1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58dependence of shear strengthICS 83.180Adhesives Determination of temperature BRITISH STANDARDBS ISO
2、 19212:2006BS ISO 19212:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 September 2006 BSI 2006ISBN 0 580 48999 XAmendments issued since publicationAmd. No. Date Commentscontract. Users are responsible for its correct application.Compl
3、iance with a British Standard cannot confer immunity from legal obligations.National forewordThis British Standard was published by BSI. It is the UK implementation of ISO 19212:2006.The UK participation in its preparation was entrusted to Technical Committee PRI/52, Adhesives. A list of organizatio
4、ns represented on PRI/52 can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a INTERNATIONALSTANDARDISO19212First edition2006-08-15Reference numberISO 19212:2006(E)Adhesives Determination of temperature dependence of shear strength
5、Adhsifs Dtermination de la rsistance au cisaillement en fonction de la tempratureBS ISO 19212:2006iiiiiContents Page1 Scope 12 Normative references 13 Terms and definitions 14 Methods of test for shear strength . 24.1 Test method for metals . 24.2 Test method for wood . 25 Test atmosphere 26 Samplin
6、g and handling of adhesives 27 Kinds of adhesive and surface preparation of adherends 28 Preparation of test specimens . 28.1 Metal adherends 28.2 Wood adherends . 29 Procedure . 210 Expression of results 310.1 Plot of shear strength versus temperature . 310.2 Failure patterns . 311 Test report 3Ann
7、ex A (informative) Practical information on the test method . 5Bibliography . 7BS ISO 19212:2006ivForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies(ISO member bodies). The work of preparing International Standards is normally carr
8、ied out through ISOtechnical committees. Each member body interested in a subject for which a technical committee has beenestablished has the right to be represented on that committee. International organizations, governmental andnon-governmental, in liaison with ISO, also take part in the work. ISO
9、 collaborates closely with the InternationalElectrotechnical Commission (IEC) on all matters of electrotechnical standardization.International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International
10、Standards. Draft International Standardsadopted by the technical committees are circulated to the member bodies for voting. Publication as anInternational Standard requires approval by at least 75 % of the member bodies casting a vote.Attention is drawn to the possibility that some of the elements o
11、f this document may be the subject of patentrights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 19212 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 11, Products.BS ISO 19212:20061Adhesives Determination of temperature dependence of s
12、hear strengthSAFETY STATEMENT Persons using this document should be familiar with normal laboratorypractice, if applicable. This document does not purport to address all of the safety problems, if any,associated with its use. It is the responsibility of the user to establish appropriate safety and h
13、ealthpractices and to ensure compliance with any regulatory requirements.1ScopeThis International Standard specifies methods for determining the temperature dependence of the shearstrength of the adhesive or adhesive bond in adhesively bonded products.2 Normative referencesThe following referenced d
14、ocuments are indispensable for the application of this document. For datedreferences, only the edition cited applies. For undated references, the latest edition of the referenced document(including any amendments) applies.ISO 291, Plastics Standard atmospheres for conditioning and testingISO 472, Pl
15、astics VocabularyISO 4587, Adhesives Determination of tensile lap-shear strength of rigid-to-rigid bonded assembliesISO 6238, Adhesives Wood-to-wood adhesive bonds Determination of shear strength by compressiveloadingISO 10365, Adhesives Designation of main failure patternsISO 15605, Adhesives Sampl
16、ingISO 17212, Structural adhesives Guidelines for the surface preparation of metals and plastics prior toadhesive bonding3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 472 and the following apply.3.1 temperature dependence of shear strength in adhesi
17、ve bondsproperty capable of being measured by determining the shear strength of test specimens at varioustemperatures and recording the changesBS ISO 19212:200624 Methods of test for shear strength4.1 Test method for metalsFor adherends made of metal, the shear strength shall be determined in accord
18、ance with ISO 4587.4.2 Test method for woodFor adherends made of wood, the shear strength shall be determined in accordance with ISO 6238.5 Test atmosphereThe specimens shall be conditioned and tested in one of the standard atmospheres specified in ISO 291.6 Sampling and handling of adhesivesThe met
