Abstract: CF/PEEK composite is widely used in various fields because of its light weight, high strength, corrosion resistance, aging resistance and other characteristics, and it will inevitably produce leftovers and waste materials in the molding process, so it is very meaningful to study the recycling of CF/PEEK. Due to the high melting point and high viscosity of PEEK solution, it is difficult to recycle and reuse such materials. In this work, by adding a certain amount of PEEK resin powder, the hot-pressing process of short-cut prepreg is improved, and the effect of ultraviolet aging on the micro-morphology and mechanical properties of the composite is studied by ultraviolet accelerated aging test, and the anti-ultraviolet aging performance of chopped CF/PEEK composite is comprehensively evaluated by principal component analysis, It provides a reference for the recycling of thermoplastic prepreg and thermoplastic composite products. The results showed that the surface quality and mechanical properties of the composite with resin powder were significantly improved. The resin matrix on the surface of the sample will appear powdery cracking and gradually fall off under the action of ultraviolet aging, and defects such as holes and cracks will be formed on the surface. The longer the ultraviolet aging time is, the more serious the damage on the surface of the composite is, and the more obvious the decline in mechanical properties is. According to the principal component analysis, the amount of resin added has little effect on the ultraviolet aging resistance of chopped CF/PEEK composites.
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2024, Vol. 38 
