1、 Reference number ISO 6721-6:1996/Amd.1:2007(E) ISO 2007INTERNATIONAL STANDARD ISO 6721-6 First edition 1996-05-15 AMENDMENT 1 2007-02-01 Plastics Determination of dynamic mechanical properties Part 6: Shear vibration Non-resonance method AMENDMENT 1 Plastiques Dtermination des proprits mcaniques dy
2、namiques Partie 6: Vibration en cisaillement Mthode hors rsonance AMENDEMENT 1 ISO 6721-6:1996/Amd.1:2007(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which
3、are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobes licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incor
4、porated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event tha
5、t a problem relating to it is found, please inform the Central Secretariat at the address given below. 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
6、 microfilm, without permission 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
7、ISO 2007 All rights reservedISO 6721-6:1996/Amd.1:2007(E) ISO 2007 All rights reserved iii Foreword ISO (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 o
8、ut through ISO technical committees. Each member body interested in a subject for which a technical committee 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 c
9、ollaborates closely with the International Electrotechnical 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 Standards adopted by the technical committees are circulated to the member 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 elemen
11、ts of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Amendment 1 to ISO 6721-6:1996 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 2, Mechanical properties. ISO 6721-6:1996/Amd.1:2007(E) IS
12、O 2007 All rights reserved 1 Plastics Determination of dynamic mechanical properties Part 6: Shear vibration Non-resonance method AMENDMENT 1 Page 1, Clause 1 Replace the first paragraph by the following (grey shading indicates new text): “This part of ISO 6721 describes a forced, non-resonance meth
13、od for determining the components of the shear complex modulus G* of polymers at frequencies typically in the range 0,01 Hz to 100 Hz. Higher- frequency measurements can be made, but significant errors may be obtained in the dynamic properties measured (see 10.2.1 and 10.2.2). The method is suitable
14、 for measuring dynamic storage moduli in the range 0,1 MPa to 50 MPa. Although materials with moduli greater than 50 MPa may be studied, more accurate measurements of their dynamic properties can be made using a torsional mode of deformation (see parts 2 and 7 of ISO 6721).” Page 3, Subclause 9.5 Re
15、place Note 3 by the following paragraph (grey shading indicates new text): “If the shear strain exceeds the limit for linear behaviour, then the derived dynamic properties will depend on the magnitude of the applied strain. This limit varies with the composition of the polymer and the temperature, a
16、nd is typically in the region of 0,2 % for glassy plastics, but the effect is evident at very low dynamic strains in carbon-particle-filled rubbers. The dynamic strain range for linear behaviour can be explored by varying the dynamic displacement amplitude at a constant frequency and recording any c
17、hange in dynamic stiffness with strain amplitude. A low frequency should be used for this purpose to minimize any temperature increase caused by mechanical loss. If non-linear behaviour is detected in the strain range of interest, the dynamic strain limit shall be recorded in the test report.” ISO 6721-6:1996/Amd.1:2007(E) ICS 83.080.01 Price based on 1 page ISO 2007 All rights reserved
