1、BRITISH STANDARDBS EN 542:2003Incorporating corrigendum no. 1Adhesives Determination of densityThe European Standard EN 542:2003 has the status of a British StandardICS 83.180g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3
2、g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 542:2003This British Standard was published under the authority of the Standards Policy and Strategy Committee on 9 May 2003 BSI 2007ISBN 0 580 41794 8National forewordThis British Standard was published by BSI. It is t
3、he UK implementation of EN 542:2003. It supersedes BS EN 542:1995 which is withdrawn. Together with BS EN 543:2003, it supersedes BS 5350-B1:1978 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee PRI/52, Adhesives.A list of organizations represented on P
4、RI/52 can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since publi
5、cationAmd. No. Date Comments16855 Corrigendum No. 131 January 2007 Revision of supersession detailsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 542April 2003ICS 83.180 Supersedes EN 542:1994English versionAdhesives - Determination of densityAdhsifs - Dtermination de la masse volumique Klebstoff
6、e - Bestimmung der DichteThis European Standard was approved by CEN on 14 February 2003.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists
7、 and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibili
8、ty of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Hungary, Iceland, Ireland, Italy, Luxembourg, Malta,
9、 Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and UnitedKingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2003 CEN All rights of exploitation in any form and by any m
10、eans reservedworldwide for CEN national Members.Ref. No. EN 542:2003 EEN 542:2003 (E)2ContentspageForeword31 Scope 42 Normative references 43 Terms and definitions54 Principle55 Safety 56 Apparatus .57 Sampling.68 Procedure for liquid adhesives 69 Procedure for solid, pasty or very viscous adhesives
11、 710 Precision.811 Test report 8EN 542:2003 (E)3ForewordThis document (EN 542:2003) has been prepared by Technical Committee CEN/TC 193 “Adhesives“, thesecretariat of which is held by AENOR.This document shall be given the status of a national standard, either by publication of an identical text or
12、byendorsement, at the latest by October 2003, and conflicting national standards shall be withdrawn at the latest byOctober 2003.This document supersedes EN 542:1994.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to impleme
13、nt this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,Slovakia, Spain, Sweden, Switzerland and the United Kingdom.EN 542:2003 (E)41 ScopeThis European Standard defines
14、two methods for the determination of density which are applicable to alladhesives.One procedure is used for adhesives in liquid form and the other one for solid, very viscous or pasty adhesives.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from o
15、ther publications. Thesenormative references are cited at the appropriate places in the text and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or
16、revision. For undated references the latest edition of thepublication referred to applies (including amendments).EN 923:1998, Adhesives Terms and definitionsEN 1066, Adhesives SamplingEN 1067, Adhesives Examination and preparation of samples for testingEN 542:2003 (E)53 Terms and definitionsFor the
17、purposes of this European Standard, the terms and definitions given in EN 923:1998 apply.4 PrincipleThe density (mass of a volume unit) of the sample is measured at 23C as the ratio of the mass of the givenvolume of adhesive to the mass of the same volume of a reference liquid having a known density
18、 multiplied by itsdensity.5 SafetyPersons using this standard shall be familiar with normal laboratory practice.This standard does not purport to address all safety problems, if any, associated with its use.It is the responsibility of the user to establish safety and health practices and to ensure c
19、ompliance with anyEuropean or national regulatory conditions.6 Apparatus6.1 GeneralUsual laboratory apparatus including the following.6.2 A glass pyknometer having a volume between 20 ml and 100 ml. Suitable pyknometers are Hubbard or Gay-Lussac types (see Figure 1).Metal pyknometers may be used as
20、an alternative.1 Gay-Lussac pyknometer;2 Hubbard pyknometerFigure 1 Suitable pyknometersEN 542:2003 (E)66.3 Thermometer graduated in divisions of 0,1C and accurate to 0,2C.6.4 Constant-temperature water bath capable of maintaining a temperature within 0,5C of the test temperature.6.5 Analytical bala
