Radiation curing of carbon fibre composites

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Abstract

Epoxy/carbon fibre reinforced composites were produced by means of e-beam irradiation through apulsed 10 MeV electron beam accelerator. The matrix consisted of a difunctional epoxy monomer(DGEBA) and an initiator of cationic polymerisation, while the reinforcement was a unidirectional highmodulus carbon fibre fabric. Dynamic mechanical thermal analysis was carried out in order to determinethe cross-linking degree. The analysis pointed out a nonuniformity in the cross-linking degree of thee-beam cured panels, with the formation of clusters at low Tg (glass transition temperature) and clustersat high Tg. An out-of-mould post irradiation thermal treatment on e-beam cured samples provides ahigher uniformity in the network although some slight degradation effects. Mode I delamination fracturetoughness and Interlaminar Shear Strength (ISS) were also investigated by means of Double CantileverBeam (DCB) and Short Beam Shear tests, respectively. Results from this mechanical characterisationallowed to correlate fracture toughness of the bulk matrix resin, cross-linking density and fibre/matrixinteraction to the delamination fracture behaviour of the fibre reinforced material.
Lingua originaleEnglish
pagine (da-a)14-17
Numero di pagine4
RivistaRadiation Physics and Chemistry
Volume94
Stato di pubblicazionePublished - 2014

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All Science Journal Classification (ASJC) codes

  • Radiation

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