Surfacial modification for carbon fiber and its effect on the mechanical property of CF/PAA

Polyarylacetylene (PAA) is a new kind of thermal protection material, however there are some disadvantages due to its nonpolar characteristics when it is used as the matrix resin, such as inertia structure make it hard to impregnate carbon fiber. So the grafting method after anodic oxidation was used to treat carbon fiber so as to investigate the suitable interface for the non-polar matrix. Results show that the polar functional groups on the surface of carbon fiber increase after anodic oxidation treating so as to enhance the reaction of carbon fiber with the acrylic acid and import double-bond which is similar to the structure of PAA. The double-bond imported on the surface of CF will be benefit to improve the interface adhesion of CF/PAA composites and increase the mechanical properties of CF/PAA composites.