ISO INTERNATIONAL STANDARD 4650 Third edition 2012-12-15 Rubber Identification Infrared spectrometric methods Caoutchouc - Identification - Méthodes spectrométriques dans I'infrarouge Reference number IS0 4650:2012(E) LSO IS02012 IHS under itted without license from IHS Not for Resale IS0 4650:2012(E) COPYRIGHTPROTECTEDDOCUMENT ISO2012 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 permission in writing from either IsO at the addressbeloworIso'smemberbodyinthecountryoftherequester. ISO copyright office Case postale 56:CH-1211 Geneva 20 Tel.+41227490111 Fax +41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland @ IS0 2012 - All rights reserved No reproduction networking permited without license from IHS Not for Resale IS0 4650:2012(E) Contents Page Foreword .iv 1 Scope 1 2 Normative references .1 3 Principle 3.1 Analysis by transmission 1 3.2 Analysis by reflectance 1 4 Types of rubber .2 4.1 General 2 4.2 Exceptions for blends .3 4.3 Reference spectra 4 5 Reagents .4 6 Apparatus .4 7 Procedure for infrared spectrometric examination using the transmission technique 6 7.1 Procedure for raw rubber films moulded or cast from solution. 6 7.2 Procedure for raw rubbers, vulcanizates and films obtained from pyrolysate. 7.3 Procedure for vulcanized rubber film obtained after evaporation of the solution solvent.. 7 8 Procedure for attenuated total reflectance (ATR or micro-ATR) surface analysis 8 9 Interpretation of spectra ..8 9.1 Reference spectra ..8 9.2 Tables of diagnostic absorptions .9 10 Test report ..9 Annex A (informative) Comparison of reflectance and transmission spectra ..10 Annex B (informative) Absorption characteristics and reference spectra ..11 Bibliography .88 iii e with I Not for Resale