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Use of dielectric spectroscopy to assess adhesively bonded composite structures, Part I: Water permeation in epoxy adhesive

Boinard, P. and Banks, W.M. and Pethrick, R.A. (2002) Use of dielectric spectroscopy to assess adhesively bonded composite structures, Part I: Water permeation in epoxy adhesive. Journal of Adhesion, 78 (12). pp. 1001-1014. ISSN 0021-8464

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Abstract

This three-part series of papers describes studies on water penetration into epoxy resins and the use of low- and high-frequency dielectric spectroscopy as a method of monitoring the health of adhesive bond lines in bonded epoxy/graphite composite structures. The first paper is concerned with an investigation of the effect of water ingress into the epoxy adhesive resin used in the manufacturing of the adhesive bond. This study reports a dynamic mechanical thermal analysis (DMTA) and gravimetric analysis of the effects of water uptake and interprets the data in terms of various processes that can occur within the adhesive. Surprisingly high values of water absorption were observed in samples where the edges were unconstrained and presented direct access to the fibre matrix for the moisture. The study demonstrated the effects of postcure and leaching on the sorption and desorption processes and provided background data, which are necessary for the interpretation of the study described in Parts II and III of this series of articles.

Item type: Article
ID code: 5759
Keywords: experimental study, mechanical loss, dynamic mechanical properties, thermal ageing, water absorption, epoxy resin, adhesive, Mechanical engineering and machinery, Chemistry, Materials Chemistry, Surfaces, Coatings and Films, Mechanics of Materials, Chemistry(all), Surfaces and Interfaces
Subjects: Technology > Mechanical engineering and machinery
Science > Chemistry
Department: Faculty of Engineering > Mechanical and Aerospace Engineering
Faculty of Science > Pure and Applied Chemistry
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 10 Apr 2008
    Last modified: 04 Sep 2014 14:51
    URI: http://strathprints.strath.ac.uk/id/eprint/5759

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