International ISO Standard IS01431-1 Seventh edition Rubber, vulcanized or 2024-07 thermoplastic Resistance to ozone cracking - Part 1: Static and dynamic strain testing Caoutchouc vulcaniséouthermoplastique-Resistanceau craquelageparl'ozone Partie 1: Essais sous allongement statique et dynamique Reference number IS0 1431-1:2024(en) @ISO2024 IS0 1431-1:2024(en) COPYRIGHTPROTECTEDDOCUMENT @IS02024 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either IsO at the address below or Iso's member body in the country of the requester. ISO copyright office CP 40i: Ch.de Blandonnet 8 CH-1214 Vernier,Geneva Phone: +41 22 749 01 11 Email: [email protected] Website: www.iso.org Published in Switzerland @IS0 2024-All rights reserved ii IS0 1431-1:2024(en) Contents Page Foreword. Introduction .vi 1 Scope. .1 2 Normativereferences .1 ..1 3 Terms and definitions .2 4 Principle 5 Apparatus. .2 6 Calibration. .7 7 Test pieces. ..7 7.1 General. .7 7.2 Wide strip test piece. .7 7.3 Narrowstriptestpiece 7.4 Dumb-bell test piece. ..8 8 Conditioning .8 8.1 Conditioningintheunstrained state. ..8 8.2 Conditioninginthestrained state (forstaticstraintesting only) ..8 Test conditions. 9 .9 9.1 Ozone concentration. 9.2 Temperature .9 9.3 Relative humidity. ..9 9.4 Maximumelongation .10 9.5 Exposure period. .10 10 Static strain testing. .10 ..10 10.1 General. 10.2 Procedure A ..10 10.3 ProcedureB ..10 10.4 Procedure C ..10 11 Dynamic strain testing .11 11.1 General. .11 11.2 Continuousdynamicexposure ..11 11.2.1 Choice of procedure. .11 11.2.2 ProcedureA ..11 ..11 11.2.3ProcedureB 11.3 Intermittentdynamic exposure ..11 11.3.1 Exposure procedure. ..11 11.3.2 Procedure A ..12 ..12 11.3.3 ProcedureB 12 Expression of results ..12 12.1 ProcedureA ..12 12.1.1ProcedureA.1:evaluation with visual assessment ..12 12.1.2ProcedureA.2:evaluation with imageanalysingtechnique .12 12.2 Procedure B ..12 12.3 ProcedureC .12 12.3.1 ProcedureC.1:evaluationwithvisual assessment .. 12 12.3.2 ProcedureC.2:evaluation with image analysingtechnique .13 ..14 12.4 Procedure D: evaluation with physical properties change. Test report. ..14 13 AnnexA(informative)OzonecrackingExplanatorynotes ..16 IS0 2024-All rights reserved ii