| 摘要 |
<p>A fiber-reinforced composite material is provided which is capable of achieving dynamical properties, such as CAI and ILSS, at high levels, and capable of improving both Mode I interlaminar fracture toughness G IC and Mode II interlaminar fracture toughness G IIC concurrently to high levels. The fiber-reinforced composite material has a plurality of reinforcing-fiber-containing layers and a resin layer in each interlaminar region between adjacent reinforcing-fiber-containing layers, the layers obtained by curing a laminate of a plurality of prepregs, wherein the resin layer is composed of a cured product of a resin composition containing a compound having in its molecule a benzoxazine ring represented by formula (1), epoxy resin, a curing agent, a toughness improver, and polyamide 12 powder, wherein the fiber-reinforced composite material has a G IC of not lower than 300 J/m 2 , and a G IIC of not lower than 1000 J/m 2 :
(R 1 : C1-C12 chain alkyl group or the like; H is bonded to at least one of the carbon atoms of the aromatic ring at ortho- or para-position with respect to C to which the oxygen atom is bonded).</p> |
