ASTM D1725-2012 Standard Practice for Preparing Resin Solutions for Viscosity Measurement by Bubble Time Method《用泡沫时间法测量树脂溶液粘度的标准试验方法》.pdf

1、Designation:D172504Standard Test Method for Viscosity of ResinSolutionsDesignation: D1725 12Standard Practice forPreparing Resin Solutions for Viscosity Measurement byBubble Time Method1This standard is issued under the fixed designation D1725; the number immediately following the designation indica

2、tes the year oforiginal adoption or, in the case of 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. Scope1.1This test method covers the measurement of th

3、e viscosity of resin solutions.1.1 This practice provides instructions for preparing resin solutions viscosity measurement by bubble time method.1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.1.3 This standard does not p

4、urport to address all of the safety concerns, if any, associated with 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. For specific hazard statements, see Section

5、7.2. Referenced Documents2.1 ASTM Standards:2D154 Guide for Testing VarnishesD1545 Test Method for Viscosity of Transparent Liquids by Bubble Time MethodD6440 Terminology Relating to Hydrocarbon ResinsE691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method2.

6、2 Other Document:OSHA Regulations, 29 CFR, paragraphs 19.10.1000 and 1910.120033. Terminology3.1 For definitions related to hydrocarbon resins see Terminology D6440.4. Summary of Test Method Summary of Practice4.1 Solid resins are dissolved in organic solvents by cold-cut or hot-cut methods in the l

7、aboratory. The viscosity of suchprepared solutions, or of commercial solutions of resins is then determined by the bubble time method (Test Method D1545). Thebubble seconds are approximately equal to stokes.5. Apparatus5.1 Bath, constant-temperature, consisting of a cylindrical glass jar of about 5-

8、gal capacity, or an aquarium tank with controlscapable of maintaining the temperature at 25 6 0.1C with water as the bath medium.5.2 Bottles, 225-mL (8-oz), wide-mouth, screw cap.5.3 Cellophane, sheet, cut into 102 or 127- mm (4 or 5-in.) squares.1This test method practice is under the jurisdiction

9、of ASTM Committee D01 on Paint and Related Coatings, Materials, and Applications and is the direct responsibilityof Subcommittee D01.33 on Polymers and Resins.Current edition approved Mar. 1, 2004. Published March 2004. Originally approved in 1960. Last previous edition approved in 1962 as D172562(1

10、996)1. DOI:10.1520/D1725-04.Current edition approved July 15, 2012. Published September 2012. Originally approved in 1960. Last previous edition approved in 2004 as D1725 04. DOI:10.1520/D172512.2For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at

11、 serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3Available from U.S. Government Printing Office Superintendent of Documents, 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http:/www.access.gpo.gov.

12、1This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication 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 ed

13、itions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.4 Corks, No. 2 short taper, to fit viscosity

14、tubes.5.5 Holder for Viscosity Tubes, preferably a mechanical holder4with rack and pinion for inverting the tubes. The holder shouldbe checked with a small level and T-square to make certain it holds the tubes in an exact vertical position after being placed inthe constant-temperature bath.5.6 Bottl

15、e Shaker, preferably one which will give end-over-end agitation.5.7 Timing Device, such as a stopwatch or electric stop clock capable of being read to a precision of 0.1 s.5.8 Viscosity Tubes, of clear glass and flat bottoms, having 10.65 6 0.025-mm inside diameter and 114 6 1-mm outside length.Plai

16、nly legible lines shall be located on the tubes as follows:27 6 0.5 mm100 6 0.5 mm108 6 0.5 mmAll distances shall be measured from the bottom outside of the tube. The distance between the first and second lines shall be73 6 0.5 mm.6. Solvent6.1 The solvent used should be mutually agreed upon between

17、 the purchaser and the manufacturer. Toluene, xylene, mineralspirits, alcohols, etc., are used for the preparation of solutions of resins. For a given resin, the viscosity obtained will depend onthe solvent used. In case of dispute, both laboratories should use portions of the same batch of solvent.

