ASTM D1045-1995(2001) Standard Test Methods for Sampling and Testing Plasticizers Used in Plastics《塑料用增塑剂的取样的标准试验方法》.pdf

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1、Designation: D 1045 95 (Reapproved 2001)Standard Test Methods forSampling and Testing Plasticizers Used in Plastics1This standard is issued under the fixed designation D 1045; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the yea

2、r 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. Scope1.1 These test methods cover sampling and testing of liquidplasticizers used in compounding of plastics. Acid number

3、,ester content, specific gravity, color, refractive index, and watercontent are determined.1.2 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety concerns, if any, ass

4、ociated 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. Specific hazardsinformation is given in Section 5.NOTE 1There is no similar or equivalent ISO stan

5、dard.2. Referenced Documents2.1 ASTM Standards:D 70 Test Method for Density of Semi-Solid BituminousMaterials Pycnometer Method2D 287 Test Method for API Gravity of Crude Petroleum andPetroleum Products (Hydrometer Method)3D 792 Test Methods for Density and Specific Gravity (Rela-tive Density) of Pl

6、astics by Displacement4D 883 Terminology Relating to Plastics4D 1193 Specification for Reagent Water5D 1600 Terminology for Abbreviated Terms Relating toPlastics4D 1807 Test Methods for Refractive Index and SpecificOptical Dispersion of Electrical Insulating Liquids6D 3465 Practice for Purity of Mon

7、omeric Plasticizers byGas Chromatography7D 4052 Test Method for Density and Relative Density ofLiquids by Digital Density Meter8E 1 Specification for ASTM Thermometers9E 203 Test Method for Water Using Volumetric Karl FischerTitration103. Terminology3.1 DefinitionsDefinitions are in accordance with

8、Termi-nology D 883 and Terminology D 1600, unless otherwiseindicated.4. Significance and Use4.1 These test methods may be used in establishing andconfirming quality control standards for liquid plasticizers usedin the compounding of plastics.5. Hazards5.1 Chemical Hazard of ReagentsSome of the chemi

9、calsused in this test method may be hazardous. Accepted labora-tory safety procedures must be followed. See suppliers mate-rial safety data sheets for further information.6. Sampling6.1 The method of sampling specified in 6.2 or 6.3 shall beused, according to the special conditions that exist.6.2 Fr

10、om Loaded Tank Car or Other Large VesselThecomposite sample taken shall be not less than 2 L (12 gal) andshould consist of small samples of not more than 1 L (1 qt)each, taken from near the top and bottom by means of a metalor glass container with removable stopper or top. This device,attached to a

11、suitable pole, shall be lowered to the desireddepth, when the stopper or top shall be removed and thecontainer allowed to fill. A bomb sampler attached to a chain isconvenient to use; the opening should be adjusted so that thebomb will fill on the way down.6.3 From Barrels and DrumsAt least5%ofthepa

12、ckagesin any shipment shall be represented in the sample. Thepurchaser may increase the percentage of packages to besampled at his discretion; in the case of plasticizers that arepurchased in small quantity, each package may be sampled and1These methods are under the jurisdiction of ASTM Committee D

13、20 on Plasticsand are the direct responsibility of Subcommittee D20.15 on ThermoplasticsMaterials (Section D20.15.11 on Plasticizers).Current edition approved March 15, 1995. Published May 1995. Originallypublished as D 1045 49 T. Last previous edition D 1045 86 (1990)e1.This edition contains change

14、s in Section 1 to include an ISO equivalencystatement.2Annual Book of ASTM Standards, Vol 04.03.3Annual Book of ASTM Standards, Vol 05.01.4Annual Book of ASTM Standards, Vol 08.01.5Annual Book of ASTM Standards, Vol 11.01.6Annual Book of ASTM Standards, Vol 10.03.7Annual Book of ASTM Standards, Vol

15、08.02.8Annual Book of ASTM Standards, Vol 05.03.9Annual Book of ASTM Standards, Vol 14.03.10Annual Book of ASTM Standards, Vol 15.05.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.analyzed, if desired. A portion shall be withdrawn f

16、rom nearthe center of each package sampled by means of a “thief” orother sampling device and composited. The composite samplethus obtained shall be not less than 1 L (1 qt) and shall consistof equal portions of not less than 250 mL (12 pt) from eachpackage sampled.7. Purity of Reagents7.1 Purity of

17、ReagentsReagent-grade chemicals shall beused in all tests. Unless otherwise indicated, it is intended thatall reagents shall conform to the specifications of the Commit-tee on Analytical Reagents of the American Chemical Society,where such specifications are available.11Other grades may beused, prov

18、ided it is first ascertained that the reagent is ofsufficiently high purity to permit its use without lessening theaccuracy of the determination.7.2 Unless otherwise indicated, references to water shall beunderstood to mean reagent water conforming to SpecificationD 1193.ACID NUMBER8. Thermometers8.

