WorldCat Identities

Cramail, Henri (1964-....).

Overview
Works: 88 works in 96 publications in 2 languages and 99 library holdings
Roles: Thesis advisor, Opponent, Other, Author
Publication Timeline
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Most widely held works by Henri Cramail
Elaboration de polymères hydrocarbonés denses par polymérisation coordinative : mécanismes élémentaires et synthèse macromoléculaire by Séverine Gomont( Book )

2 editions published in 2001 in French and held by 2 WorldCat member libraries worldwide

L'objectif de ce travail est de synthétiser des polymères hydrocarbonés de densité élevée pouvant être utilisés comme charge dense dans les propergols. La polymérisation par coordination de monomères comme les cyclo-oléfines tendues et les monomères vinyliques aromatiques répond à ces objectifs. Une première partie du manuscrit est consacrée à l'étude de la polymérisation des monomères denses par des catalyseurs a-diimine NiBr2 activés par un dérivé aluminique et à la compréhension des mécanismes élémentaires de réaction. Une deuxième partie est consacrée à l'étude de la polymérisation des mêmes monomères par d'autres complexes à base de nickel et de palladium. Il a ainsi été possible de synthétiser des polymères de densité supérieure à 1,10 et des copolymères à blocs poly(2-vinylnaphthalène)-b-polyisoprène permettant d'assurer la compatibilité de la charge dense avec les autres constituants des propergols
Elaboration par voie sol-gel non-hydrolytique de catalyseurs métallocènes supportés sur silice : application à la polymérisation des oléfines by Cédric Dever( Book )

2 editions published in 2005 in French and held by 2 WorldCat member libraries worldwide

Une nouvelle voie d'hétérogénéisation de catalyseurs métallocène est proposée. Elle consiste à élaborer par condensation non-hydrolytique des réseaux de silice dans lesquels une partie des atomes de silicium portent deux groupes indényle, puis à métaller ces groupes pour générer des sites catalytiques de type métallocène. Le comportement des systèmes catalytiques supportés ainsi préparés a ensuite été étudié en polymérisation de l'éthylène. Les activités de polymérisation peuvent atteindre 190 grammes de polyéthylène par gramme de catalyseur par heure et par bar. L'influence de la préparation et de la composition des systèmes supportés sur la polymérisation de l'éthylène et sur les caractéristiques moléculaires et thermomécaniques des polyéthylènes a également été évaluée
Fractionnement et caractérisation des polymères par chromatographie liquide au point de transition exclusion-adsorption by Katia Baran( Book )

2 editions published in 1999 in French and held by 2 WorldCat member libraries worldwide

L'ETUDE DES PHENOMENES GOUVERNANT LES PROCESSUS DE SEPARATION DES POLYMERES PAR CHROMATOGRAPHIE LIQUIDE DANS LE MODE PARTICULIER D'ELUTION AU POINT DE TRANSITION EXCLUSION-ADSORPTION (ENCORE APPELE CONDITIONS CRITIQUES) FAIT L'OBJET DE CE TRAVAIL DE THESE. LA PARTICULARITE DE LA TECHNIQUE EMPLOYEE EST DE RENDRE INVISIBLE LA DISTRIBUTION EN MASSES MOLAIRES DES CHAINES POLYMERES ET DE SEPARER CELLES-CI SEULEMENT EN FONCTION DES HETEROGENEITES (FONCTION TERMINALE, BLOC D'UN COPOLYMERE, TYPE D'ARCHITECTURE, ETC) QU'ELLES PORTENT. LA MESURE DES DIMENSIONS MOYENNES DES CHAINES POLYMERES DANS L'ELUANT DE COMPOSITION CRITIQUE ET L'ETUDE DE L'INFLUENCE DE LA TEMPERATURE SUR LES PHENOMENES D'INTERACTION ONT NOTAMMENT PERMIS D'APPREHENDER LES PARAMETRES QUI REGISSENT CE MODE D'ELUTION. PARALLELEMENT, LE FRACTIONNEMENT ET LA CARACTERISATION DE DIVERSES ARCHITECTURES A BASE DE POLYSTYRENE ET DE POLY(OXYDE D'ETHYLENE) (HOMOPOLYMERES FONCTIONNELS, COPOLYMERES A BLOCS ET MACROCYCLES) ONT PU ETRE REALISEE
Evaluation of DNA damage and cytotoxicity of polyurethane-based nano- and microparticles as promising biomaterials for drug delivery systems by Thiago Caon( )

1 edition published in 2009 in English and held by 2 WorldCat member libraries worldwide

Elaboration de particules de polyuréthane dans le dioxyde de carbone supercritique : de l'étude des interactions moléculaires à la polymérisation by Benjamin Renault( Book )

2 editions published in 2007 in French and held by 2 WorldCat member libraries worldwide

