PHYSICAL TESTING OF RUBBER

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1 PHYSICAL TESTING OF RUBBER

2 PHYSICAL TESTING OF RUBBER Roger Brown Springer

3 Library of Congress Cataloging-in-Publication Data A CLP. Catalogue record for this book is available from the Library of Congress. Physical Testing of Rubber, 4*^' Ed., by Roger Brown ISBN e-isbn Printed on acid-free paper. ISBN Springer Science-i-Business Media, Inc. All rights reserved. This work may not be translated or copied in whole or in part without the written permission of the publisher (Springer Science-hBusiness Media, Inc., 233 Spring Street, New York, NY 10013, USA), except for brief excerpts in connection with reviews or scholarly analysis. Use in connection with any form of information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed is forbidden. The use in this publication of trade names, trademarks, service marks and similar terms, even if they are not identified as such, is not to be taken as an expression of opinion as to whether or not they are subject to proprietary rights. Printed in the United States of America SPIN springeronline.com

This work may not be translated or copied in whole or in part without the written permission of the publisher (Springer Science-hBusiness Media, Inc.

4 Contents Preface vii INTRODUCTION 1 GENERAL CONSIDERATIONS 7 STANDARDS AND STANDARDS ORGANISATIONS 27 PREPARATION OF TEST PIECES 41 CONDITIONING AND TEST ATMOSPHERES 51 TESTS ON UNVULCANIZED RUBBERS 63 MASS, DENSITY AND DIMENSIONS 95 SHORT TERM STRESS - STRAIN PROPERTIES 109 DYNAMIC STRESS AND STRAIN PROPERTIES 173 CREEP, RELAXATION AND SET 201 FRICTION AND WEAR 219 FATIGUE 245

UNVULCANIZED RUBBERS 63 MASS, DENSITY AND DIMENSIONS 95 SHORT TERM STRESS - STRAIN PROPERTIES

5 vi Physical testing of rubber ELECTRICAL TESTS 259 THERMAL PROPERTIES 275 EFFECT OF TEMPERATURE 287 ENVIRONMENTAL RESISTANCE 317 PERMEABILITY 349 ADHESION, CORROSION AND STAINE^G 363 Index 383

6 Preface Knowledge of the physical properties of materials is essential for design, specification and quality control, and the particular nature of rubbers demands that specific test procedures, rather than methods for materials in general, are used to measure almost all of the properties. The importance of the subject of rubber testing to industry and to research is witnessed by the large number of national and international standards which have been produced. A text devoted to the physical testing of rubbers based on experience at Rapra first appeared in 1965 with the publication of the work of the late Dr J R Scott, who was widely regarded as the "father of rubber testing". The first edition of my own book came in 1979 and the second, third and now this fourth edition reflect the continuing technical developments over four decades. There have been many changes in the methods used but, more especially, there have been vast improvements to much of the instrumentation as more modern technologies are adopted by instrument manufacturers and the requirements of industry become more sophisticated. Since the last edition of the book, the majority of International (ISO) and ASTM test methods standards have been revised. The book collates the many standard methods, comments on their virtues and defects and considers procedures needed for both quality control and the generation of design data. The content owes much to the experience gained due to Rapra's position over many decades as an international centre for rubber research, as a test house with a history of developing test procedures and making a very significant contribution to national and international standardisation. The literature relating to the development and application of rubber test methods has also been reviewed.

The importance of the subject of rubber testing to industry and to research is witnessed by the large number of national and international standards which have been produced.

7 viii Physical testing of rubber The book is primarily intended as a reference for those directly concerned with testing rubbers, whether it be for quality control, evaluation of products, production of design data or research, and for students of rubber technology. However, it is believed that it will also be of considerable value to those indirectly involved in testing such as design engineers and technical specifiers. Roger Brown

or research, and for students of rubber technology.

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