1、Designation: D 1583 01Standard Test Method forHydrogen Ion Concentration of Dry Adhesive Films1This standard is issued under the fixed designation D 1583; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A
2、 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. Scope1.1 This test method covers determination of the hydroge
3、nion concentration (pH), acidity, or alkalinity, of organic adhe-sives in the cured dry film form. This test method is notdesigned to apply to pressure-sensitive adhesives.1.2 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.1.3
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 and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Docu
5、ments2.1 ASTM Standards:D 907 Terminology of Adhesives2E 70 Test Method for pH of Aqueous Solutions With theGlass Electrode33. Terminology3.1 Definitions Many of the terms in this test method aredefined in Terminology D 907.4. Summary of Test Method4.1 Collect samples of the adhesive to be tested wi
6、th anyhardener necessary.4.2 Dry adhesive films are prepared.4.3 The adhesive films are ground and mixed with distilledwater.4.4 The pH is determined using a pH meter in accordancewith Test Method E 70.5. Significance and Use5.1 The pH of an adhesive may be a factor whereby theadherends or the adhes
7、ive itself may be adversely affected intime by the acidity or alkalinity.6. Apparatus6.1 pH Meter, capable of making measurements to 60.05pH.6.2 Glass Vial, capable of properly immersing the electrodeof the pH meter when filled with the specified test solution.6.3 Distilled Water, with a pH between
8、5.6 and 7.0 at 23 61C (73.4 6 1.8F).6.4 Glass Sheet, free from scratches, approximately 200 by250 mm (8 by 10 in.) in size for use in oven.6.5 Circulating-Air Oven, capable of maintaining tempera-tures of 23 6 1C (73.4 6 1.8F) to 150 6 1C (302 6 1.8F).7. Sampling7.1 Except in special cases, take a c
9、omposite sample whenpossible from three or more separate containers, chosen atrandom. Also take samples from containers which appear to benonrepresentative, and test such samples separately. Place thesamples immediately in airtight glass containers filled toprevent excessive air space above the adhe
10、sive and transportthem to the testing laboratory in these containers. Takeprecautions to reduce evaporation or drying to a minimum.Thoroughly mix the adhesive in the container if there is atendency for the materials to separate before a sample is taken.Use the required catalysts and hardeners from t
11、he sameshipment as the other adhesive components if the componentsare furnished as a unit by the adhesive manufacturer.8. Test Specimens8.1 Room-Temperature Setting AdhesivesUse adhesivesthat form dry films at room temperature and mix in accordancewith the recommendations of the adhesive manufacture
12、r.Spread the adhesive on glass or other inert material to whichthe adhesive does not adhere to a film thickness of less than0.51 mm (0.020 in.) and allow it to dry at 23 6 1C (73.4 61.8F).8.2 Elevated-Temperature Setting AdhesivesMix adhe-sives that require heat to form a dry film in accordance with
13、 therecommendations of the manufacturer. Prepare a film of theadhesive on glass or other inert material to which the adhesivedoes not adhere, and cure it in accordance with the recommen-dations of the manufacturer. The adhesive film should be lessthan 0.51 mm (0.020 in.) in thickness. In the absence
14、 ofspecific recommendations for curing the adhesive, place thefilms on the glass plates in a circulating-air oven at 66 6 1C1This test method is under the jurisdiction of ASTM Committee D14 onAdhesives and is the direct responsibility of Subcommittee D14.30 on WoodAdhesives.Current edition approved
15、March 10, 2001. Published May 2001. Originallypublished as D 1583 58. Last previous edition D 1583 00.2Annual Book of ASTM Standards, Vol 15.06.3Annual Book of ASTM Standards, Vol 15.05.1Copyright ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.(1506 1.8F) until most of
16、the solvent is evaporated; thisusually requires 4 h. Then raise the temperature to 150 6 1C(302 6 1.8F) and continue to heat the films until cured. Thisprocess usually requires less than 1 h.8.3 Grind the adhesive specimen so that all the particlespass through a No. 40 (425-m) sieve.8.4 Test at leas
17、t three specimens from each sample.9. Procedure9.1 Immediately after grinding, weigh2goramultiplethereof of the ground particles, and place them in a smallstandard-size glass vial that will permit adequate immersion ofthe electrode when the 10 mL, or a multiple thereof, of freshlyboiled, cooled dist
18、illed water is added. Maintain the ratio ofpowder to water at 1 to 5. Stir the mixture thoroughly. Tightlyseal the container with a rubber stopper at all times exceptwhen pH determinations are being made. Allow the suspensionof ground particles to stand for 72 h at room temperature. Thenstir the sol
19、ution and determine the pH by means of a suitablepH meter. Standardize the pH meter in accordance with theinstructions of the manufacturer of the instrument or, in theabsence of such instructions, in accordance with Test MethodE 70. Repeat the determination at intervals of 24 h thereafteruntil the d
20、ifference between consecutive readings is not greaterthan 0.05 pH units. Record the last readings as the equilibriumfilm pH value of the adhesive.9.2 Measure the pH at 23 6 1C (73.4 6 1.8F).10. Report10.1 Report the following information:10.1.1 Complete identification of the adhesive tested includ-i
21、ng type, catalyst, hardener, source, lot number, condition, andso forth,10.1.2 The pH of the distilled water used, and10.1.3 The pH and the time required to reach equilibrium ofeach test specimen.11. Precision and Bias11.1 The standard deviation of the average (based on threespecimens) obtained by t
22、he same analyst on different days wasestimated to be 0.02 pH unit relative at 53 df. Two suchaverages should be considered suspect (95 % confidence level)if they differ by more than 0.06 pH unit.11.2 Reproducibility (Multilaboratory)The standard de-viation of results (each the average of duplicate d
23、etermina-tions) obtained by analysts in different laboratories has beenestimated to be 0.04 pH unit at 12 df. Two such averagesshould be considered suspect (95 % confidence level) if theydiffer by more than 0.12 pH unit.12. Keywords12.1 adhesive films; pHThe American Society for Testing and Material
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25、wn 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 revision of this standard or for additional standardsand should be a
26、ddressed to ASTM Headquarters. Your comments will receive careful consideration at a meeting of the responsibletechnical committee, which you may attend. If you feel that your comments have not received a fair hearing you should make yourviews known to the ASTM Committee on Standards, at the address
27、 shown below.This standard is copyrighted by ASTM, 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 above address or at610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website (www.astm.org).D 15832
