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Thermoplastic healing in epoxy networks: exploring performance and mechanism of alternative healing agents
journal contribution
posted on 2013-11-01, 00:00 authored by Russell VarleyRussell Varley, D A Craze, A P Mouritz, C H WangThis paper investigates thermally activated healing in an epoxy amine network using six thermoplastic modifiers; ethylene vinyl acetate (EVA), poly (ethylene-co-glycidyl)-methacrylate (PEGMA), poly(vinyl-butyral) (PVB), styrene-ethylene-butadiene copolymer (SEBS), acrylonitrile-butadiene-styrene (ABS) and polyethylene-co-methacrylic acid (EMAA). They all exhibit healing but varied in efficiency, repeatability and mechanism. EMAA, PEGMA and EVA display superior healing or load recovery compared with ABS, SEBS and PVB with increasing healing events. For EMAA and PEGMA this is attributed to a pressure delivery mechanism, while for EVA, it is attributed to increased viscous flow and a highly elastomeric response to damage. Adhesive binding of the fracture surfaces is also critical in restoring load.
History
Journal
Macromolecular materials and engineeringVolume
298Issue
11Pagination
1232 - 1242Publisher
Wiley-VCHLocation
Weinheim, GermanyPublisher DOI
ISSN
1438-7492eISSN
1439-2054Language
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2013, Wiley-VCHUsage metrics
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