Abstract: Composites are materials consisting of two or more chemically distinct constituents, having a distinct interface separating them. One or more discontinuous phases are embedded in a continuous phase. The discontinuous phase is usually harder and stronger than the continuous phase and is called the reinforcement, whereas, the continuous phase is termed the matrix. Matrix can be metallic, polymeric or ceramic. When the matrix is a polymer, the composite is called polymer matrix composite. Fillers are widely used to improve the properties of matrix materials. The particle can be either randomly oriented or preferred oriented. In the present work CKP particles are reinforced in unsaturated PEEK resin. Nickelnephthalate as accelerator is mixed thoroughly in PEEK resin followed by cobalt acetate as hardener prior to reinforcement. The reinforcement improves the flexural strength, flexural modulus, tensile strength.

Keywords: Composite, matrix, reinforcement, CKP, PEEK.