Fibre-reinforced composite having improved fibre-matrix adhesion

A fibre-reinforced composite (K) comprising:

• (A) ≥50 wt.-%, based on the total weight of the fibre-reinforced composite (K), of at least one continuous fibrous reinforcement material;
• (B) <50 wt.-%, based on the total weight of the fibre-reinforced composite (K), of at least one substantially amorphous matrix polymer composition comprising:
• (B1) 60 to 80 wt.-%, based on the total weight of the matrix polymer composition (B), of at least one copolymer of styrene and/or α-methyl styrene and acrylonitrile having a number average molecular weight Mn of 30,000 to 100,000 g/mol;
• and
• (B2) 20 to 40 wt.-%, based on the total weight of the matrix polymer composition (B), of at least one copolymer of styrene, acrylonitrile, maleic anhydride, and/or maleic acid and optionally monomers comprising further chemical functional groups which are appropriate to interact with the surface of the at least one continuous fibrous reinforcement material (A) having a number average molecular weight Mn of 30,000 to 100,000 g/mol;
• and
• (C) optional additives;
• wherein the at least one substantially amorphous matrix polymer composition (B) comprises >0 and ≤3 wt of repeating units derived from monomer moieties which are appropriate to interact with the surface of the fibrous reinforcement material (A), and wherein less than 10% of the number of the reinforcement fibres present at a fracture surface of the fibre-reinforced composite (K) obtained in a fatigue test according to DIN EN ISO 14125 protrude from the fracture surface with a length of more than 5 times the diameter of the fibre.