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1、 Reference number ISO 1827:2007(E) ISO 2007 INTERNATIONAL STANDARD ISO 1827 Third edition 2007-07-01 Rubber, vulcanized or thermoplastic Determination of shear modulus and adhesion to rigid plates Quadruple- shear methods Caoutchouc vulcanis ou thermoplastique Dtermination du module de cisaillement
2、et de la force dadhrence des plaques rigides Mthodes du quadruple cisaillement Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 07/16/2007 01:19:08 MDTNo reproduction or networking per
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6、 Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2007 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permi
7、ssion in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2007 All rights reser
8、ved Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 07/16/2007 01:19:08 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 1827:2007(E) ISO 2007 All rights
9、reserved iii Contents Page Foreword iv 1 Scope . 1 2 Normative references. 1 3 Terms and definitions. 2 4 Principle. 2 4.1 Method A Determination of the shear modulus 2 4.2 Method B Determination of the adhesion 2 5 Apparatus 2 6 Test piece 2 6.1 Shape and dimensions. 2 6.2 Preparation 3 6.3 Number
10、of test pieces 4 7 Time interval between vulcanization and testing 4 8 Conditioning 4 9 Temperature of test 4 10 Procedure 4 10.1 Method A 4 10.2 Method B 5 11 Expression of results . 5 11.1 Method A 5 11.2 Method B 6 12 Test report . 6 12.1 For method A. 6 12.2 For method B. 7 Copyright Internation
11、al Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 07/16/2007 01:19:08 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 1827:2007(E) iv ISO 2007 All rights reserved Foreword ISO
12、(the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical comm
13、ittee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrote
14、chnical 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 Standards. Draft International Standards adopted by the technical committees are circulated to the memb
15、er bodies for voting. Publication as an International 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 of this document may be the subject of patent rights. ISO shall not be held responsible for identifyi
16、ng any or all such patent rights. ISO 1827 was prepared by Technical Committee ISO/TC 45, Rubber and rubber products, Subcommittee SC 2, Testing and analysis. This third edition cancels and replaces the second edition (ISO 1827:1991), which has been revised principally to update the normative refere
17、nces (ISO 471, ISO 1826, ISO 3383 and ISO 4648 have been replaced by ISO 23529). Since ISO 5893 has also been revised, the force-measuring accuracy of the tensile- testing machine has been corrected to class 1. Copyright International Organization for Standardization Provided by IHS under license wi
18、th ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 07/16/2007 01:19:08 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO 1827:2007(E) ISO 2007 All rights reserved 1 Rubber, vulcanized or thermoplastic Determination of shear
19、modulus and adhesion to rigid plates Quadruple-shear methods WARNING Persons using this International Standard should be familiar with normal laboratory practice. This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the us
20、er to establish appropriate safety and health practices and to ensure compliance with any national regulatory conditions. CAUTION Certain procedures specified in this International Standard may involve the use or generation of substances, or the generation of waste, that could constitute a local env
21、ironmental hazard. Reference should be made to appropriate documentation on safe handling and disposal after use. 1 Scope This International Standard specifies methods for the determination of the modulus in shear and the strength of bonds of rubber to metal or other rigid plates, using rubber bonde
22、d between four parallel plates. Method A describes the determination of the modulus in shear. Method B describes the determination of the strength of the bonds. The methods are applicable primarily to test pieces prepared in the laboratory under standard conditions, such as can be used to provide da
23、ta for the development and control of rubber compounds and methods of manufacture of bonded shear units. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the
24、 latest edition of the referenced document (including any amendments) applies. ISO 5893:2002, Rubber and plastics test equipment Tensile, flexural and compression types (constant rate of traverse) Specification ISO 23529, Rubber General procedures for preparing and conditioning test pieces for physi
25、cal test methods Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 07/16/2007 01:19:08 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 1827:2007(E) 2 ISO 2
26、007 All rights reserved 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 shear modulus applied shear stress, calculated with respect to the bonded areas of the rubber in a test piece as specified in this International Standard, divided by the
27、resultant shear strain in the direction of application of the stress NOTE 1 The shear strain () is half the measured deformation divided by the thickness of one rubber block or element. The shear stress () is the applied force divided by twice the area of a bonded face of one rubber block or element
28、. NOTE 2 The form of the test piece specified ensures that there is zero applied stress in the direction normal to the bonded surfaces, so that the deformation can be regarded as simple shear. NOTE 3 This definition of shear modulus is sometimes referred to as the secant modulus. 4 Principle 4.1 Met