21、nce accurate to 0,1 mg.7 SamplingTake a representative sample of the adhesive to be tested in accordance with EN 1066 and examine and prepare itfor testing as described in EN 1067.8 Procedure for liquid adhesives8.1 Clean the pyknometer (6.2) thoroughly. Rinse it with water and a solvent leaving no
22、residue on evaporation.Dry it.8.2 Condition the clean dry pyknometer at (23 0,5)C in the water bath (6.4) until equilibrium has been attained,dry the outside of the pyknometer and weigh it (m0). If maximum accuracy is required, the cleaning, drying andweighing shall continue until the difference bet
23、ween two successive weighings does not exceed 0,5 mg.8.3 Fill the pyknometer with freshly distilled water at (23 1)C and place the filled pyknometer in the water bath at(23 0,5)C to reach equilibrium. Remove the pyknometer from the water bath, dry the outside of the pyknometerand reweigh to the near
24、est 0,1 mg (m1).8.4 Fill the clean dry pyknometer with the adhesive and clean any residue of adhesive from the outside of thepyknometer by wiping with absorbent material moistened with a suitable solvent and thoroughly dry by wiping withclean absorbent material.8.5 Place the filled pyknometer in the
25、 water bath at (23 0,5)C for at least half an hour to reach equilibrium.Remove the pyknometer from the water bath and thoroughly dry by wiping with clean absorbent material.Reweigh the pyknometer to the nearest 0,1 mg (m2).8.6 Expression of resultsCalculate the density (in grams per cubic centimetre
26、) of the adhesive at the test temperature by means of equation1:r = 5 rw(1)where:is the density of the adhesive at the test temperature;m0is the mass (in grams) of the empty pyknometer;m1is the mass (in grams) of the pyknometer plus the water;m2is the mass (in grams) of the pyknometer and test sampl
27、e;w is the density of the water in grams per cubic centimetre at the test temperature.NOTE The density of water at 23 C can be taken as 0,9975 g/cm3m2 m0m1 m0EN 542:2003 (E)79 Procedure for solid, pasty or very viscous adhesives9.1 Clean the pyknometer (6.2) thoroughly. Rinse with water and a solven
28、t leaving no residue on evaporation. Dryit.9.2 Condition the clean dry pyknometer at (23 0,5) C in the water bath (6.4) until equilibrium has been attained,dry the outside of the pyknometer and weigh it (m0). If maximum accuracy is required, the cleaning, drying andweighing shall continue until the
29、difference between two successive weighings does not exceed 0,5 mg.9.3 Fill the pyknometer with a liquid having a known density ( lv). The liquid shall react in no way with the adhesiveto be tested and shall not dissolve it.Place the filled pyknometer in the water bath at (23 0,5) C to reach equilib
30、rium. Remove the pyknometer fromthe water bath, dry the outside of the pyknometer and reweigh to the nearest 0,1 mg (m1).9.4 Empty the pyknometer, clean and dry it thoroughly. Place about 5 g of the solid adhesive to be tested into thepyknometer and weigh it (m2).9.5 Fill the pyknometer containing t
31、he solid sample with the liquid of known density lv. Place the filled pyknometerin the water bath at (23 0,5)C for at least half an hour to reach the equilibrium. Remove the pyknometer from thewater bath and thoroughly dry by wiping with clean absorbent material.Reweigh the pyknometer to the nearest
32、 0,1 mg (m3).9.6 Expression of resultsCalculate the density (in grams per cubic centimetre) of the adhesive at the test temperature by means of equation2:lv(2)where:is the density of the adhesive at the test temperature;m0is the mass (in grams) of the empty pyknometer;m1is the mass (in grams) of the
33、 pyknometer plus the liquid of density lv;m2is the mass (in grams) of the pyknometer and the solid test sample;m3is the mass (in grams) of the pyknometer filled with the solid test sample and liquid of density lv;lvis the density (in grams per cubic centimetre) of the reference liquid.EN 542:2003 (E
34、)810 PrecisionWhen this method is used with the test temperature controlled to within 0,5C, the following levels of precisionshould be obtained.a) Repeatability. The difference between results obtained by the same operator with the same apparatus underconstant operating conditions on identical test
35、material should not exceed 0,001 g/cm3.b) Reproducibility. The difference between two results obtained by different operators in different laboratories onidentical test material should not exceed 0,001 g/cm3.11 Test reportThe test report shall include:a) reference to this European Standard;b) type a
36、nd designation of the adhesive tested;c) test temperature;d) result of the test i.e. the individual results and the mean where appropriate;e) any modification to the procedure described and any circumstances which can have affected the results;f) date of the test.blankBS EN 542:2003BSI389 Chiswick H
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