Abstract:
A method increases the toughness of a material obtained by curing a composition that includes at least one vinyl ester monomer. The method includes the incorporation into the composition of a sulfonated polyaromatic thermoplastic polymer, which is achieved by dissolving the vinyl ester monomer and the thermoplastic polymer in a reactive diluent in which they are both soluble. The resulting curable composition includes at least one vinyl ester monomer, and very high toughness materials can be made from it. A curable composition can include at least one vinyl ester monomer, a sulfonated polyaromatic thermoplastic polymer and a N-vinyl lactam. The compositions can be used in the aeronautical, space, railway, nautical, automotive industries, arms and other industries.
Abstract:
A method increases the toughness of a material obtained by curing a composition that includes at least one vinyl ester monomer. The method includes the incorporation into the composition of a sulfonated polyaromatic thermoplastic polymer, which is achieved by dissolving the vinyl ester monomer and the thermoplastic polymer in a reactive diluent in which they are both soluble. The resulting curable composition includes at least one vinyl ester monomer, and very high toughness materials can be made from it. A curable composition can include at least one vinyl ester monomer, a sulfonated polyaromatic thermoplastic polymer and a N-vinyl lactam. The compositions can be used in the aeronautical, space, railway, nautical, automotive industries, arms and other industries.
Abstract:
The invention relates to a process for improving the adhesion of carbon fibres with regard to an organic matrix forming a composite material with these fibres, this composite material being obtained by bringing the fibres into contact with a resin which can be cured by chain polymerization and then polymerizing the resin, which process is characterized in that it comprises the grafting, to the surface of the fibres, before they are brought into contact with the resin, of groups capable of acting as chain transfer agents during the polymerization of said resin.Fields of application: aeronautical, aerospatial, railway, ship building and automobile industries but also the armaments industry, the industry of sports and leisure articles, and the like.
Abstract:
The invention relates to a process for improving the adhesion of carbon fibres with regard to an organic matrix forming a composite material with these fibres, this composite material being obtained by bringing the fibres into contact with a resin which can be cured by chain polymerization and then polymerizing the resin, which process is characterized in that it comprises the grafting, to the surface of the fibres, before they are brought into contact with the resin, of groups capable of acting as chain transfer agents during the polymerization of said resin.Fields of application: aeronautical, aerospatial, railway, ship building and automobile industries but also the armaments industry, the industry of sports and leisure articles, and the like.
Abstract:
It relates to the use of curable resins containing a prepolymer based on glycidyl (meth)acrylate for making composite materials for use in space and, more particularly to composite materials entering the composition of structures intended to be deployed in space and to be stiffened after deployment.
Abstract:
The invention relates to the stiffening of inflatably deployable structures, in particular for space use.More specifically, the invention relates to a flexible membrane for inflatably deployable structures, that comprises one layer of a composite and at least one polymer film that is permeable to visible radiation covering one of the faces of this layer, said composite being formed from a fibrous material impregnated with a composition incorporating an epoxide or epoxy/acrylate resin and a photoinitiator, and which is characterized in that the photoinitiator is an iron-arene complex salt of general formula (I): where A is an arene group, while X is a non-nucleophilic anion. Applications: manufacture of devices of the following types: radars, solar panels, reflectors, solar shields, antennas, solar mirrors or sails, intended to equip orbital vehicles or vehicles for space or planetary exploration.
Abstract:
A method of using at least one polymerisable resin R1 is disclosed. According to some aspects, the resin R1 is selected from the group consisting of epoxidised polybutadiene resins, epoxidised polyisoprene resins, epoxidised polysiloxane resins, epoxidised triglyceride resins and epoxidised polyether resins. The resin R1 having at the non-polymerised state a total mass loss (TML) value lower than about 10%, a recovered mass loss (RML) value lower than about 10%, and a collected volatile condensable material (CVCM) value lower than about 1%, as determined in accordance with standard ECSS-Q-70-02A of the European Space Agency. The resin R1 also characterized by an epoxide equivalent weight of about 100 to 600 g/mole. The resin is configured for the manufacture of a composite material for use in space, and more specifically, a composite material of a Gossamer structure. Polymerisable resin compositions are also disclosed which are useful in the manufacture of composite materials for use in space.
Abstract:
The invention relates to the stiffening of inflatably deployable structures, in particular for space use.More specifically, the invention relates to a flexible membrane for inflatably deployable structures, that comprises one layer of a composite and at least one polymer film that is permeable to visible radiation covering one of the faces of this layer, said composite being formed from a fibrous material impregnated with a composition incorporating an epoxide or epoxy/acrylate resin and a photoinitiator, and which is characterized in that the photoinitiator is an iron-arene complex salt of general formula (I): where A is an arene group, while X is a non-nucleophilic anion.Applications; manufacture of devices of the following types: radars, solar panels, reflectors, solar shields, antennas, solar mirrors or sails, intended to equip orbital vehicles or vehicles for space or planetary exploration.
Abstract:
The invention relates to a method of assembling pre-impregnated plies by local isolated polymerization of the assembly region (30) under the action of a radiation to which the resin of the prepreg is sensitive.The assembly method makes it possible in particular to produce very large sized gossamer structures (7) in the form of a concertina-folded tube which is deployed by injecting pressurized gas once in space then stiffened by polymerization under the effect of the same radiation. The pylon concerned (7) thus comprises two structural elements (10, 20) secured end to end while at the same time maintaining its flexibility and firmness qualities.
Abstract:
The invention relates to a process that makes it possible to improve the mechanical strength of bonds between substrates when these bonds are produced by means of an adhesive that comprises a resin that can be cured by chain polymerization, and in particular a resin that can be cured under the effect of ionizing or light radiation.This process is characterized in that it comprises the grafting of groups capable of acting as chain transfer agents during the polymerization of said resin to the surface of the substrates, before the latter are brought into contact with the adhesive.Applications: assembling of structural, engine, passenger compartment or bodywork parts in the aeronautical, space, railway, ship-building and automotive industries.