19、1 All temperature measurements shall be made withASTM thermometers of suitable range, accurate to within0.1C and conforming to the requirements prescribed inSpecification E 1.9. Reagents9.1 AlcoholDenatured alcohol, Formula No. 3A of the U.S. Bureau of Alcohol, Tobacco, and Firearms.9.2 Alkali, Stan

20、dard Solution ( 0.01 N)Prepare and stan-dardize a 0.01 N aqueous solution of sodium hydroxide(NaOH) or a 0.01 N alcoholic solution of potassium hydroxide(KOH).9.3 Alkali, Standard Solution (0.1 N)Prepare and stan-dardize a 0.1 N aqueous solution of sodium hydroxide (NaOH)or a 0.1 N alcoholic solutio

21、n of potassium hydroxide (KOH).9.4 Acetone.9.5 Bromthymol Blue Indicator Solution.10. Procedure10.1 Weigh 25 g of the sample into a 125-mL Erlenmeyerflask and dissolve in 50 mL of alcohol. If the sample is notcompletely soluble in alcohol, use 50 mL of a mixture of equalparts of alcohol and acetone.

22、 With certain samples it may benecessary first to add 25 mL of acetone, warm to effectsolution, and then add 25 mL of alcohol.10.2 Add a few drops of bromthymol blue indicator solutionand titrate with 0.01 N NaOH or KOH solution. If the titrationexceeds 10 mL, repeat the determination using 0.1 N Na

23、OH orKOH solution.10.3 BlankMake a blank titration on 50 mL of the solventused to dissolve the sample.11. Calculation11.1 Calculate the acid number, expressed as milligrams ofKOH per gram of sample, as follows:Acid number 5 A 2 B!N3 56.1#/C (1)where:A = NaOH or KOH solution required for titration of

24、 thesample, mL,B = NaOH or KOH solution required for titration of theblank, mL,N = normality of the NaOH or KOH solution, andC = sample used, g.11.2 If desired, in the case of esters, the results may beexpressed as a percentage by weight of the appropriate acid, byusing the proper factor in the equa

25、tion in 11.1.ESTER CONTENTTITRIMETRIC12. Reagents12.1 Bromthymol Blue Indicator Solution.12.2 Hydrochloric Acid, Standard (0.5 N)Prepare and stan-dardize a 0.5 N aqueous solution of hydrochloric acid (HCI).12.3 Potassium Hydroxide, Standard Solution (0.5 N)Prepare and standardize a 0.5 N alcoholic s

26、olution of potassiumhydroxide (KOH).13. Procedure13.1 Weigh accurately about2gofthesample into a250-mL Erlenmeyer flask with ground-glass joint. By means ofa constant delivery pipet or buret, add 50 mL of 0.5 N KOHsolution. Connect to a water-cooled condenser with ground-glass joint and reflux for a

27、 period of 1 to 4 h, depending on theester being tested, or until saponification is complete.13.2 After the apparatus has cooled, wash down the con-denser with water and disconnect. Add a few drops ofbromthymol blue indicator solution to contents of the flask andtitrate with 0.5 N HCl.13.3 BlankRun

28、a blank, containing 50 mL of the 0.5 NKOH solution, along with the sample.14. Calculation14.1 Calculate the ester content, expressed in milligrams ofKOH per gram of sample, as follows:Ester content 5 D 2 E!N 3 56.1#/G 2 F (2)where:D = HCl required for titration of the blank, mL,E = HCl required for

29、titration of the sample, mL,F = correction for acidity of sample (Section 11),N = normality of the HCl, andG = sample used, g.14.2 If desired, the results may be expressed as a percentageof the appropriate ester by weight, by using the proper factor inthe equation in 14.1.11Reagent Chemicals, Americ

30、an Chemical Society Specifications, AmericanChemical Society, Washington, DC. For suggestions on the testing of reagents notlisted by the American Chemical Society, see Analar Standards for LaboratoryChemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeiaand National Formulary,

31、U.S. Pharmaceutical Convention, Inc. (USPC), Rockville,MD.D 10452ESTER CONTENTGAS CHROMATOGRAPHY15. Procedure15.1 The ester content may be determined using PracticeD 3465.SPECIFIC GRAVITY16. Selection of Test Method16.1 Specific gravity may be determined using a hydrometer(Test Method D 287), Westph

32、al balance, pycnometer (Section17) or Digital Density Meter (Test Method D 4052). Extremelyviscous samples may be tested by Test Methods D 792 or TestMethod D 70.17. Procedure Using Pycnometer17.1 Determine the weight capacity of the pycnometer withwater at 23 6 1C. Fill this standardized pycnometer

33、 with aportion of the sample that has been cooled to approximately20C. Insert the thermometer or capillary tube, taking care toavoid introduction of air bubbles. Set the pycnometer in aconstant-temperature water bath maintained at 23 6 1C (73.46 1.8F) for a period of at least 30 min. Remove the drop

34、let ofsample from the overflow capillary and cover with the glasscap. Clean the outside of the pycnometer and weigh.18. Calculation18.1 Calculate the specific gravity as follows:Specific gravity at 23/23C 5 A/B (3)where:A = grams of sample used, andB = water capacity of pycnometer in grams.COLOR19.

