thermosetting composite piece prepolymerized and methods of making such a piece

The invention relates to a part (10) of composite material with a fibrous reinforcement having a structure (11) formed of an assembly of fibers held in a thermosetting resin and a peel ply (13) over all or part of a surface outer (12) of said structure. The part has a gradient of polymerization at the interface (15) between the structure and the peel ply. The invention also relates to production of such a piece of methods. The invention also relates to methods of assembly by gluing of such parts.