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Дисертації з теми "Résine photopolymère"
Père, Alexandra. "Étude expérimentale et modélisation de la dynamique d'étalement d'une résine de stéréophotolithographie sur son photopolymère." Vandoeuvre-les-Nancy, INPL, 1998. http://www.theses.fr/1998INPL003N.
Повний текст джерелаNassif, Marcel. "Méthode de fabrication additive endoscopique par photopolymérisation pour la réparation in-situ de systèmes en espace contraint." Electronic Thesis or Diss., Compiègne, 2022. http://www.theses.fr/2022COMP2684.
Повний текст джерелаThis thesis concerns the study and the development of a novel endoscopic 3D printing process based on photo-polymerization. The idea behind endoscopic 3D printing is to print 3D objects or to repair damaged parts in a dense mechanical assembly without disassembling it. The thesis aims, once the state of the art is studied, to propose solutions adapted to the endoscopic problem, then to model, design, realize and experimentally validate the two main subsystems (UV photo-polymerization through an image guide, resin spraying through a tubular pipe) which, once synchronized, provide the additive printing. Inspired by the vat polymerization method, the liquid resin is transmitted endoscopically and sprayed onto the printing surface (spraying system). Then, a UV pattern, structured by a DMD (Digital Micromirror Device), is transmitted through the image guide and focused onto the printing surface to polymerize a layer of liquid resin. These two steps are repeated several times in order to print layers on top of each other to obtain a 3D part. An endoscopic actuation system (non-integrated translation actuator) allows maintaining the probe at a distance from the printing surface equal to the focal length of the objective of the instrument. In this thesis, the endoscopic UV projection system was designed, modeled, implemented and tested. The design and performances of the optical system were presented in two international conferences. Multilayer objects were fabricated with a layer thickness of 50 μm on a circular printing area of 9.54 mm in diameter. An optical analysis method based on the use of the modulation transfer functions (MTF) was used to test the performance of the endoscopic optical system and to characterize the lateral resolution of the printed parts. Using the MTF method experimentally, a drop in optical resolution due to the image guide was estimated as high as 16 μm compared to the value obtained in the experimental setup containing the same optical components except for the image guide. The lateral resolution of the printed parts was finally limited by the resin (50 μm) and not by the resolution of the optical system. An endoscopic atomization system was also studied, implemented and tested. An endoscopic spraying system was implemented to allow a remote deposition of the resin onto the printing surface. The choice of an air atomization method was adopted. The design, control and realization of the atomization system are presented. Finally, the spraying system was combined with the UV pattern projection system. Preliminary results of printing objects were obtained and 3D parts with a thickness of 0.65 mm are printed (nine layers). Due to a phenomenon called "overspray" (during the spraying process, the resin reaches the printing area and is pushed to the sides by the air pressure that sprays it), the thickness of the layers is not constant between them, but gradually decreases, so the adjustment of the spraying parameters becomes critical. The spraying system still needs to be optimized in order to eliminate overspray and to be able to print uniform layers with a specific thickness. In addition, we have been working on a 2D visualization system but the lack of light on the printing surface prevents us from being able to visualize and control the system. In the future, we propose to spray a resin mixed with a fluorescent dye to make it possible to distinguish the polymerized zones from the uncured zones in each layer of the part
Studer, Katia Celine. "Polymérisations photochimique et thermique de résines acryliques." Mulhouse, 2004. http://www.theses.fr/2004MULH0762.
Повний текст джерелаThis PhD work is addressing two major issues encountered by the light-induced polymerization: the inhibitory effect of oxygen on the radical polymerization of acrylic resins, which was sucessfully overcome by working in a carbon dioxide atmosphere, and the lack of cure in the shadow areas which cannot be reached by the light and where the resin remains therefore liquid. Dual-cure systems have been developped by associating to the light- induced polymerization a thermal reaction, either a polyaddition between isocyanates and hydrogen donors, or a thermally induced acrylic polymerization. This last reaction was succesfully induced by using benzoyl peroxide or a redox initiator involving either a benzoyl peroxide/amine system or a cerium salt. Redox polymerization offers the advantage that it can be performed at a relatively low temperature (80ʿC)
Balmes, Fabienne. "Formulation et caractérisation de nouvelles résines pour la stéréophotolithographie laser." Vandoeuvre-les-Nancy, INPL, 1992. http://www.theses.fr/1992INPL126N.
Повний текст джерелаThe@pieces made with a resin of first generation (such as the Ciba-Tool XB 5081), are very brittle because the photopolymer elongation to break was about two percent only. Hence, we have studied reactive mixtures including urethane-acrylate oligomers to improve the mechanical properties and a new reactive diluent developed by S. N. P. E. To assure high reactivity. By testing several ratios, we obtained a resin of twenty percent elongation to break. The curling of a layer cured in the 3D-machine is a major problem limiting the parts accuracy. In order to improve this accuracy, we studied the influence of resin properties on cantilever curling. The is no obvious relation between the viscosity, the interfacial tension, the shrinkage and the conversion ration of the resin on cantilever curling
Peng, Ying. "Functional Photopolymer Materials for High-resolution 3D Lithography and Nano-optics." Thesis, Troyes, 2017. http://www.theses.fr/2017TROY0039.
Повний текст джерелаLuminescent nanostructures with high emission efficiency and spatial resolution are of great interest for optics and photonics. Specifically in quantum optics, remarked as an attractive candidate for single photon sources, quantum dots (QDs) have shown promising quantum yield and stability. In this issue, the crucial point is to integrate QDs emitters with a spatially controlled manner into optical and plasmonic devices. In this thesis, photopolymer containing QDs with 3 different emission colors have been formulated and used for the fabrication of 1D, 2D and 3D nanostructures with sub-100 nm size by direct laser writing based on two-photon polymerization (TPP-DLW). The improvement of the spatial resolution of writing is realized through a strong confinement of the polymerization volume based on the use of free radical inhibitors. The results show that the smallest feature size of 3D polymer woodpiles could reach 60 nm with a period of 350 nm, which has never been reported in the fabrication via TPP-DLW using single laser emitting at 780 nm. Investigations showed that spatial resolution of writing is significantly improved in the presence of Qds. Photochemical and kinetics studies were performed to understand the effect of both inhibitors and Qds on the nanostructuring by TPP. Finally, the local integration of QDs into Ag nanowires, ion exchange-glass optical waveguides, Gold nanocubes and fiber tips was achieved. We believe that our results and approaches of nanofabrication will stimulated further promising works in nano-optics
Rouby, Michel. "Etude de systèmes d'amorçage photochimique appliqués aux résines dentaires." Montpellier 2, 1995. http://www.theses.fr/1995MON20193.
Повний текст джерелаCharlot, Vincent. "Développement d'une résine thermoplastique photopolymérisable dans le cadre d'une application photocomposite." Thesis, Mulhouse, 2015. http://www.theses.fr/2015MULH8552.
Повний текст джерелаThis manuscript brings together research in the development of a light-curing thermoplastic resin for a composite application. This work was performed under the COMPOFAST project launched by Arkema at the end of 2012. This project, along with the ADEME, aims at the development of a new generation of thermoplastic composites with high production rates for designing automobile parts. The advantages of these materials, and therefore of the project, is making vehicles lighter by reducing the mass of the parts used and the recyclability of the selected matrices. Through this project, several techniques were considered. As part of this thesis, it's the QCM method for Quick Composite Molding, which has been studied within the LPIM. The use of light to ensure the polymerization of the matrix makes this method innovative. This step called photopolymerization is known to be one of the fastest ways to form a solid resin from a liquid formulation. The method also relies on the automated removal prepreg bands on an open mold in order to increase the rate of production of composite parts. Technically, two stages were planned: the first involves the automatically construction of prepreg tapes. The second step is the design of the composite by automatically depositing prepregs on the mold which is followed by a final step of irradiation to give the desired photocomposite
Mhanna, Ali. "Synthèse et formulation de résines photopolymérisables issues de la biomasse : application pour l'impression Braille." Thesis, Dijon, 2014. http://www.theses.fr/2014DIJOS021/document.
