‘Phoenix polymers’: fire induced nanohardness in fibril-forming aromatic cyanate esters

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dc.contributor.authorMooring, Lyndsey
dc.contributor.authorThompson, Scott
dc.contributor.authorHall, Stephen A.
dc.contributor.authorPani, Silvia
dc.contributor.authorZioupos, Peter
dc.contributor.authorSwan, Martin
dc.contributor.authorStone, Corinne
dc.contributor.authorHowlin, Brendan J.
dc.contributor.authorHamerton, Ian
dc.date.accessioned2019-07-05T15:34:40Z
dc.date.available2019-07-05T15:34:40Z
dc.date.issued2018-10-25
dc.description.abstractFor the first time we present nanoindentation analysis of charred, cured aromatic cyanate esters, which exhibit outstanding mechanical properties when analysed under applied loads of 0.1–300 mN. Following charring (900 °C for 10 minutes to achieve graphitised structures), the samples display a remarkable combination of a modulus of elasticity of around 25 GPa and nanohardness of 300 kgf mm−2, making them some 30–40% stiffer than bone and practically as hard as tooth enamel. At the same time we find that under the same conditions the chars are highly resilient, displaying complete elastic recovery with very little plastic deformation. When cured in the presence of copper(II) acetylacetonate (200 ppm) in dodecylphenol (1% w/v active copper suspension) to form a polycyanurate, compound (2) forms a dense, consolidated structure compared with compound (1) under the same conditions. At high magnification, the presence of a nanoscale, fibrillar structure is observed, accounting for the high resilience.en_UK
dc.identifier.citationMooring L, Thompson S, Hall SA, et al., (2018) ‘Phoenix polymers’: fire induced nanohardness in fibril-forming aromatic cyanate esters. RSC Advances, Volume 8, Issue 63, pp. 36264-36271en_UK
dc.identifier.issn2046-2069
dc.identifier.urihttps://doi.org/10.1039/c8ra07449f
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/14304
dc.language.isoenen_UK
dc.publisherRoyal Society of Chemistryen_UK
dc.rightsAttribution-NonCommercial 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/*
dc.subjectpolymersen_UK
dc.subjectnanohardnessen_UK
dc.subjectaromatic cyanate estersen_UK
dc.subjecthigh resilienceen_UK
dc.subjectcharringen_UK
dc.title‘Phoenix polymers’: fire induced nanohardness in fibril-forming aromatic cyanate estersen_UK
dc.typeArticleen_UK

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