The fibre-matrix interface has been studied by single fibre pull-out t
ests, Fourier transform infra-red spectroscopy and differential scanni
ng calorimetry/thermogravimetry measurements. Unsized, oxidized and ep
oxy-sized carbon fibres were used. The epoxy resin was of the bispheno
l A diglycidylether type and the curing agent was dipropylenetriamine.
The results of interfacial tests are compared with bulk composite pro
perties.