29、hod A Determination of the shear modulus The force required to obtain a range of predetermined shear strains of a unit of standard dimensions comprising four parallelepipeds of rubber symmetrically disposed and bonded to four parallel rigid plates is measured, the forces being parallel to the bondin
30、g surfaces and, as a rule, non-destructive, i.e. of maximum values appreciably lower than the bond strength. 4.2 Method B Determination of the adhesion The force required to cause the rupture of a unit as described for method A is measured. 5 Apparatus 5.1 Test machine, complying with the requiremen
31、ts of ISO 5893, capable of measuring force with an accuracy corresponding to class 1, as defined in ISO 5893:2002, and with a rate of traverse of the moving grip of 5 mm/min (method A) or 50 mm/min (method B). The test machine shall include apparatus to measure the deformation of the rubber of the t
32、est piece to an accuracy of 0,02 mm. 5.2 Fixtures, for holding the test pieces in the grips, provided with a universal joint to permit accurate centring of the line of action of the applied force. 5.3 Environmental chamber, suitable for carrying out tests at the temperature chosen or specified (see
33、Clause 9), conforming to the requirements of ISO 23529. 6 Test piece 6.1 Shape and dimensions The test piece shall consist of four identical parallelepipedic rubber elements 4 mm 1 mm thick, 20 mm 5 mm wide and 25 mm 5 mm long, bonded on each of their two largest opposite faces to the mating faces o
34、f four rigid plates of the same width and of appropriate lengths to obtain a symmetrical double- sandwich arrangement, means being provided at the free external end of each central plate to enable it to be attached to a holding fixture. The rigid plates shall be of sufficient thickness to withstand
35、bending. A typical arrangement is shown in Figure 1. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 07/16/2007 01:19:08 MDTNo reproduction or networking permitted without license fro
36、m IHS -,-,- ISO 1827:2007(E) ISO 2007 All rights reserved 3 Key 1 two external plates 2 two internal plates 3 pin and fixture for tensile loading Figure 1 Test piece arrangement 6.2 Preparation 6.2.1 Preparation of rigid plates Rectangular rigid plates of suitable dimensions shall be prepared and tr
37、eated in accordance with the requirements of a suitable adhesive system. 6.2.2 Preparation using unmoulded rubber Prepared rigid plates and suitably sized rubber blanks shall be moulded either by compression or by transfer methods. The moulding shall be carried out using a time and temperature seque
38、nce appropriate to the rubber under test. At the conclusion of moulding, care shall be taken in removing the test pieces from the mould to avoid subjecting the adhered surfaces to undue stress. 6.2.3 Preparation using pre-moulded rubber The four rubber elements for each test piece can be cut from a
39、pre-moulded sheet of uniform thickness or from a rubber product. In either case, care shall be taken to ensure that all four elements are equal in all their dimensions to within 0,1 mm. The elements shall be bonded to the prepared rigid plates using an adhesive system giving a high-modulus bond. Cop
40、yright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 07/16/2007 01:19:08 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 1827:2007(E) 4 ISO 2007 All rights reser
41、ved 6.3 Number of test pieces The test shall be carried out on three (method A) or five (method B) test pieces. 7 Time interval between vulcanization and testing Unless otherwise specified for technical reasons, the time interval between vulcanization and testing shall be in accordance with ISO 2352
42、9. 8 Conditioning 8.1 When a test is made at one of the standard laboratory temperatures specified in ISO 23529, the test piece shall be maintained at that condition for at least 3 h before the test. 8.2 When tests are made at subnormal or elevated temperatures, the test pieces shall be maintained a
43、t the conditions of test for a period of time sufficient to reach temperature equilibrium with the test environment, or for the period of time required by the specification covering the material or product being tested. 9 Temperature of test Carry out the test at one of the temperatures specified in
44、 ISO 23529. Unless otherwise specified, one of the standard laboratory temperatures shall be used. The same temperature shall be used for any series of tests intended to be comparable. 10 Procedure 10.1 Method A 10.1.1 Determine the dimensions of the rubber elements in the test piece. Where applicab
45、le, the requirements of ISO 23529 shall be met. For test pieces prepared by vulcanization in a mould, the mould dimensions can be used to determine the area of each element. The thickness shall be determined, from measurements of the rigid plates and of the moulded test piece, by difference. For tes
46、t pieces prepared from pre-moulded rubber elements, the dimensions of the elements shall be determined before bonding. 10.1.2 After conditioning as specified in Clause 8, immediately mount the test piece in the test machine, taking care to ensure freedom of longitudinal self-alignment with the direc
47、tion of force application. For some applications, a mechanical conditioning procedure might be required. In such cases, apply five successive shear-loading cycles from 0 % to 30 %. During mechanical conditioning, and during subsequent testing, maintain the test piece at the test temperature. 10.1.3
48、When the test piece is mounted in the test machine, immediately zero the force- and deformation- measuring apparatus while maintaining a slight traction force, for example 1 % of the expected maximum force. Immediately apply an increasing traction force at a rate of separation of the jaws of 5 mm/min 1 mm/min until a maximum shear strain of 30 % is reached and record the force/deformation curve. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS E