4) DeletedModified 7.1Footnote 4.: Changed 50 6 5
30、% to 50 6 10% in accordance with D618.(5) NoModify 9.1mercury references were found.: Changed (p.h.r.) to (phr).D3367 133ASTM 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 expres
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33、end. If you feel that your comments have not received a fair hearing 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.
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