Tesis sobre el tema "Copolymères – Synthèse (chimie)"
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Lévesque, Michel. "Synthèse et cristallisation de copolymères d’amylose". Thesis, Université Laval, 2011. http://www.theses.ulaval.ca/2011/27868/27868.pdf.
Texto completoBreton, Anne-Catherine. "Synthèse et caractérisation de copolymères dérivés de quinoxaline et de carbazole". Thesis, Université Laval, 2012. http://www.theses.ulaval.ca/2012/28992/28992.pdf.
Texto completoVriet, Christelle. "Généralisation de la carbonatation aux substrats polyhydroxylés : synthèse de carbonates cycliques, linéaires, et mixtes, à partir d’érythritol, de xylitol, et de sorbitol". Phd thesis, Toulouse, INPT, 2005. http://oatao.univ-toulouse.fr/7542/1/vriet.pdf.
Texto completoGaschard-Pasquet, Véronique. "Synthèse contrôlée de copolymères éthylène-butène par catalyse Ziegler-Natta bisupportée". Lyon 1, 1985. http://www.theses.fr/1985LYO10508.
Texto completoBriffaud, Thierry. "Synthèse et caractérisation de polyoxadiazoles-1,3,4". Lyon 1, 1993. http://www.theses.fr/1993LYO10017.
Texto completoLienafa, Livie. "Synthèse et étude de copolymères triblocs à base de poly(éthylène téréphtalate)". Montpellier 2, 2009. http://www.theses.fr/2009MON20208.
Texto completoIn this manuscript, we describe the synthesis and the study of properties of triblock copolymers containing poly(ethylene terephthalate) blocks. ABA and ABC triblock type copolymers were synthesized. In the case of ABA triblock copolymers, both poly(ethylene terephtalate) end blocks A are connected by a poly(lauryl acrylate) midblock B. The first step of the synthesis was the preparation of the PET blocks. Then, the lauryl acrylate copolymerization by ATRP using PET moities as initiators was achieved before the coupling of the diblocks in order to obtain the triblock copolymers. Several coupling techniques were tested, as, for instance, the "click-chemistry". A preliminary study showed that the ABA triblock copolymers could self organize in paraffin oil. The ABC triblock copolymers behaved as amphiphilic ones. The block C was a quaternarized poly(dimethylamino ethyl methacrylate). In water, this copolymer formed gels. A study of its diluted and semi-diluted solutions by rheology and small-angle neutron scattering (SANS) made possible to highlight the PET role in the rheological behavior and in the aggregate microstructure formation
Rejsek, Virginie. "Application de la polymérisation anionique des époxydes par activation du monomère à la synthèse de copolymères". Bordeaux 1, 2007. http://www.theses.fr/2007BOR13503.
Texto completoChemin, Maud. "Valorisation des xylanes du bois : vers la synthèse de copolymères amphiphiles bio-sourcés". Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0302/document.
Texto completoThis thesis work aims to add value to xylans by designing new bio-based amphiphilic polymers.Beechwood xylans were first fully characterized before their acidic hydrolysis. The hydrolysis conditions were optimized in order to obtain well-defined xylooligosaccharides, oligomeric chains of about six xylose units that have only one methylglucuronic acid unit positioned at the non-reductive chain end. Periodate oxidation of xylans was also studied in order to form new aldehyde groups within the xylan backbone in a controlled manner. The xylooligomers were then functionalized from their reductive end with an azide or an allyl group, providing the ability to couple these oligomers to fatty acid derivatives using ‘click chemistry’.The obtained amphiphilic oligomers were finally studied according to their surfactant and self-assembly properties. Their wetting properties were found to be very good, comparable to those found with Tween®80. Moreover, they self-assembled in both chloroform and water, where their structures were characterized via DLS and TEM. The resulting particles formed had a spherical micellar morphology, with a d ≤ 50 nm. However, it was found that the particles had a tendency to form large aggregates, particularly in chloroform. The aggregates could be easily removed, either by filtration or by dilution of the sample, as the forces that govern the aggregation are low enough to allow dissociation with increasing solvent volume.As previously mentioned, this thesis work led to the synthesis of bio-based amphiphilic oligomers starting from xylans, which are a potential byproduct in the paper/pulp industry. Thanks to their surfactant properties, numerous applications can be found for such a ‘green’ surfactant. Their biocompatibility added with their self-assembly nature in aqueous media makes them an attractive molecule for active substance delivery applications
Benoit, Jean-Michel. "Synthèse et cristallisation de poly(éthercétones) par contrôle des segments rigides". Thesis, Université Laval, 2011. http://www.theses.ulaval.ca/2011/28008/28008.pdf.
Texto completoFiset, Erika. "Synthèse et caractérisation de nanostructures organiques covalentes stables". Thesis, Université Laval, 2009. http://www.theses.ulaval.ca/2009/25983/25983.pdf.
Texto completoTorreilles, Christophe. "Utilisation de la chimie organométallique pour l'élaboration de polymères organiques conjugués de structure contrôlée et diversifiée". Montpellier 2, 1998. http://www.theses.fr/1998MON20089.
Texto completoColin, Charlotte. "Synthèse et caractérisation de copolymères Silicone/Polyuréthane réticulés pour l'encapsulation de modules de puissance". Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLV028/document.
Texto completoEmbedded electronics, particularly power modules, allows management of electric energy and therefore development of “carbon-free” vehicle. However, these electronic components, will shortly be located near heat engine automotive, and they must withstand various environments and sometimes, hard stresses (humidity, chemical aggression (oil), vibrations…). But actual encapsulation materials are not today efficient enough to match with these future imposed stresses. Thus, the aim of this work is to develop new encapsulation polymers. For this, two types of crosslinked Silicone/Polyurethane (Si/PU) copolymers were “solvent-free” synthesized and with short polymerization times.A first series of materials Si/PU containing between 55 and 76%wt silicone units were synthesized by alcool-iscyanate polyaddition from silicone precursor, synthesized or commercial, and a pluri-isocyanate, in the presence of catalyst. A second series of copolymers, Silicone/Polyhydroxyurethane (Si/PHU) containing 26 and 61%wt silicone units, was obtained without isocyanate or catalyst from poly(dimethylsiloxane) biscyclocarbonate and a triamine.Mechanical and thermal properties as well as hydrophobic character of all materials were evaluated. In order to improve thermal properties and decrease the cost of encapsulation resin, inorganic fillers were blended in some of Si/PU polymers.The most interesting materials were tested as encapsulant in power modules, and the first electrical measurements during thermal cyclings were very promising
Ricaud, Myriam. "Etude et contrôle du processus d'agrégation des particules de carbonate de calcium au cours du procédé de synthèse par carbonatation". Montpellier 2, 2004. http://www.theses.fr/2004MON20100.
Texto completoCrozzolo, Julien. "Synthèse et étude de copolymères hydrosolubles, associatifs et échangeables pour la récupération assistée du pétrole". Thesis, Université Paris sciences et lettres, 2020. http://www.theses.fr/2020UPSLS002.
Texto completoOne of the solutions for enhanced oil recovery is the use of aqueous formulations of polymers in order to improve the rheological properties of the extracting fluid and allow a better sweeping in the oil well. Because the polymers currently used do not allow for an efficient oil recovery, a new system was designed and studied with the aim to develop additives that could better withstand the very high shear rates induced by the injection. This system is based on the use of complementary polymers that can reversibly associate and exchange through imine chemistry. First, a thermodynamic study of the amine-aldehyde association allowed quantifying the influence of different parameters on the latter. Then, the rheological study of polymers alone in solution and of formulations of complementary polymers has shown the efficiency of the association trough a large increase in viscosity of the solutions, as well as by the formation of gels at low polymer concentration. The study of the influence of structural parameters has shown that the rheological properties of the formulation can be adjusted by playing on the polymer composition and functionality. The influence of parameters of interest for the application, such as pH, temperature and ionic strength, has also been studied. Finally, industrial tests have been performed with the polymers developed during this thesis, providing a comprehensive study of the system, from the synthesis of the monomers to application oriented tests
Guillerm, Brieuc. "Synthèse et étude physico-chimique de copolymères amphiphiles à base de poly(2-méthyl-2-oxazoline)". Thesis, Montpellier 2, 2011. http://www.theses.fr/2011MON20102/document.
Texto completoThis manuscript deals with the synthesis of amphiphilic diblock copolymers obtained by the coupling of both hydrophobic and hydrophilic homopolymers. The copolymers were achieved in two steps. On the one hand, homopolymers poly(2-methyl-2-oxazoline) P(MOx)s and poly(tert-butyl acrylate)s (P(At-Bu) were synthesized by cationic ring opening polymerization (CROP) and by Reversible Addition-Fragmentation Transfer (RAFT) polymerization and atom transfer radical polymerization (ATRP), respectively. Finally, amphiphilic diblock copolymers were achieved by Huisgen's cycloaddition. Physical chemistry studies in water proved the formation of aggregates. The latter had a spherical morphology, sizes below 100 nm and critical aggregation concentration around 10-6 mol.L-1.Knowledge acquired on the synthesis and the study of amphiphilic block copolymers led to the development of poly(-caprolactone)-g-poly(2-methyl-2-oxazoline) (PCL-g-P(MOx)) amphiphilic graft copolymers, made of a hydrophobic PCL grafted with hydrophilic P(MOx) moieties. The study of aqueous solution of such copolymers showed the formation of aggregates with characteristics close from those obtained for the diblock copolymers. Another interesting point is that P(MOx) permitted the solubilization of PCL in water.The reported work illustrated the importance of macromolecular chemistry for the obtaining of amphiphilic copolymers with controlled molecular weight and narrow molar mass distributions which self-assemble in water. Such kind of materials could be used in the biomedical field
Petrelli, Antoine. "Synthèse par chimie click non métallo-catalysée de glycoconjugués macromoléculaires d'interêt médical". Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAV043/document.
Texto completoThe aim of the project is to develop new anomeric modification of oligosaccharides for the synthesis of glycoconjugates by metal-free click chemistry. Synthetic glycans have shown a great potential in medical and nanotechnology related fields. The current use of metallic catalyst during synthesis and the risk of contamination of the final product represent a drawback which could restrain their applications. Therefore an efficient metal free synthesis of glycoconjugates could be of great interest to circumvent this obstacle.Two distinct synthetic strategies have been explored for the metal free coupling of complex oligosaccharides on polymers to yield block-copolymers and glycoadsorbants. The glycopolymers were synthetized by a Michael addition between a thiol functionalized oligosaccharide and a maleimide or bromo-maleimide functionalized polymer. The nanoparticles obtained from the self-assembly of theses amphiphilic copolymers in water were characterized. The polycaprolactone-b-xylooligosaccharides copolymers presenting a reducible linkage were self-assembled into nanoparticles and assessed as model for the delivery of hydrophobic drugs. This system showed a selective release of the entrapped molecules in reducing environment making it an interesting system for the intra-tumoral delivery of anti-cancer drugs. Glycoadsorbents were prepared by a Diels Alder reaction between a solid matrix displaying a maleimide moiety and furyl functionalized oligosaccharides. The affinity matrixes obtained allowed the selective purification of lectins. The blood group antigen (A;B) grafted matrixes displayed good properties for the trapping of corresponding anti-A or anti-B antibodies. These types of immunoadsorbants have great potential for the treatment of immune diseases like the Guillain-Barré syndrome.To conclude, two efficient anomeric modification and coupling strategies of oligosaccharides have been developed, opening the way to the metal free synthesis of various glycoconjugates
Le, Dao. "Synthèse, caractérisation et polymérisation par ouverture de cycle par métathèse de macromonomères cyclobuténiques obtenus par chimie " click " et polymérisation RAFT". Phd thesis, Université du Maine, 2012. http://tel.archives-ouvertes.fr/tel-00743217.
Texto completoLapinte, Vincent. "Polymérisation par ouverture de cycle de métathèse de monomères hétérofonctionnels : potentialités pour l'élaboration de copolymères gréffés et de supports pour la synthèse en parallèle". Le Mans, 2002. http://cyberdoc.univ-lemans.fr/theses/2002/2002LEMA1011.pdf.
Texto completoLe, Coz Botrel Ronan. "Application de la métathèse à la dégradation contrôlée de polydiènes pour la synthèse de copolymères et à l'élaboration d'ionogels". Thesis, Normandie, 2019. http://www.theses.fr/2019NORMC261.
Texto completoThe work described in this thesis has been devoted to the synthesis of poly(isoprene-co-norbornene)-type copolymers and homopolymers of the poly-norbornene type. These polymers were then exploited for the preparation of ionogels.Homopolymer synthesis is based on ring-opening metathesis polymerization of various norbornene derivatives. As for the copolymers, they were obtained by coupling this polymerization reaction and cross-metathesis from polyisoprene and functional-ized norbornenes.In a first step, the copolymer synthesis process was studied and optimized with synthetic polyisoprene, then it was extended to cryobrushed truck tire waste, making it possible to obtain poly(isoprene-co-norbornene) with a mass yield of 15%.The preparation of chemical ionogels by ring-opening metathesis polymerization of bisnorbornenes in [C4C1im][PF6] has been optimized to allow the formation of two types of ionogel that can contain up to 92 wt% ionic liquid. The chemical ionogels ob-tained here have conductivities close to that of [C4C1im][PF6] alone
Hugues, Thierry. "Polymères méthacryliques à groupements latéraux perfluorés : synthèse, propriétés de surface : comportement thermique". Montpellier 2, 1991. http://www.theses.fr/1991MON20131.
Texto completoEscalé, Pierre. "Elaboration de films nid d'abeille hiérarchiquement structurés à partir de copolymères : synthèse, structuration et propriétés de surface". Thesis, Pau, 2012. http://www.theses.fr/2012PAUU3027/document.
Texto completoThe present studies aim at designing hierarchically structured porous surface from copolymers with well defined structures. As a science in constant evolution, polymer chemistry, enable the synthesis of diblock copolymers with different natures by the mean of various radical controlled polymerization techniques. Indeed, radical controlled polymerization with nitroxyde (NMP), by atom transfer (ATRP), by reversible addition/fragmentation transfer (RAFT) or by Cu(0) were used for the synthesis of diblock copolymers based on polystyrene and different acrylates or 4-vinylpyridine blocks. The intimately association between a fast solvent evaporation process named the Breath Figure and the synthesis of the copolymers enable the production of hierarchically structured materials from micro to nanoscale. The nature of the different blocks confers adhesion, wettability or bioactivity properties to these materials. These researches benefit from the chemistry and physico-chemistry laboratory competences. Indeed, microscopy techniques (optical, atomic force and electronic), scattering (small angle neutron or X-ray) as well as tack or wettability measurements enable the complete characterization of films structuration and point up their properties
Coumes, Fanny. "Synthèse et caractérisation de copolymères amphiphiles à base de poly(acide lactique) et de poly(éthylène glycol) pour la délivrance de principes actifs". Thesis, Montpellier 1, 2014. http://www.theses.fr/2014MON13522/document.
Texto completoThe objective of this work was to synthesize and characterize amphiphilic copolymers based on poly(ethylene glycol) (PEG) and poly(lactic acid) (PLA) intended for drug delivery applications. The polymers were chosen regarding to their biocompatibility and bioresorbability. Different architectures of amphiphilic copolymers were prepared, and their behavior in aqueous media, as well as their abilities to encapsulate drugs were studied. First, a graft copolymer was synthesized through copolymerization of a functional monomer, monopropargylated glycolide, with L-lactide to yield a functionalized polyester backbone. The latter was then grafted with different densities of hydrophilic branches of PEG. Then, a brush-like triblock copolymer was synthesized through ROP and ATRP. To this end, chain ends of a telechelic block of PLA were modified to yield a macroinitiator able to initiate oligo(ethylene glycol) methacrylate polymerization with variable substitution degrees. Self-assembly and drug loading studies revealed that architecture and hydrophobic/hydrophilic balance played a major role on the nature of the formed objects and on their encapsulation potential. Finally, to modulate and increase the efficacy of encapsulated drugs, functionalization strategies were realized. This is illustrated by the linking of a fluorescent model molecule on a triblock brush-like copolymer and, in a collaboration project, the linking of an immunostimulant peptide on an amphiphilic diblock system. Comparison with other formulations revealed that the conjugate allowed modulating and reinforcing the drug's efficacy
Pibre, Guillaume. "Polymérisation du décaméthylcyclopentasiloxane à l’aide de superbases : vers une nouvelle voie de synthèse des copolymères à blocs". Thesis, Lyon 1, 2009. http://www.theses.fr/2009LYO10182/document.
Texto completoNowadays the development of performing new materials using an environmental friendly route is a challenge. To produce hard-soft block copolymers based on a high polydimethylsiloxane (PDMS) content using reactive extrusion process is a milestone to reach thermoplastic elastomers. Because of the low reactivity of high molecular weight macromolecule chain ends an original route is described. It consists in the synthesis of copolymers containing low central PDMS and then increasing the molecular weight of this central part. This crucial step is performed using phosphazene bases as polymerization agents of decamethylcyclopentasiloxane (D5). Firstly, the polymerization of D5 by phosphazene bases has been investigated by chemiorheological means. To define intrinsic data of this reaction allows modelling the viscosity change during the chemical reaction. Thus, it is observed this polymerization system is compatible with reactive extrusion. Secondly, we investigate the hypothesis of increasing the molecular weight of a short central PDMS part in a triblock copolymer by D5 insertion using the catalysis system previously described. Naphtyl end-chain functionalized PDMS was used as a model. So we confirmed this route as an interesting one to achieve the targeted macromolecular architectures. Finally, we tried to produce poly(styrene-b-dimethylsiloxane-b-styrene) through this way. In this case, early investigations are not so convincing. This may come from the experimental device used. This last observation stresses out the great potential of extrusion process to implement such a route to reach thermoplastic elastomers based on high polysiloxane content
Mora, Henri. "Synthèse et étude de nouveaux polymères porteurs d'unités TTF utilisables dans les domaines de la microlithographie et des semi-conducteurs". Montpellier 2, 1990. http://www.theses.fr/1990MON20253.
Texto completoMievis, Isabelle. "Synthèse, caractérisation et photoréactivité d'oligomères hyperbranchés". Doctoral thesis, Universite Libre de Bruxelles, 2006. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210845.
Texto completoLe but du travail de thèse est d'obtenir de nouveaux revêtements de surface, à partir de polymères hyperbranchés ou de polymères fortement branchés, qui trouveront leur application dans l'industrie chimique.
La thèse s'articule autour de trois chapitres de synthèse suivis d'un chapitre traitant de la photoréactivité des oligomères linéaires, fortement branchés, et hyperbranchés.
La première approche de synthèse envisagée est la copolymérisation alternante radicalaire. Divers maléimides ont été engagés dans des copolymérisations radicalaires avec des allyléthers sans succès.
Lorsque ces derniers sont remplacés par des vinyls éthers, une copolymérisation alternante est observée. Néanmoins, une importante irreproductibilité est constatée, certains batchs donnant lieu à une gélification.
La seconde voie de synthèse étudiée est l'approche classique de polycondensation de monomères de type AB2 .Le monomère AB2 est obtenu par addition de Michael de la diéthanolamine sur l'acrylate de méthyle. La polycondensation est concomitante avec l'acrylation des fonctions alcools. La compétition entre ces deux réactions limite les masses molaires accessibles bien que les réactions de transestérification soient catalysées par des dérivés du Zr et que la stoechiométrie ait été variée.
La troisième voie de synthèse se base aussi sur la réaction de Michael. Des oligomères fortement branchés sont obtenus à partir de 1,6-hexanedioldiacrylate et d'éthylènediamine. Leurs analogues linéaires sont synthétisés en remplaçant l'éthylènediamine par la propylamine. Lors de ces synthèses, il est apparu que les oligomères fortement branchés ont une viscosité supérieure à celle des oligomères linéaires!
Les oligomères hyperbranchés et acrylés, les oligomères linéaires et leurs analogues fortement branchés ont été étudiés du point de vue de leur photoréticulation sous rayonnement UV. Contrairement à ce qui était attendu, ils se sont montrés moins réactifs que les produits les plus performants de Cytec-Surface Specialties. Lors de cette étude, l'effet bénéfique des mines tertiaires sur l'inhibition par l'oxygène est apparu plus complexe que décrit dans la littérature.
Doctorat en sciences appliquées
info:eu-repo/semantics/nonPublished
Milani, Roberto. "Matériaux à base de phosphazènes chlorés pour la fonctionnalisation de surface, la synthèse de précurseurs monomères et la chimie supramoléculaire". Thesis, Lille 1, 2008. http://www.theses.fr/2008LIL10013/document.
Texto completoTo the research described in this thesis two principal topics of studies have been performed: - the use ofhexachlorocyc1otriphosphazene (HCCP) and poly(dichlorophosphazène) (PDCP) as coupling agents for the surface functionalization of solid substrates (inorganic materials containing organic silicon and polymerie materials), - The synthesis of phosphazenic compounds as new materials exhibiting the supramolecular structures
Ho, The Hien. "Synthèse de copolymères thermosensibles par polymérisation radicalaire contrôlée RAFT : caractérisation et étude de leur interaction avec des protéines". Phd thesis, Université du Maine, 2012. http://tel.archives-ouvertes.fr/tel-00752921.
Texto completoHoussein, Dania. "Micelles complexes de polyions à base de copolymères à blocs double hydrophiles et d’homopolyélectrolytes : Etudes physico-chimiques et applications à la synthèse de matériaux nanostructurés". Thesis, Montpellier, Ecole nationale supérieure de chimie, 2013. http://www.theses.fr/2012ENCM0028.
Texto completoPolyion complex micelles, or "PIC micelles", formed by electrostatic interaction between a neutral-ionic double hydrophilic block copolymer (DHBC) and an oppositely charged homopolyelectrolyte possess interesting properties: solubility of the polyelectrolytes in water, stability of micelles, control of the micellar association / dissociation by various stimuli (pH, ionic strength, light irradiation ...). In this thesis, the physico-chemical properties of PIC micelles of neutral-cationic DHBC/ anionic homopolymer and neutral-anionic DHBC/cationic homopolymer were studied in aqueous solution for use as structuring agents of silica-based organized nanomaterials. The pH range of PIC micelle formation, the critical micelle concentration and aggregation number of micelles were determined for each studied system. We have shown that the formation of micelles follows a cooperative mechanism which depends on the size of the homopolymer. Furthermore, we proposed an original way of photoinduced PIC micelle formation, based on a pH change after irradiation of a photochromic molecule. The studies on the PIC micelles as structuring agents of materials have shown that the morphology (nanoparticular, bulk) and the material structure (lamellar, vermicular) can be controlled by various parameters, such as the mass concentration of the DHBC / homopolyelectrolyte / silica precursor system, the content of the silica precursor and the ratio between the functions of the cationic and anionic polyelectrolytes. Finally, the template was removed by washing the hybrid materials under soft conditions in water
Saetung, Nitinart. "Synthetic- and natural rubber-based telechelic polyisoprenes : preparation and use for block copolymers via RAFT polymerization". Le Mans, 2010. http://cyberdoc.univ-lemans.fr/theses/2010/2010LEMA1025.pdf.
Texto completoSynthesize of well-defined block copolymers from Natural Rubber (NR) based telechelic polyisoprene (PI) by RAFT polymerization has been studied. Two original synthetic routes have been developed to target NR-based PIs which are further employed as macromolecular chain transfer agents (macroCTAs) for the RAFT polymerization of tert-butyl acrylate (t-BA). In the first approach, a trithiocarbonate functionalized cis-1,4-PI was synthesized via the oxidative degradation of NR followed by reductive amination and amidation. In the second approach, a well-defined bistrithiocarbonyl-end functionalized cis-1,4-PI was synthesized via functional metathesis degradation from NR in the presence of second generation Grubbs catalyst and a bistrithiocarbonyl-end functionalized olefin as CTA. The thermal properties of the obtained block copolymers PI-b-P(t-BA), P(t-BA)-b-PI-b-P(t-BA) after RAFT polymerization of t-BA, have been compared to those of the dealkylated copolymers PI-b-P(AA), P(AA)-b-PI-b-P(AA)
Audureau, Nicolas. "Synthèse de (co)polymères à UCST par polymérisation radicalaire contrôlée par RAFT et étude de leur thermosensibilité dans l’eau". Electronic Thesis or Diss., Sorbonne université, 2021. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2021SORUS299.pdf.
Texto completoOver the past decade, polymers exhibiting a UCST type behavior in water have gained more and more interest. Among them, poly(acrylamide-co-acrylonitrile) (P(Am-co-AN)) and poly(N- acryloyl glucinamide) are the most popular. They have been mainly studied for the develoment of new smart systems for biomedical applications. Yet, reproductibility of their synthesis to obtain polymers with the targeted phase transition temperature (TCP) is not always straightforward. In this thesis, we firstly completed previous studies available in the litterature on P(Am-co-AN) by synthesizing it in water using RAFT-controlled radical polymerization. We also developed a new familly of (co)polymers based on N-cyanomethylacrylamide (CMAm) and N-cyanoethylacrylamide (CEAm) exhibiting a UCST-type behavior in water covering a very large range of TCP (~20-85 °C). Moreover, we have shown that block copolymers composed of the former UCST type (co)polymers could be achieved with good polymerization control in water via the PISA-RAFT process using a poly(N,N- dimethylacrylamide) (PDMAc) macroRAFT agent. The process allowed us to obtain thermoresponsive nano-objects of different morpholgies. Remarkably, in the case of PDMAc-b-P(Am- co-AN), we have shown the existence of a partially reversible worms-to-spheres morphological transition induced by heating of the medium. In the case of PDMAc-b-PCMAm diblock copolymers, we have shown that a large range of morphologies, namely spheres, worms and vesicles, was accessible
Elloumi, Amira. "Synthèse de nouveaux polymères issus de la biomasse pour applications dans le domaine des energies alternatives". Thesis, Lyon, 2019. http://www.theses.fr/2019LYSE1271.
Texto completoThe syntheses of partially biobased poly(1,2,3-triazolium)s were first investigated by reversible addition−fragmentation chain transfer (RAFT) polymerization of tailor-made 1,2,3- triazole-functionalized (meth)acrylate monomers derived from levulinic acid followed by N-alkylation of the 1,2,3-triazole moieties and subsequent anion exchange. Control over RAFT polymerization was ascertained, and dormant chain-ends of 1,2,3-triazole-functionalized polymethacrylate could be re-activated to afford neutral and charged BCPs. Sequential RAFT polymerizations of 1,2,3-triazole-functionalized methacrylate and styrene followed by N-alkylation and anion exchange reactions, affords two poly(1,2,3-triazole) and two poly(1,2,3-triazolium)-based diblock copolymers (BCPs) with different weight fractions of each block. Structure/properties relationships of all obtained materials were discussed and ionic conductivity poly(1,2,3-triazolium)s was assessed. The morphological and self-assembling properties of neutral and charged BCPs in bulk and in thin films were investigated
Duc, Sandrine. "Synthèse de (co)polymères d'hex-1-yne et de phénylacétylène par les catalyseurs de Ziegler-Natta et de métathèse : caractérisation de la microstructure des chaines par couplage pyrolyse - chromatographie en phase gazeuse/spectrométrie de masse". Vandoeuvre-les-Nancy, INPL, 1997. http://www.theses.fr/1997INPL044N.
Texto completoBaguenard, Céline. "Synthèse et caractérisation d’architectures macromoléculaires complexes à base d’un bloc « stimuli-responsive »". Thesis, Lyon, INSA, 2012. http://www.theses.fr/2012ISAL0009.
Texto completoPH- or temperature-responsive polymers become hydrophobic from a critical pH or temperature. When they are associated to a hydrophilic block, they may respond to a stimulus by forming reversible micelles in aqueous solution. This thesis mainly deals with the synthesis by controlled radical polymerization of ABC- or ACB-type triple hydrophilic block copolymers, based on a highly hydrophilic block (PEO, A-block), a pH- and temperature-responsive moiety (PDMAEMA, B-block) and a cationic sequence (PDMAEMAquat, C-block). As their characterization by SEC in aqueous phase was not conclusive, they were therefore analyzed by diffusional NMR. In addition, their self-assembly in aqueous solution depending on pH or temperature was studied by 1H NMR and DLS. Furthermore, the cationic C-block form a so-called polyelectrolyte complex with a negatively charged polymer (PSS). Objects resulting from the complexation between the last block of ABC-triblock and PSS were characterized by 1H NMR, DLS, diffusional NMR and TEM. Their behavior in aqueous solution was also investigated depending on pH and temperature
Rahma, Hakim. "Synthèse de nanofilms à greffons dendritiques pour l’immobilisation de biomolécules". Thesis, Bordeaux 1, 2012. http://www.theses.fr/2012BOR14593/document.
