ISO INTERNATIONAL STANDARD 22768 Third edition 2020-07 Raw rubber and rubber latex Determination of the glass transition temperature by differential scanning calorimetry (DSC) Caoutchoucetlatexdecaoutchoucbrut-Determination de la températuredetransitionvitreuseparanalyse calorimetrique différentielle (DSC) Reference number IS0 22768:2020(E) ISO @ ISO 2020 IS0 22768:2020(E) COPYRIGHTPROTECTEDDOCUMENT IS02020 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 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: +4122749 0111 Email: copyright@iso.org Website: www.iso.org Published in Switzerland i @ IS0 2020 - All rights reserved IS022768:2020(E) Contents Page Foreword iv 1 Scope. 1 2 Normative references .1 3 Terms and definitions .1 4 Principle .2 5 Apparatus and materials. .2 6 Preparation of the test sample .2 6.1 Rawrubber. .2 6.2 Rubberlatex 2 Conditioning. 7 .2 8 Calibration .2 9 Procedure. .3 9.1 Gasflowrate .3 9.2 Loading thetest specimen .3 9.3 Temperature scan .3 10 Expression of results .3 11 Test report. .4 12 Precision .5 AnnexA(informative)Precisiononrawrubber .6 AnnexB (informative)Precisiononrubberlatex Bibliography 11 IS0 2020 -All rights reserved iii