Повний текст джерелаThe work of the PhD deals with the synthesis of polymerizable monomers derived from biomass, the study of their photopolymerization and the characterization of the resulting materials. The formulated monomers were tested in a printing method of Braille characters.The monomers were prepared in a two-steps reaction that is simple, economic and environmentally friendly. The first step comprised a reaction between glycerol derivatives (glycerol carbonate or glycidol) and fatty acids. In the second step, the obtained [alpha]-monoglycerides were functionalized to obtain photopolymerizable monomers. The different obtained monomers that bear (meth)acrylate and/or epoxy groups were photopolymerized in a few seconds in the presence of photoinitiator.The photopolymerization kinetics were followed by FT-IR spectroscopy in ATR mode, and various parameters such as the amount and the nature of the photoinitiator, the irradiation intensity and the temperature were optimized. The different photocured materials were characterized to highlight their main physicochemical properties. Structure-properties relations were then established.Finally, a photopolymerizable formulation having a viscosity compatible with the printing process of Braille characters was developed by adding nanometric silice. The obtained Braille characters exhibited features close those carried out by the industrial partner
Lavernhe, Patrick. "La photopolymérisation en application orthodontique." Toulouse 3, 2007. http://www.theses.fr/2007TOU30013.
Повний текст джерелаTwo photopolymerization processes (halogen and LED), two cement types for orthodontic bonding – a composite one : Transbond XT and a CVI hybrid one: Fuji ortho LC II – are assessed; cements are photopolymerised between 20 and 40 s with a halogen lamp and for 5 10 15, 20 or 40 s with a LED lamp. Studying the cement joint is by hardness, thermic measures and traction/ Shearing trials. Increasing photopolymerisation time improves hardness results and bonding resistance whatever the type of lamp, except for CVI, for which beyond 15 s, results go decreasing. Photopolymerisation increases tooth temperature by 2°C and with a halogen lamp, bracket temperature is increased by + 20°C. LED lamps are quite satisfactory. CVI has an easy clinical use, it reinforces resistance to carious lesions, mustn't be photopolymerised for more than 15 s and remains short of the adhesive performances of composites
Geelhand, de Merxem Ludovic. "Nouveaux matériaux photo-réparables à base d'huile végétale." Thesis, Normandie, 2019. http://www.theses.fr/2019NORMR042.
Повний текст джерелаA biobased photohealing coating has been developed from 4 components, including epoxidized linseed oil and 4,4’- diphenyldiamine disulfide. The process has been carried out in two steps via an epoxy/amine reaction. The photohealing character is ensured by the presence of disulfide bridges which, under UV irradiation, can be photolyzed reversibly. The obtained coating contains about 46 wt-% of biobased compounds and 24 wt-% of photosensitive molecules. Compared to an analogous material without disulfide bond, the coating exhibits a lower crosslinking density and a higher fracture elongation.A significant repair of a 100 μm depth scratch has been occurred. An increase of 42% of tensile strength has been observed in only 3 hours of UV irradiation at 100°C
Книги з теми "Résine photopolymère"
Nakamura, Kenichiro. Photopolymers. Taylor & Francis Group, 2014.
Знайти повний текст джерелаNakamura, Kenichiro. Photopolymers: Photoresist Materials, Processes, and Applications. Taylor & Francis Group, 2018.
Знайти повний текст джерелаNakamura, Kenichiro. Photopolymers: Photoresist Materials, Processes, and Applications. Taylor & Francis Group, 2018.
Знайти повний текст джерелаPhotopolymers: Photoresist Materials, Processes, and Applications. Taylor & Francis Group, 2014.
Знайти повний текст джерелаNakamura, Kenichiro. Photopolymers: Photoresist Materials, Processes, and Applications. Taylor & Francis Group, 2018.
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