Texto completoBiofunctionalization of silica surfaces represents a crucial step for many applications in biotechnology such as biosensing and bioseparation. Monitoring the surface modification of the materials supports can improve their performances for the recognition of biological species. In this work, we have developed functional dendritic organosilanes of first and second generation for chemical modification of surfaces. These dendritic organosilanes RSiX3 (X = Cl or OMe3 or OEt3) were covalently grafted on planar silica or on core-shell superparamagnetic nanoparticles surfaces (gamma-Fe2O3/SiO2). The grafted surfaces were analyzed by AFM and TEM. They were also characterized by Infrared, contact angle and zetametry. These modified surfaces by dendritic molecules have shown high ability to immobilize biological molecules such as protein A or rabbit antibodies
Nguyen, Thi Thao. "Synthèse et étude de dérivés porteurs du motif 1,3-dithiole-2-ylidene actifs en optique non linéaire de deuxième et troisième ordre". Angers, 1996. http://www.theses.fr/1996ANGE0003.
Texto completoBolley, Anaëlle. "Catalyse de la polymérisation pour l'obtention de polyesters à caractères hydrophile biodégradable". Thesis, Strasbourg, 2019. http://www.theses.fr/2019STRAF015.
Texto completoCarbene adducts with Group 13 metal (aluminium, gallium and indium) and a new aluminium cation stabilized by alkyl groups, have allowed the ROP of lactide under mild and simple conditions. In a second step, amphiphilic copolymers were synthesized with poly(ethylene glycol) leading to the desired PEG-co-PLLA. Organometallic complexes have still put forward their advantages by the use of aluminium’s salen allowing to open the way on the ROP of the α-chloro-ε-caprolactone leading to the poly(α-chloro-ε-caprolactone). The formation of new copolymers, diblocks and stereocomplex has afforded to modulate the obtained homopolymer’s properties, confirmed by the use of the various physicochemical measurements effected on the latter. Finally, the partial post-functionalization according to the Williamson reaction followed by the hydrogenation reaction has led to the obtaining of hydrophilic polymers
Hilton, Adam. "Erosion sélective et greffage de copolymères à blocs". Paris 6, 2003. http://www.theses.fr/2003PA066158.
Texto completoRoche, Vincent. "Copolymères à blocs fluorés pour la protection anticorrosion : synthèse et caractérisation". Aix-Marseille 1, 2008. http://www.theses.fr/2008AIX11037.
Texto completoThe objective of the thesis was to reduce the complexity of the systems of paintings by limiting the number of stages necessary for the coating elaboration and by limiting the number of layers. For that purpose, the technology of block copolymers was used. Every block can bring a specific property of one of layers of a complete system. One of the essential properties is the barrier effect against the corrosive species. For that purpose, diblock copolymers PBA-b-PTFEMA and PBA-b-PHFEMA were synthesized by nitroxyde mediated polymerization. These polymers, as monolayer, were characterized by techniques of surface characterization and corrosion protection. These characterizations allowed to show that the block PHFEMA guarantees good barriers properties but presents a low adhesion on steel and aluminium. Consequently, an adhesion promoter was introduced via the grafting on the aluminium surface of -APS which could react afterward via the amine function with a epoxy function incorporated into the (PGMA-r-PBA)-b-PHFEMA polymer. The final coating showed a relative good adhesion on the aluminium. For the corrosion protection, the final system gets a good protection completely comparable to a classic industrial system. Nevertheless, the good results of the (PGMA-r-PBA)-b-PHFEMA polymer with a simple alkaline degreasing tend to show that the epoxy function incorporated into the polymer chain could be directly bound in a covalent way in the aluminium
Hurtrez, Guy. "Etude des copolymères poly(styrène-b-oxyde d'éthylène) : synthèses, propriétés colloïdales et tensio-actives". Mulhouse, 1992. http://www.theses.fr/1992MULH0257.
Texto completoHélou, Marion. "Valorisation de la biomasse pour la synthèse de polycarbonates". Rennes 1, 2010. http://www.theses.fr/2010REN1S204.
Texto completoSeveral heterocyclic six (and five)-membered ring carbonates have been prepared from glycerol as a bioresource. Within green and sustainable chemistry, various catalytic systems have been established for the ring-opening (co)polymerization (ROP) of these cyclic carbonates, with a special emphasis on trimethylene carbonate. A series of organometallic (BDI)Zn[N(SiMe3)2], Lewis acids (Al(OTf)3, Bi(OTf)3) or organic (DMAP, TBD, BEMP) catalysts, in association with an alcohol have been revealed highly active and productive for the controlled « living and immortal » ROP of these (novel) carbonates. The activities (TOFmax = 31 150 h-1) and productivities (TONmax = 46 500 mol/mol) reached with such an atom-saving procedure (20 ppm in initial catalyst content) are exceptional. Depending on the nature of the alcohol, various α-hydroxy, ω-alkoxy ester polycarbonates can be prepared. The choice of a diol or triol as co-initiator/chain transfert agent allowed to access polycarbonates of various topologies, linear or branched. The most significant, the Lewis acid and organocatalysts remain highly efficient in the ROP of technical grade TMC. Copolymerization of these carbonates, especially with lactide, affords copolyesters of variable type (block, random) and architecture (linear, branched), depending on the catalytic system selected. Thermal and mechanical properties, in particular, stiffness and elasticity, may be modulated according to the chemical composition as well
Xiang, Yunjie. "Towards multifunctional supramolecular copolymers". Thesis, Strasbourg, 2014. http://www.theses.fr/2014STRAF015/document.
