1、Designation: D 2383 97 (Reapproved 2001)Standard Practice forTesting Plasticizer Compatibility in Poly(Vinyl Chloride)(PVC) Compounds Under Humid Conditions1This standard is issued under the fixed designation D 2383; the number immediately following the designation indicates the year oforiginal adop
2、tion or, in 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.1. Scope*1.1 This practice defines the conditions for the exposure andqualitative e
3、valuation of poly(vinyl chloride) (PVC) com-pounds for plasticizer compatibility under humid conditions.Change in appearance is used for judging compatibility.1.2 The text of this practice references notes and footnotesthat provide explanatory material. These notes and footnotes(excluding those in t
4、ables and figures) shall not be consideredas requirements of this practice.1.3 The values stated in SI units are to be regarded as thestandard.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 standar
5、d to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.NOTE 1There are no ISO standards covering the primary subject ofthis practice.2. Referenced Documents2.1 ASTM Standards:2D 883 Terminology Relating to PlasticsD 1249 Specif
6、ication for Octyl Ortho-Phthalate Ester Plas-ticizersD 1600 Terminology for Abbreviated Terms Relating toPlasticsD 1755 Specification for Poly(Vinyl Chloride) ResinsE 145 Specification for Gravity-Convection and Forced-Ventilation Ovens3. Terminology3.1 GeneralDefinitions are in accordance with Term
7、inol-ogy D 883 and abbreviations with Terminology D 1600, unlessotherwise indicated.4. Summary of Practice4.1 Specimens are suspended over water in closed contain-ers and aged at either 60C (140F) or 80C (176F). Thespecimens are removed from the containers at specified inter-vals and their appearanc
8、e is rated in accordance with 9.1 andrecorded.5. Significance and Use5.1 This practice provides an accelerated method for deter-mining the stability of PVC compounds with respect toplasticizer compatibility under humid conditions.5.2 The temperatures and humidity employed in this test canrepresent a
9、ctual use conditions, but are intended primarily forrating materials.6. Apparatus6.1 Screw-Cap Glass Jars or Capped Metal Containers,large enough to avoid contact between specimens. The coversshall be provided on the inside with hooks of a corrosion-resistant metal such as stainless steel, nichrome
10、or nickel.6.2 Forced-Ventilation Laboratory Oven, Type II, Grade A,in accordance with Specification E 145.7. Specimen Preparation (Note 2)7.1 Cut test specimens with one side having a surface areaof 25 cm2from a 0.75-mm (0.029-in.) thick smooth surfaceplastic sheet (60.05 mm (0.002-in.) Punch a smal
11、l hole nearthe edge for hanging the specimen.NOTE 2For use as a control in testing the relative performance ofplasticizers, the following clear formulation may be employed.PartsGeneral-Purpose PVC Resin:Type GP 40000 as defined in Specification D 1755. 100Plasticizer:Di-2-ethylhexyl phthalate (Speci
12、fication D 1249) 50Stabilizer:Coprecipitated solid barium-cadmium laurate (barium:cadmium 2:1)17.2 Process the test compound in the usual manner on atwo-roll mill for 5 min at the appropriate temperature for theplasticizer used (170C (338F) for Di-2-ethylhexyl phthalate).Cut test specimens from the
13、compound sheeting prepared by1This practice is under the jurisdiction ofASTM Committee D20 on Plastics andis the direct responsibility of Subcommittee D20.15 on Thermoplastic Materials(Section D20.15.11).Current edition approved July 10, 1997. Published April 1998. Originallypublished as D 2383 69.
14、Last previous edition, D 2383 92.2For 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 standards Document Summary page onthe ASTM website.1*A Summary of Changes secti
15、on appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.pressing the milled sheet in a suitable mold at 10.3 MPa (1500psi) for 5 min at 5 to 10C (9 to 18F) higher than the millingtemperature.NOTE 3The te
16、st compound suggested in Note 2 will not exude undereither test temperature specified in 8.2.8. Procedure8.1 Suspend the specimens from hooks over distilled waterin closed containers so that they do not touch the water layer,sides of the container, or each other.8.2 Place the containers in the circu
17、lating-air oven (see 6.2)at either 60 6 1C (140 6 2F) or 80 6 1C (176 6 2F),depending upon which temperature is specified in the appli-cable material specification. Put covers on loosely until thecontainers come to temperature equilibrium, then tightencovers.8.3 Remove the containers from the oven a
18、t specifiedintervals. Under normal inspection, the intervals for plasticizedPVC are:8.3.1 At 60C, once a week for a total of 4 weeks.8.3.2 At 80C, 1, 3, 7, 10, and 14 days.8.4 Examine the specimens for evidence of exudation andrecord their appearance.8.5 Replace the specimens in the original contain
19、ers andcontinue the test for the specified period of time.9. Ratings9.1 The following visual and tactile ratings are used forjudging plasticizer compatibility:9.1.1 None (Dry)No evidence of exudation.9.1.2 Slight (Tacky)Slight exudation resulting in a stickyspecimen surface.9.1.3 Moderate (Greasy)Th
20、in film of exuded plasticizercovers specimen surface. Film may be greasy, oily, or waxy.9.1.4 Heavy (Wet)Droplets of exuded plasticizer accu-mulated on specimen surface. Specimen may be blistered.10. Report10.1 The report shall include the following:10.1.1 Sample identification,10.1.2 Temperature of
21、 test, and10.1.3 Rating and appearance of the specimen at the end ofeach test interval.11. Precision and Bias11.1 No precision and bias data are available due to subjec-tive nature of determining the test results.12. Keywords12.1 plasticizer; poly(vinyl chloride) (PVC)SUMMARY OF CHANGESThis section
22、identifies the location of selected changes to this practice. For the convenience of the user,Committee D20 has highlighted those changes that may impact the use of this practice. This section may alsoinclude descriptions of the changes or reasons for the changes, or both.D 2383 97 (Reapproved 2001)
23、:(1) Five year reapproval without any changes.D 2383 97:(1) Section 1.2 added.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 valid
24、ity of any such patent rights, 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 comme
25、nts are invited either for 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 n
26、ot 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. 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 2383 97 (2001)2