35、Application19.1 Useful comparisons between the color of relativelylight colored plasticizers and platinum-cobalt standards may bemade for colors in the range from 0 to 200, as defined inSection 20.20. Preparation of Color Standards1220.1 Dissolve 1.245 g of potassium chloroplatinate (K2PtCl6), conta

36、ining 0.5 g of platinum, and1gofcrystallizedcobaltous chloride (CoCl26H2O), containing about 0.248 g ofcobalt, in water containing 100 mL of HCl (sp gr 1.19). Diluteto 1 L with water to prepare a solution having a color of 500.This solution, already prepared, may be purchased fromlaboratory supply h

37、ouses.20.2 To prepare standards having colors of 5, 10, 15, etc.,dilute 0.5, 1.0, 1.5 mL, etc., of the solution described in 20.1with water to 50 mL in standard Nessler tubes. If 100-mLstandard Nessler tubes are used, dilute 1.0, 2.0, 3.0 mL, etc., to100 mL with water to obtain colors of 5, 10, 15,

38、etc. Protect thetubes from evaporation and from dust when not in use. Ifdesired, commercially available platinum-cobalt standards inNessler tubes or colored glass disks with proper spectraltransmission may be used, provided they are first checkedagainst standards prepared from K2PtCl6and CoCl26H2Oas

39、described above.21. Procedure21.1 Fill a 50 or 100-mL Nessler tube with the sample andcompare with the standards by holding side by side and lookingdown through the columns of liquid at a matte white surfaceilluminated by northern daylight.22. Apparatus22.1 RefractometerAn Abbe refractometer with sc

40、alegraduated directly in terms of refractive index of the D line ofsodium at a temperature of 23C.22.2 Water SupplyA water supply, the temperature ofwhich may be varied.REFRACTIVE INDEX23. Procedure23.1 The refractive index may be measured using theappropriate routine or precision method from Test M

41、ethodD 1807 or the method given in Sections 22 and 24.24. Procedure24.1 Place the refractometer in front of a suitable source oflight (either daylight or electric light), insert the thermometer,and adjust the circulation of water so as to bring the prisms tothe desired temperature (usually 23C (73.4

42、F). Clean withalcohol and wipe dry. Spread a drop of the liquid to be testedupon the lower prism and clamp the prisms together. Adjust themirror so that the light enters the telescope. Focus the eyepieceon the cross-hairs and the reading lens of the scale. Uponmoving the prism arm, a position can no

43、w be found where thelower part of the field is dark and the upper part light. Ingeneral, the borderline will be colored. Correct by turning themilled head on the right of the telescope so that a sharp blackand white edge is obtained. Move the prism arm until this blackedge just crosses the intersect

44、ion of the cross-hairs. Read therefractive index from the scale, estimating the fourth decimalplace.24.2 The accuracy of the instrument may be checked by asmall test plate of known refractive index, which is suppliedwith the refractometer. Attach this test plate to the upper prismwith a liquid of hi

45、gh refractive index (usually monobro-monaphthalene). Errors may be corrected by means of a smalladjusting screw.WATER CONTENT25. Procedure25.1 The water content may be measured using Test MethodE 203.12The preparation of these platinum-cobalt color standards was originallydescribed by Hazen, A., Ame

46、rican Chemical Journal, Vol 14, 1892, 300. Thedescription given in these methods is substantially identical with that given in theStandard Methods for the Examination of Water and Sewage. Am. Public HealthAssn., Ninth Edition, p. 14. A description of these standards is also given by Scott,W. W., Sta

47、ndard Methods of Chemical Analyses. Fifth Edition, Vol 2, p. 2048.D 1045326. Precision and Bias26.1 Precision and bias statements are an integral part ofreferenced test procedures used in this test method. Thesestatements are to be considered applicable to test resultsobtained by use of this test me

48、thod.26.2 Attempts to develop precision and bias statements forAcid Number, Ester Content-Titrimetric, Specific Gravity-Pycnometer, Color, and Refractive Index by the procedure inSection 22 have not been successful. For this reason, data onprecision and bias cannot be given. Anyone wishing to partic

49、i-pate in the development of precision and bias data shouldcontact the ASTM headquarters.27. Keywords27.1 plasticizer; plasticizer acid number; plasticizer color;plasticizer ester content; plasticizer refractive index; sampling;test methodsASTM 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 rights, and the riskof infringement of such rights, are entirely their