19、hod used for sampling and for handling the adhesives shall be in accordance with ISO 15605.7 Kinds of adhesive and surface preparation of adherendsSee ISO 17212.8 Preparation of test specimens8.1 Metal adherendsThe test joints may be prepared either individually or from adhesively bonded panels, in
20、each case following theprocedure specified in ISO 4587. Surface treatment of the adherends and application and curing of theadhesive shall be in accordance with the adhesive manufacturers instructions.Whether prepared individually or cut from adhesively bonded panels, the shape and dimensions of the
21、specimens shall be as specified in ISO 4587.For each test temperature (see Clause 9), the number of specimens tested shall be at least five.8.2 Wood adherendsThe test joints may be prepared either individually or from adhesively bonded blocks, in each case following theprocedure specified in ISO 623
22、8. Surface treatment of the adherends and application and curing of theadhesive shall be in accordance with the adhesive manufacturers instructions.Whether prepared individually or cut from adhesively bonded blocks, the shape and dimensions of thespecimens shall be as specified in ISO 6238.For each
23、test temperature (see Clause 9), the number of specimens tested shall be at least 12 and, when theyare cut from adhesively bonded blocks, they shall come from at least three blocks.9 ProcedureImmediately after being conditioned for (or in the case of heat-cured adhesives) in one of theatmospheres sp
24、ecified in ISO 291, specimens shall be tested in accordance with Clause 4 in the sameatmosphere as used for conditioning.168 h 48 hBS ISO 19212:20063In addition, specimens shall be tested at temperatures selected from the following: , , , , , , , ,and , the additional conditioning time at each tempe
25、rature being for metalsand for wood. It is not necessary to control the humidity when testing at these temperatures.10 Expression of results10.1 Plot of shear strength versus temperaturePlot adhesive shear strength versus temperature using the results from Clause 9. Figure 1 shows an exampleof a typ
26、ical plot.10.2 Failure patternsClassify failure patterns in accordance with ISO 10365.11 Test reportThe test report shall include the following particulars:a) a reference to this International Standard;b) all details necessary for complete identification of the adhesive tested, including type, sourc
27、e,manufacturers code number, batch or lot number, physical form, etc.;c) the shape and dimensions of the adherends, as well as the material of which they are made, their surfacepreparation and any other necessary information on them;d) the method used to apply the adhesive to the adherends, the dryi
28、ng and pre-cure conditions (if relevant),the curing time or setting time, and the bonding procedure used (including the bonding temperature andpressure);KeyX temperature ( )Y shear strength (MPa)Figure 1 Typical plot of shear strength versus temperature( 40 3)C( 20 3)C (0 2)C (40 2)C (60 2)C (80 2)C
29、 (100 2)C (120 2)C (140 2)C(160 2)C (180 2)C 10 min24 hCBS ISO 19212:20064e) the average thickness of the bond after bonding and the method used to determine the thickness;f) details of test specimen preparation, the shape and dimensions of the test specimens, their number andconstruction, the atmos
30、phere in which they were conditioned before testing and the atmosphere in whichthey were tested;g) the test speed (or the rate of loading in the case of constant rate of load application);h) the shear strength of each test specimen tested at each temperature, the mean shear strength and thestandard
31、deviation from the mean, and the plot of adhesive strength versus temperature;i) the failure patterns, classified in accordance with ISO 10365;j) details of any deviations from the specified procedure and of any incidents which may have affected theresults;k) the date of testing.BS ISO 19212:20065An
32、nex A(informative)Practical information on the test methodA.1 GeneralThis International Standard is relevant to adhesives that are used for the manufacture of products which areutilized in the interior of buildings. For these applications, a knowledge of the dependence of the adhesivestrength on tem
33、perature is a useful indicator of the durability of the adhesive, and a measure of the temperaturedependence of shear strength is an important aid in design and material selection.This annex gives practical information relating to this standard, including background information on the methodused as
34、well as the reasons why this method was preferred to other methods.There are three commonly used ways of determining the dependence of adhesive strength on temperature:a) by determination of the temperature dependence of the adhesive bond (i.e. the measurement of theadhesive strength at different te