18、7. Hazards7.1 Consult current OSHA regulations, suppliers Material Safety Data Sheets, and local regulations for all materials used inthis test method. practice.8. Preparation of Resin Solutions8.1 The procedure employed for dissolving solid resins will be dependent upon the chemical nature of the r

19、esin under test. Someresins will dissolve readily in cold solvent with moderate agitation, while others must be hot-cut in order to effect solution. Themethod of solution shall be agreed upon mutually between the purchaser and the seller since there may be differences in solubilityor viscosity betwe

20、en solutions prepared with and without heat. The solvent concentration may vary from 30 to 90 % and isgenerally selected to give a solution having a viscosity between 5 and 300 s. With hard resin use only material taken from freshlybroken lumps. Do not use crushed or powdered material from the resin

21、 sample container.8.2 Cold-Cut SolutionsBecause it is not easy to tell when solution of the resin is complete, proceed exactly in accordance withthe following directions, unless experience has shown that short cuts can be safely taken:8.2.1 Prepare 100 g of solution as follows: Weigh an 225-mL (8-oz

22、), screw-cap bottle, cap, and cellophane sheet to the nearest0.05 g. Weigh into the bottle to the nearest 0.05 g the appropriate amount of solvent (40 g for a 60 % solution).8.2.2 Weigh into a beaker to the nearest 0.05 g the correct amount (60 g for a 60 % solution) of the freshly crushed resin, pa

23、ssinga No. 10 (2000-m) sieve.8.2.3 Pour the resin slowly into the bottle containing the solvent, swirling gently so as to wet the resin as thoroughly as possibleas it is added. Place the cellophane sheet over the mouth of the bottle and screw on the cap tightly.8.2.4 Immediately shake vigorously by

24、hand and place on a shaker to give end-over-end agitation for an overnight period.8.2.5 Check the weight of the bottle, cap, cellophane and solution to make certain that none was lost during the mixing. Ifappreciable loss has occurred, discard the solution and prepare a fresh one.8.3 Hot-Cut Solutio

25、ns:8.3.1 Prepare 100 g of solution as follows: Weigh a 250-mL Erlenmeyer flask with a ground joint to the nearest 0.05 g. Weighinto the flask to the nearest 0.05 g the appropriate amount of solvent (40 g for a 60 % solution).8.3.2 Weigh into the flask to the nearest 0.05 g the correct amount (60 g f

26、or a 60 % solution) of the freshly crushed resin passinga No. 10 (2000-m) sieve. Connect the flask to a suitable air or water condenser and warm gently on a hot plate with swirling asnecessary to prevent any charring or scorching of the resin. Usually, the solution will be complete in 15 or 20 min.8

27、.3.3 When the solution is complete, cool the flask, disconnect, and weigh. If over 0.1 g of solvent has been lost, add thenecessary amount and swirl to mix.8.3.4 If any air bubbles are present, allow the solution to stand until they disappear.8.4 Resins Supplied in SolutionThese resins ordinarily ca

28、n be tested for viscosity as received. However, if modification isnecessary, such as a reduction to a specified solids content, use a solvent or solvent combination suitable for use with resin undertest, as agreed upon between the manufacturer and the purchaser.9. Procedure9.1 Determine the viscosit

29、y of the resin solution in accordance with Test Method D1545, repeating the timing determination4A suitable mechanical holder is available from the Gardner Laboratory, Inc., 5521 Landy Lane, Washington, DC, Item 660.4Suitable mechanical viscosity tube holders are available from various laboratory su

30、pply companies.D1725 122until three readings are obtained that agree within 10 s or 3 % relative, whichever is larger.9.2 For viscosities of solutions which have a timed bubble travel of 5 s or less, more precise results can be obtained bycomparison against reference standards having predetermined v

31、iscosity (Guide D154) or timed bubble travel (Test Method D1545).10. Report10.1 Report the following information:10.1.1 The mean bubble travel time, in seconds, as the viscosity at 25C, including:10.1.1.1 Solution concentration,10.1.1.2 Solvent used, and10.1.1.3 Whether cold- or hot-cut solutions we

32、re used.11. Precision11.1Repeatability and ReproducibilityTwo results, each the mean of three readings, should be considered suspect if they differby more than 7% relative (95% confidence level). See Practice Keywords11.1 bubble time; resin solutions; viscosityAPPENDIX(Nonmandatory Information)X1. I

33、NTERLABORATORY STUDYX1.1 An interlaboratory study using this standard practice in conjunction with Test Method D1545 was conducted when thepractice was originally approved in 1960.X1.2 Repeatability and ReproducibilityTwo results, each the mean of three readings, should be considered suspect if they

34、differ by more than 7 % relative (95 % confidence level). See Practice E691.NOTE X1.1This estimate of precision is based on an interlaboratory study.5Because the data showed no significant difference for between laboratoryand within laboratory variances, the precision estimates for repeatability and

35、 reproducibility were pooled and a single value reported. 12.Keywords12.1bubble time; resin solutions; viscosityASTM 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 advis

36、ed that determination of the validity 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 r

37、eapproved or withdrawn. Your comments 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

38、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. Individu

39、al 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).5For the results of the interlaboratory study, see Report of Committee D01, Proceedings, ASTM, Vol 60, 1960. Proceedings, ASTM Vol 60, 1960.D1725 123