Mechanophore-linked hydroxyl-terminated polybutadiene for the remote detection and quantification of mechanical stress

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dc.contributor.authorKister, Guillaume
dc.contributor.authorMoniruzzaman, Monir
dc.contributor.authorKhan, M.
dc.contributor.authorDebnath, S.
dc.date.accessioned2019-01-07T16:21:19Z
dc.date.available2019-01-07T16:21:19Z
dc.date.issued2018-10-21
dc.description.abstractPolymers containing chromophores often exhibit mechanoresponsive behaviour, allowing the remote detection of stress in components such as rocket motors without taking the rockets out of service. Here we describe a polymer comprising a difunctional spiropyran chromophore and methyl methacrylate cross-linked with hydroxyl-terminated polybutadiene (HTPB). This polymer was developed as a sensor for the non-destructive monitoring of mechanical stress by using the force-induced colour changes as a quantitative readout. After about 40 N of load was applied there was a gradual colour changes proportional to the compressive forces on the sample, as revealed by in-situ monitoring using a video camera and UV–Vis spectrometry. The tests highlighted a gradual decrease in the transmitted light intensity at 675 nm with increasing load, due to the opening of the spiropyran rings and their conversion to the coloured merocyanine forms. A reversible change to the initial colour occurred 72 h after the load was removed, but only under artificial fluorescent lighting, confirming that visible light is required for the ring-closing reaction. This new polymer is an ideal candidate for the remote detection of stress-induced damage in inaccessible structures or essential equipment that cannot be withdrawn from service for testing.en_UK
dc.identifier.citationG. Kister, M. Moniruzzaman, M. Khan, S. Debnath. Mechanophore-linked hydroxyl-terminated polybutadiene for the remote detection and quantification of mechanical stress. Dyes and Pigments, Volume 162, March 2019, pp. 309-314en_UK
dc.identifier.issn0143-7208
dc.identifier.urihttps://doi.org/10.1016/j.dyepig.2018.10.036
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/13793
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectMechanoresponsiveen_UK
dc.subjectDetectionen_UK
dc.subjectColour-changeen_UK
dc.subjectStressen_UK
dc.subjectReversibleen_UK
dc.titleMechanophore-linked hydroxyl-terminated polybutadiene for the remote detection and quantification of mechanical stressen_UK
dc.typeArticleen_UK

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