A new progressive load test is introduced to study the scratch behavior of a set of model UV-cured epoxy acrylate coatings. A custom-built scratch tester, capable of controlling imposed load and scratching rate, was employed. The model coating systems possess systematic variations in crosslink density. Microscopy tools were also utilized to determine the mode(s) of failure on the coating surfaces. Correlation is made between the coating resistance against surface damage and material parameters, such as modulus, ductility and adhesive strength to the substrate. The usefulness of the quantitative test method for improving coatings against scratch and wear is discussed.

Subject
Test methods, Coatings, Materials, Acrylates, Correlation, Substrates, Microscopy, Machinery, Coating damage, Epoxy coatings, Force, Epoxies, Damage
Keywords:
epoxy coatings, scratch testing, adhesive strength, ductility, crosslink density, microscopy
© 2005 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).
2005
Association for Materials Protection and Performance (AMPP)
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