35、mperatures)1;b) by determination of the thermal-degradation properties of the bond;c) by determination of the temperature dependence of the creep properties of the bond2.This International Standard uses approach a).A.2 Background informationA.2.1 Test methods not considered appropriate for this Inte
36、rnational StandardA.2.1.1 Determination of adhesive strength at the glass-transition temperatureSince the mechanical properties of an adhesive change most rapidly at temperatures in the region of theadhesives glass-transition temperature 3, 4, 5, consideration has been given to characterizingtempera
37、ture dependence by presenting strength results at . Following experimental studies in whichdifferential scanning calorimetry (DSC) and thermomechanical analysis (TMA) were employed to measure ,this approach was considered unsatisfactory for the following reasons:a) Some adhesives, such as epoxy resi
38、ns and urethane resins, show extreme changes in adhesive strengtharound , whereas others do not. This difference in behaviour is due to the fact that each resin hasdifferent softening properties.b) In the case of emulsion resins, it is very difficult to measure because of the effects of the emulsifi
39、ingagent and the solvent.c) The reproducibility of determinations at is problematic because the value of depends on the methodused to measure it, such as DSC, TMA or differential thermal analysis (DTA), as well as on the operatorcarrying out the measurement and the measurement conditions (rate of he
40、ating).A.2.1.2 Classification of adhesives by temperature dependenceNext, a method for classifying adhesives by measuring the reduction in strength at an elevated temperature wasexplored.The adhesive strength of adhesively bonded products, or parts of such products, was measured at andat a higher te
41、mperature between and . The adhesives were then classified into four typesTgTgTgTgTgTgTg23C23C 100CBS ISO 19212:20066according to the value of the adhesive strength at the elevated temperature expressed as a percentage of theadhesive strength at .At this stage, it was recognized that the classificat
42、ion of adhesives in this way was problematic, as it does notmake sense to classify adhesives whose adhesive strength at is totally different from each other as thesame type.Another approach was needed, for example:a) ranking adhesives at a single temperature, e.g. , which is a suitable temperature f
43、or assessingtemperature dependence;b) determining the maximum temperature up to which the adhesive retains the adhesive strength it has at.Approaches a) and b) were rejected, however, because they were of limited applicability.In conclusion, instead of presenting data in the way shown in Table A.1,
44、plotting a graph of adhesive shearstrength versus temperature has been adopted in this International Standard (see Figure 1). Adhesivemanufacturers and users can easily understand adhesive properties with this kind of plot.A.2.2 Method selected for this International StandardA.2.2.1 Test specimensAs
45、 a result of investigation of several types of adherend such as metal, glass, tile, concrete, mortar, plastics,reinforced plastics (FRP, etc.), wood and wooden material thin metal plates and wood were selected for thismethod. These materials give good results in evaluating the durability of adhesive
46、s and, furthermore, arereadily available. Test specimens cut out of adhesively bonded products were also tested.A.2.2.2 Test temperature rangeBy means of questionnaires circulated to experts in the fields of plywood, wooden components, paper, cars,aircraft, shoes, electrical appliances, etc., it was
47、 established that the temperatures most commonly used fortesting adhesively bonded products lie in the range from to .However, since the temperature used can range from to , the range used in this InternationalStandard has been fixed at to , with measurements at intervals, as specified inASTM D 1151
48、6.Table A.1 Classification of adhesives by their temperature dependenceTypeAdhesive strength at an elevated temperature expressed as a percentage of the adhesive strength at 1 100 to 80279 to 635 44 39 to 023C23C80C23C23C%40C +120C40C +180C40C +180C 20CBS ISO 19212:20067Bibliography1 JIS K 6831, Adh
49、esives Determination of temperature dependence of adhesive bonds2 JIS K 6859, Testing methods for creep rupture of adhesive bonds3 ISO 3146, Plastics Determination of melting behaviour (melting temperature or melting range) of semi-crystalline polymers by capillary tube and polarizing-microscope methods4 JIS K 7121, Testing methods for transition temperatures of plastics5 JIS K 7122, Testing methods for heat of transitions of
