Abstract: One subject of the present invention is a method for preparing a composite preferably containing 10 to 50% by weight of nanotubes, comprising: (a) the introduction, into a mixer, of nanotubes and at least one thermoplastic polymer, such as a homopolyamide or copolyamide, a polycarbonate, SBM or a PEG; (b) the melting of the thermoplastic polymer; and (c) the mixing of the molten thermoplastic polymer and the nanotubes, provided that aplasticizer is introduced upstream of, or in, the melting zone of the polymer. The invention also relates to the composite thus obtained and to its use in the manufacture of a composite product.

Abstract: The invention relates to a method of manufacturing fibres made of a composite based on a thermoplastic polymer and conducting or semiconducting particles, which includes a heat treatment, said heat treatment consisting in heating the composite, by progressively raising the temperature, having the effect of improving the conducting properties of the fibres obtained or of making the initially insulating fibres conducting. The invention also relates to the conducting fibres thus obtained and in particular to polyamide fibres and carbon nanotubes.

Abstract: The present invention provides a process for preparing a composite material containing from 15% to 60% by weight of nanotubes, comprising: (a) introducing into a compounding device a liquid polymer composition comprising at least one thermosetting resin in the liquid state, nanotubes and optionally a rheology modifier, (b) mixing the polymer composition and the nanotubes within said device, to form a composite material, (c) recovering the composite material, optionally after conversion to an agglomerated solid physical form such as granules. The invention likewise relates to the composite material thus obtained, and also to its use for manufacturing a composite product.