Abstract: Methods for controlling and improving the conductivity of thermoplastic polymer composites containing CNTs or even for making these materials conductive when they are initially insulating. For example, methods including either injection moulding or extrusion at a temperature above the melting temperature of the polymer, or a subsequent heat treatment step of said composite obtained by injection moulding or extrusion.

Abstract: The present invention relates to a multilayer conductive fiber having a core/shell structure, wherein the core contains nanotubes, in particular carbon nanotubes. The invention also relates to a method for producing said fiber by coextrusion and to the uses thereof The invention finally relates to a composite material including the aforementioned multilayer composite fibers bonded together by weaving or using a polymer matrix.

Abstract: The present invention pertains to the use of nanotubes of at least one chemical element chosen from elements of groups IHa, IVa and Va of the periodic table to improve the high temperature mechanical properties of a polymeric matrix comprising at least one semi-crystalline thermoplastic polymer.

Abstract: The present invention relates to a conductive carbon nanotube-polymer composite, comprising carbon nanotubes, and a mixture of polymers in a form of coalesced polymer particles, wherein the mixture of polymer particles in their non coalesced form is defined by the presence of at least two population of polymer particles having a size distribution which is at least bimodal.

Abstract: The invention relates to a polymer-based cellular structure comprising carbon nanotubes. To a method for its production and uses thereof.

Abstract: The invention relates to a polymer material comprising 99 to 20 parts by weight of polymer(s), 0.1 to 80 parts by weight of carbon nanotubes, and 0.05 to 80 parts by weight of at least one type of dispersant selected from A-B-C, B-C and/or C-B-C block copolymers, wherein each block is bonded to the other by means of a covalent bond, C is a chemical and/or physical interaction with the polymer material and in preferably is miscible therwith, B is not miscible with the polymer material and with the block B and the glass transition temperature thereof. Tg is less than the polymer material use temperature, A is not miscible with the polymer material and with the blocks B and the block C and the Tg or the fusion temperature Tf is greater than the Tg of B.

Abstract: The invention relates to methods for controlling and improving the conductivity of thermoplastic polymer composites containing CNTs or even for making these materials conductive when they are initially insulating. The present invention relates to a conductive composite, based on a thermoplastic polymer and on carbon nanotubes (CNTs), and the methods for preparing said conductive composite, the methods comprising either injection moulding or extrusion at a temperature above the melting temperature of the polymer, or a subsequent heat treatment step of said composite obtained by injection moulding or extrusion.

Abstract: The present invention describes linear or star block copolymers, their process of preparation and their use in adhesive compositions, in particular as pressure-sensitive adhesive. The copolymers of the invention are prepared by controlled radical polymerization by nitroxides; they exhibit at least one soft block with a Tg of less than 0° C. and at least one hard block with a Tg of greater than ambient temperature.

Abstract: The present invention relates to a conductive carbon nanotube-polymer composite, comprising carbon nanotubes, and a mixture of polymers in a form of coalesced polymer particles, wherein the mixture of polymer particles in their non coalesced form is defined by the presence of at least two population of polymer particles having a size distribution which is at least bimodal.

Abstract: The present invention relates to pulverulent compositions based on carbon nanotubes which exhibit an excellent dispersibility in polymer materials and can advantageously be used as reinforcing agents and/or modifiers of conducting and/or thermal properties; they can be easily incorporated in polymer matrices in the masterblend form.

Abstract: The invention relates to the use of carbon nanotubes for the production of an electrically-conductive organic composition having an electrical resistivity that is constant as a function of temperature and to the applications of said compositions. The conductive organic composition has a temperature-insensitive electrical resistivity and a temperature-insensitive thermal conductivity. Constant resistivity as a function of temperature is represented in FIG. 2.

Abstract: The invention relates to a block copolymer which is produced by a controlled radical polymerization, has an individual composition and structure and is used for adhesion in a humid medium The inventive copolymer comprises a continuous flexible and water repellent matrix (of elastomer nature) and a dispersed phase in the form of hydrophilic nanodomains. Said copolymer exhibits an excellent adhesion as a result of the structure thereof also in a very humid medium.

Abstract: The invention relates to a polymer material comprising 99 to 20 parts by weight of polymer(s), 0.1 to 80 parts by weight of carbon nanotubes, and 0.05 to 80 parts by weight of at least one type of dispersant selected from A-B-C, B-C and/or C-B-C block copolymers, wherein each block is bonded to the other by means of a covalent bond, C is a chemical and/or physical interaction with the polymer material and in preferably is miscible therwith, B is not miscible with the polymer material and with the block B and the glass transition temperature thereof. Tg is less than the polymer material use temperature, A is not miscible with the polymer material and with the blocks B and the block C and the Tg or the fusion temperature Tf is greater than the Tg of B.

Abstract: Device for the measurement of viscoelasticity of products, and in particular those with low viscosity. It is of a type including a male cupel equipped with a cylindrical separating partition which can be introduced into an annular chamber arranged in a body of a female cupel and receiving the product to be measured, and a drive mechanism for movement around an axis of rotation of one of the cupels in relation to the other, and characterized in that it has, in addition, the means to close in an impervious manner the annular chamber.