Abstract
Polyamide-11 undergoes a chemical aging process, caused by hydrolysis that gradually reduces the polymer's ductility and molecular weight. This is well understood and well documented in the open literature. The effects of hydrolysis on the mechanical properties of plasticized polyamide-11 as a pipeline liner are less well understood. This paper describes a study in which liners are subjected to accelerated aging by hydrolysis followed by multiple buckling cycles. The effects of molecular weight gradient through the liner wall, residual plasticizer content, and the installed stress state of the liner will be described.
Subject
Water,
Piping,
Annulus,
Moduli,
Valves,
Flanges,
Plasticizers,
Buckling,
Polymers,
Pressure,
Hydrolysis,
Ports and harbors,
Aging
© 2004 Association for Materials Protection and Performance (AMPP). All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of AMPP. Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
2004
Association for Materials Protection and Performance (AMPP)
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