Title: SURFACE MODIFICATION OF PBO FIBRES BY GAMMA-RAY IRRADIATION: EFFECTS ON INTERFACIAL PROPERTIES OF THEIR EPOXY COMPOSITES
Page Range: p.263-270
Author(s): Zhang C H; Huang Y D; Liu L
File size: 179K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 13
Issue No: No. 3
Abstract
Surfaces of polyphenylene bezobisoxazole (PBO) fibres were grafted with epichlorohydrin by a gamma irradiation method. The influence of the irradiation dose on the interfacial shear strength (IFSS), interlaminar shear strength (ILSS) and the fibre wettability were investigated. The fibre surface composition and the shear fracture topography of PBO fibre/epoxy resin composites were also analysed by X-ray photoelectron spectroscopy and scanning electron microscopy respectively. Results were able to indicate the optimal irradiation dose for fibre surface modification, and details are given of improvements to IFSS, ILSS and wettability of the fibres. SEM indicated that the improved interfacial adhesion resulted in a change in the failure mode of PBO fibre/epoxy composite from an adhesive-type interfacial failure to a cohesive-like matrix failure. 14 refs.
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