Thermal expansion behaviours of surface modified carbon fibre reinforced polyamide composite

Abstract

A comparison was made of the effects of coupling regents (RES) surface modification and air oxidation on the improvement of the interfacial adhesion of carbon fibres in reinforced polyamide (PA) composites. Results showed that RES modification greatly strengthens the adhesion between the reinforcement and matrix and is superior to improvements produced by surface oxidation in air. The optimum interfacial adhesion was reached at 0·3 wt-% RES concentration. The thermal expansion behaviour of the carbon fibre reinforced PA (CF/PA) composite also showed RES modification improved the interfacial adhesion.