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Characterization of the moisture absorption and thermal ageing behaviour of polymeric composite systems using Raman spectroscopy

conference contribution
posted on 1999-01-01, 00:00 authored by V Otieno-Alego, D Creagh, B Jar, Bronwyn Fox, A Lowe
Advanced polymeric materials and their respective composites are fast becoming one of the world's most frequently used engineering materials. They find application in the manufacture of e.g. boat hulls, high performance motor vehicles, aircraft components and sports goods. Their high specific strength and specific stiffness give them the edge in applications where weight savings are critical, but their long-term durability is often questioned. These materials are susceptible to environmental conditions such as temperature and humidity. There is also a lack of relevant data, due to the long time-scales required for testing. In this study, the Raman technique has been used to monitor the degradation of two composite systems, namely: a rubber toughened vinylester material used in the marine industry and a high temperature bismaleimide/carbon fibre aerospace composite. Preliminary Raman studies show that the toughening rubber particles dispersed in the cured vinylester resin are leached out during hygrothermal ageing. The weight gain during ageing suggests that this leaching process occurs concurrently with the absorption of water molecules. An increase in the degree of cross-linking is observed when bismaleimide/carbon fibre composite is aged at high temperature. This cross- linking tendency decreases with increasing depth within the carbon fibre bundle.

History

Event

International Conference on Ageing Studies and Lifetime Extension of Materials (1st : 1999 : St. Catherine's College)

Pagination

113 - 121

Publisher

Kluwer Academic/Plenum Publishers

Location

Oxford, England

Place of publication

New York, N. Y.

Start date

1999-07-12

End date

1999-07-14

ISBN-10

0306464772

Language

eng

Publication classification

E1.1 Full written paper - refereed

Copyright notice

2001, Kluwer Academic/Plenum Publishers

Editor/Contributor(s)

L Mallinson

Title of proceedings

Ageing Studies and Lifetime Extension of Materials : Proceedings of the First International Conference on Ageing Studies and Lifetime Extension of Materials, held July 12-14, 1999 at St Catherine's College, Oxford, UK

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