TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The nanotubes are present at 15-40 wt.%, preferably 20-35 wt.%. The nanotubes are carbon nanotubes.    TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The mixer is a device for compounding, such as a co-mixer or co-rotating twin-screw extruder.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The thermoplastic polymer is: homo- and copolymers of olefins such as acrylonitrile-butadiene-styrene copolymer, polyethylene, polypropylene, polybutadiene and polybutylene; acrylic homo-polymer and copolymer and alkyl poly (meth)acrylates such as poly (methyl methacrylate); homo- and co-polyamide; polycarbonate; polyesters including poly(ethylene terephthalate) and poly (butylene terephthalate); polyether such as poly (phenylene ether), poly (oxymethylene), poly (ethylene glycol) and poly (oxypropylene); polystyrene; copolymers of styrene and maleic anhydride; poly (vinyl chloride), fluoropolymers such as poly (vinylidene fluoride), polytetrafluoroethylene and polychlorotrifluoro-ethylene; natural- or synthetic- rubber; thermoplastic polyurethanes; polyaryl ether ketones such as polyetheretherketone and polyether ketone ketone; polyetherimide; polysulfone; poly(phenylene sulfide); cellulose acetate; and/or poly (vinyl acetate). The plasticizer is: alkyl phosphate ester, hydroxybenzoic acid (containing linear 1-20C alkyl), lauric acid, azelaic acid and pelargonic acid; arylphosphates; phthalates, preferably dialkyl, alkylaryl, alkylbenzyl or alkyl having linear or branched 1-12C; cyclic poly(butylene terephthalate); adipates, preferably dialkyl e.g. di(2-ethylhexyl); sebacates, preferably dialkyl and dioctyl; glycol benzoates or glycerol; dibenzyl ether; chloroparaffin; functionalized amphiphilic hydrocarbon; propylene carbonate; sulfonamide, preferably alkyl sulfonamide, aryl sulfonamide and arylalkylsulfonamide, in which the aryl group is optionally substituted with at least one 1-12C alkyl, such as benzene sulfonamide and toluene sulfonamide, such sulfonamide optionally N-substituted or N, N-disubstituted by at least linear 1-20C alkyl (optionally bearing an alkyl ester group, alkylamide or (alkyl ester)alkyl amide); salts of N-alkyl guanidine, in which alkyl is preferably linear and contains 6-16C; glycols; N-butyl benzenesulfonamide, N-ethyl benzenesulfonamide, N-propyl benzenesulfonamide, N-butyl-N-dodecyl benzenesulfonamide, N, N-dimethyl benzenesulfonamide, paramethylbenzene sulfonamide, ortho-toluenesulfonamide, para-toluenesulfonamide, resorcinol bis(diphenyl phosphate), bisphenol A bis (diphenyl phosphate), neopentyl glycol bis diphenylphosphate, glycols, functionalized amphiphilic hydrocarbons and/or cyclic poly(butylene terephthalate); and/or cyclic oligobutyl terephthalate, functionalized amphiphilic hydrocarbon and/or alkyl sulfonamides. The plasticizer is present at 5-80 wt.%, preferably 10-30 wt.%. Preferred Process: The plasticizer, the thermoplastic polymer and nanotubes are introduced simultaneously or successively in the same feed hopper of mixer. The plasticizer is introduced into the mixer at the beginning of the polymer melting area. In the process, the thermoplastic polymer is a homo- or co-polyamide, and the plasticizer is sulfonamides, hydroxybenzoates, phthalates, adipates and phosphate; the thermoplastic polymer is polycarbonate and the plasticizer is alkyl phosphate ester, arylphosphates and phthalates; and the thermoplastic polymer is poly(ethylene glycol), and the plasticizer is glycol. EXAMPLE - Graphistrength C100 (RTM: Multi-wall carbon nanotubes) (20%), Rilsan AMNO TLD (RTM: Polyamide 12) (50%) powder (50%), Rilsan AMNO TLD (RTM: Polyamide 12) granules (5%) and N-butyl benzenesulfonamide (BBSA) (25%) were introduced in a hopper and partly injected with gravimetric dosing pump in the first zone of co-mixer and then melted at 295 degrees C and worked up to give carbon nanotube/polyamide 12 composite material.