A fluorescence method to estimate the distribution of stresses in polymer materials

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dc.contributor.author Olmos Díaz, Dania
dc.contributor.author Aznar Jiménez, Antonio
dc.contributor.author González Benito, Francisco Javier
dc.contributor.author Baselga Llidó, Juan
dc.date.accessioned 2017-11-22T11:00:49Z
dc.date.available 2017-11-22T11:00:49Z
dc.date.issued 2003-12-20
dc.identifier.bibliographicCitation Olmos, D., Aznar, A. J., González-Benito, J. & Baselga, J. (2003). A fluorescence method to estimate the distribution of stresses in polymer materials. Journal of Materials Processing Technology, 143-144, pp. 495-500.
dc.identifier.issn 0924-0136
dc.identifier.uri http://hdl.handle.net/10016/25928
dc.description.abstract It is very important to control the distribution of stresses in order to prevent catastrophic failures during working life of polymer materials. At the present moment, there are several methods to test the distribution of stresses in materials. In the last years, many numerical methods have been proposed, but they have limitations. On the other hand, experimental methods are difficult to perform in all cases, for example when “in situ” determinations are required. In the present work, the use of environmentally sensitive fluorescence molecules (fluorophores) to estimate the tensile state in polymers is discussed. Pyrene, p-quaterphenyl, 1,6-diphenyl-1,3,5-hexatriene (DPhHT), 1,4-bis(5-phenyloxazol-2-yl)benzene and dansyl derivatives, whose fluorescences are sensitive to different types of changes (polarity, microviscosity, etc.), were immersed in one epoxy mixture. After that, the epoxy mixture was cured in a mould to prepare size controlled samples. The specimens were uniaxially loaded. In most of the cases the fluorescence suffers small variations with the epoxy deformation. To evaluate these changes, two photophysical parameters were used: (i) the integrated intensity and (ii) the first moment in the wavenumber of the emission band, 〈ν〉. Related to the fluorescence intensity, the dansyl moiety seems to be the most sensitive; however, for 〈ν〉 the DPhHT showed the highest changes
dc.format.extent 6
dc.format.mimetype application/pdf
dc.language.iso eng
dc.publisher Elsevier
dc.rights © Elsevier, 2003
dc.rights Atribución-NoComercial-SinDerivadas 3.0 España
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subject.other Fluorescence
dc.subject.other Tensional state
dc.subject.other Epoxy resins
dc.title A fluorescence method to estimate the distribution of stresses in polymer materials
dc.type article
dc.subject.eciencia Materiales
dc.subject.eciencia Química
dc.identifier.doi https://doi.org/10.1016/S0924-0136(03)00304-2
dc.rights.accessRights openAccess
dc.type.version acceptedVersion
dc.identifier.publicationfirstpage 495
dc.identifier.publicationlastpage 500
dc.identifier.publicationtitle Journal of Materials Processing Technology
dc.identifier.publicationvolume 143-144
dc.identifier.uxxi AR/0000004116
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