ISO INTERNATIONAL STANDARD 6235 Third edition 2016-09-15 Rubber, raw Determination of block polystyrene content - Ozonolysis method Caoutchouc brut - Dosage du polystyrene séquencé - Méthode de I'ozonolyse Reference number ISO 6235:2016(E) ISO International Organization for Standardization @IS02016 vided by IHS underI ted without license from IHS IS0 6235:2016(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2016, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form 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 copyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyright@iso.org www.iso.org Internatinair PrganizationforStandardization etworking permitted without license from IHS IS0 6235:2016(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references 3 Principle. 4 Reactions 5 Reagents. ..2 6 Apparatus .2 7 Sample preparation .2 7.1 General. 2 7.2 Latex 7.3 Oil-extended solid rubber .3 8 Procedure. .3 9 Expression of results ..4 10 Test report ..4 Bibliography iii vided by IHS under lic ed without license from IHS