Texto completoThe goal of this thesis was to understand the supramolecular organization and the possible dynamic rearrangement of multifunctional supramolecular copolymers. To this end, we havedeveloped a series of building blocks based on urea or perylene cores with various lateral side chains for combining structuring, fluorescence, and biorecognition properties in a singlesupramolecular polymer chain. Using a combination of spectroscopy, scattering, and microscopy techniques, we have shown that molecules with a same core but different lateral chains can lead to the formation of various nanostructures su ch as twisted ribbons, 20 plates, or branched fibers. Ultimately, by combining monomeric units with different functional side chains, multifunctional supramolecular copolymers have been obtained. Whereas radiation scattering and imaging techniques were used to demonstrate that one of the monomer can dictate the formation of a preferential nanostructure, optical spectroscopies revealed that the polymerization process of our systems indeed occurs via social self-sorting
Torrès, Ghislaine. "Étude de la réaction d'hydrosilylation et application à la synthèse d'un copolymère à blocs poly(sulfone-b-siloxane) : caractérisation des réactions secondaires". Paris 6, 1986. http://www.theses.fr/1986PA066308.
Texto completoLebarbe, Thomas. "Synthèse de nouveaux polyesters "verts" issus de ressources oléagineuses : application au renfort au choc du poly(L-lactide)". Phd thesis, Université Sciences et Technologies - Bordeaux I, 2013. http://tel.archives-ouvertes.fr/tel-00965638.
Texto completoLosset, Denis. "Réductions biomimétiques chimio et énantiosélectives par des réactifs immobilisés sur des polymères organiques ou minéraux". Rouen, 1990. http://www.theses.fr/1990ROUE5016.
Texto completoBeaune, Olivia. "Préparation de copolymères maléides-éthers vinyliques en série fluorée". Montpellier 2, 1991. http://www.theses.fr/1991MON20187.
Texto completoDestarac, Mathias. "Etude des mécanismes de la polymériation radicalaire contrôlée. Application à la synthèse de copolymères à architecture contrôlée". Montpellier 2, 1997. http://www.theses.fr/1997MON20147.
Texto completoNguyen, Tran Minh Giao. "Synthèse et caractérisation de poly(isoprène-b-carbonate)s dérivés de polyisoprènes hydroxytéléchéliques". Le Mans, 2003. http://cyberdoc.univ-lemans.fr/theses/2003/2003LEMA1021.pdf.
Texto completoYounis, Mira. "Synthèses et caractérisation de nouveaux copolymères pour la visualisation de dispositifs médicaux en imagerie médicale". Thesis, Montpellier, 2015. http://www.theses.fr/2015MONT3506/document.
Texto completoSynthetic polymers are widely used nowadays as prosthetic implants. Unfortunately, these implants are invsisble by magnetic resonance imaging (MRI). The visualization of these implants is a necessity in order to gain information concerning their fixation in the body and post-operation fate. One of the challenges is then to fix a contrast agent on the implant. Thus the objective is to develop novel strategies for the long-term visualization of prosthetic implants by MRI. For this goal, a polymer will first be functionalized with a contrast agent in a covalent way, and then it will be deposited by coating on the surface of the prosthesis. Polymers will be functionalized by free radical polymerization followed by “click chemistry. In a first step, poly(methyl methacrylate-co-propargyl methacrylate) with low molar ratio in propargyl methacrylate (F< 10 %) will be prepared by free radical copolymerization of methyl methacrylate with propargyl methacrylate. In a second step, a novel gadolinium based contrast agent will be grafted by click chemistry onto the propargylated poly(methyl methacrylate) (PMMA-co-PMA) polymer. The obtained polymeric contrast agent will be spread on a commercial polypropylene mesh by the airbrushing technique and the mesh will be assessed for MRI visualization on a 7T instrument. Cytocompatibility and cytotoxicity tests will be performed to evaluate the use of this contrast agent in biomedical applications.At the same time, fluorescence imaging techniques are also gaining popularity. For this, the same synthesized polymer (PMMA-co-PMA) will be attached to different fluorescent precursors: anthracene, fluoresceine, and europium complex
Gineste, Jean-Luc. "Synthèse et caractérisation de nouveaux séparateurs greffés destinés aux accumulateurs au lithium". Montpellier 2, 1992. http://www.theses.fr/1992MON20213.
Texto completoGuyot, Bernard. "Synthèses d'acrylates fluorés alpha-modifiés, polymérisations et applications". Montpellier 2, 1995. http://www.theses.fr/1995MON20091.
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