A Qualitative Visual Analysis of the Fractured Surfaces of Epoxy/Carbon Fibre Composite Prepared by the Melt and the Solution Technologies

This study is the investigation of the adhesion properties of epoxy matrix to carbon fibre for quasi-static loadings. The shear adhesion strength can be served as a measure of the adhesion. Two technologies of impregnation were employed: the solution technology (matrix was introduced into the solvent) and the melt technology (the composition was heated to reduce the matrix viscosity). Results of microstructural analysis of fracture surface in micro-carbon-fibre-reinforced polymers have been presented. It was found that the damage varies according to the matrix thickness. The effect of the thickness of the matrix on the elastic-strength characteristics of carbon fibre was determined. They were compared with the obtained theoretical and experimental values. Examples of real construction products made from carbon-reinforced plastics using melt and the solution technologies are presented.