The term “self-sensing composites” is sometimes used to describe the case where the reinforcing glass fibres in advanced fibre-reinforced composites are used as the sensors for chemical process-monitoring (cure monitoring). This paper presents conclusive evidence to demonstrate that reinforcing E-glass fibres can be used for in situ cure monitoring. The cure behaviour of an epoxy/amine resin system was compared using evanescent wave spectroscopy via the reinforcing E-glass fibres and conventional transmission Fourier transform infrared spectroscopy. This paper also reports for the first time that evanescent wave spectroscopy via E-glass fibres can be used to detect the presence of silane coupling agents. Preliminary results indicated that the cure kinetics on the E-glass fibre surface, as observed using evanescent wave spectroscopy, were influenced by the silane coupling agent.
Wang, L., Pandita, S., Machavaram, V.R., Malik, S., Harris, D. and Fernando, G.F., 2009. Characterisation of the cross-linking process in an E-glass fibre/epoxy composite using evanescent wave spectroscopy. Composites Science and Technology, 69(13), pp.2069-2074.
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Categories: Photonics & Optoelectronics