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Poly(ethylene-co-methacrylic acid) (EMAA) as an efficient healing agent for high performance epoxy networks using diglycidyl ether of bisphenol A (DGEBA)

Pingkarawat, K., Dell'Olio, C., Varley, R. J. and Mouritz, A. P. 2016, Poly(ethylene-co-methacrylic acid) (EMAA) as an efficient healing agent for high performance epoxy networks using diglycidyl ether of bisphenol A (DGEBA), Polymer, vol. 92, pp. 153-163, doi: 10.1016/j.polymer.2016.03.054.

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Title Poly(ethylene-co-methacrylic acid) (EMAA) as an efficient healing agent for high performance epoxy networks using diglycidyl ether of bisphenol A (DGEBA)
Author(s) Pingkarawat, K.
Dell'Olio, C.
Varley, R. J.
Mouritz, A. P.
Journal name Polymer
Volume number 92
Start page 153
End page 163
Total pages 11
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2016-06-01
ISSN 0032-3861
Summary The use of poly(ethylene-co-methacrylic acid) (EMAA) as an efficient and repeatable thermally activated healing agent in a high performance diglycidyl ether of bis phenol A (DGEBA)/diethyl toluene diamine (DETDA) mendable epoxy composite is presented. Despite curing above the melting point of EMAA (Tm = 85 °C), healing was facilitated by incorporating a preliminary low temperature curing step of 5 h at 80 °C, prior to epoxy cure at 150 °C. Healing was subsequently shown to occur at 130 °C, 150 °C and 200 °C via a pressure delivery mechanism derived from a condensation reaction between EMAA and the residual hydroxyl groups formed during epoxy cure. Healing was repeatable over 5 healing cycles despite a gradual reduction in efficiency, while efficiency increased with increasing healing temperature. Importantly, healing was evident at 130 °C, despite the epoxy network remaining in the glassy state at this temperature (Tg = 150-158 °C). As well as creating high performance mendable composites based upon DGEBA/DETDA, EMAA particles distributed evenly on the surface of the crack plane were found to enhance mode I interlaminar fracture toughness by up to 200% for both DETDA and 4,4 diamino diphenyl sulphone (44 DDS) systems.
Language eng
DOI 10.1016/j.polymer.2016.03.054
Field of Research 099999 Engineering not elsewhere classified
Socio Economic Objective 0 Not Applicable
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, Elsevier Ltd.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30089345

Document type: Journal Article
Collection: Institute for Frontier Materials
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