Well defined core shell polyurethane particles were synthesized by step growth polymerization between short aliphatic diols, i.e. ethylene glycol (EG), 1,4-butanediol (BD) or polyethylene oxide (PEO Mn = 200 g.mol-1), and tolylene-1,4-diisocyanate (TDI) in the presence of reactive polydimethylsiloxane (PDMS) or poly(1,1,2,2-tétrahydroperfluorodécyle acrylate) stabilizers. The system was investigated by means of infrared spectroscopy combined to molecular modelling (i. e. ab initio and DFT calculations). Specific interactions between diols and CO2 inducing an enhancement of the polarization of the hydroxyl groups and consequently an increase of the OH nucleophilicity were pointed out. The high molar mass resulting polyurethane materials were found to exhibit superhydrophobic properties
Oligomérisation fonctionnelle du norbornène : application à la synthèse de réseaux by Henri Cramail( Book )

2 editions published in 1990 in French and held by 2 WorldCat member libraries worldwide

LA POLYMERISATION METALLA-CARBENIQUE (PAR REACTION DE METATHESE) DU NORBORNENE EN PRESENCE DE DIESTERS INSATURES A PERMIS D'OBTENIR DES OLIGOMERES DU NORBORNENE PORTEURS DE FONCTIONS ESTER AUX EXTREMITES DES CHAINES. LES DIESTERS DERIVES D'ACIDES ETHYLENIQUES SE SONT AVERES LES MEILLEURS AGENTS DE TRANSFERT ET CONDUISENT A DES OLIGOMERES DE FONCTIONNALITE PROCHE DE DEUX. UNE ETUDE CINETIQUE DU PROCESSUS A ETE REALISEE ET A PERMIS DE PROPOSER UN MECANISME DE LA REACTION. CES OLIGOMERES ONT ETE ENSUITE TRANSFORMES EN PREPOLYMERES HYDROXY-TELECHELIQUES LESQUELS PEUVENT ETRE UTILISES COMME PRECURSEURS DE RESEAUX POLYURETHANE. LES PROPRIETES PHYSICO-CHIMIQUES ET THERMO-MECANIQUES DE CES RESEQUX ONT ETE EVALUEES
Élaboration en milieu dispersé de matériaux polyuréthane à structure cœur-écorce by Bindushree Radhakrishnan( Book )

2 editions published in 2002 in English and held by 2 WorldCat member libraries worldwide

Des particules polyuréthane (PUR) de type "coeur-écorce" ont été élaborées par des techniques dispersives en présence d'agents stabilisants polymères réactifs (surfmers). Ces derniers de nature chimique polystyrène, polybutadiène ou poly(acrylate de n-butyle) et porteurs d'une ou deux fonctions hydroxyle en bout de chine ont été synthétisés par polymérisations anionique "vivante" et radicalaire "contrôlée". L'influence de la masse molaire, de la valence et de la concentration en agent stabilisant, sur la taille moyenne des particules PUR obtenues, a été analysée et discutée. Les particules constituées d'un coeur polyuréthane et d'une écorce poly(acrylate de n-butyle) trouvent des applications originales dans le domaine des adhésifs sensibles à la pression (PSA)
Elaboration de particules de polyuréthane à structure cœur-écorce en dispersion organique et dans le dioxyde de carbone supercritique by Pierre Chambon( Book )

2 editions published in 2005 in French and held by 2 WorldCat member libraries worldwide

Des particules calibrées de polyuréthane à structure coeur-écorce ont été synthétisées par polyaddition entre le tolylène 2,4-diisocyanate (TDI) et l'éthylène glycol (EG) en milieu dispersant organique (cyclohexane) et dans le dioxyde de carbone supercritique, en présence d'agents stabilisants réactifs de type polyacrylates et polydiméthylsiloxanes. L'analyse de l'influence de divers paramètres réactionnels couplée à des études cinétiques et spectroscopiques ont permis de proposer un mécanisme de formation des particules, à la fois dans le cyclohexane et dans le dioxyde de carbone supercritique. Différentes voies de valorisation de ces particules à structure coeur-écorce ont été explorées selon la nature chimique du stabilisant réactif (écorce) utilisé
Nouvelle approche en catalyse supportée de polymérisation de l'éthylène : conception de supports organiques originaux by Cécile Bouilhac( Book )

2 editions published in 2007 in French and held by 2 WorldCat member libraries worldwide

Functionalized organic supports have been developed for the heterogenization of single-site catalysts towards ethylene polymerization. A first approach consists in the synthesis of star-like PS composed of a microgel core and PS arms end-capped by various functions. These latter can either immobilize or generate in-situ aluminic activators of metallocenes and late transition metal complexes. A second strategy is based on the self-assembly of functional (co)polymers in solution. The so-formed micellar structures are capable of embedding the catalytic system and can serve as nanoreactors for the production of polyethylene beads. Tested in ethylene polymerization in the presence of iron-based complexes (MeDIP(2,6-iPrPh2)FeCl2), these different systems enable the production, with a high catalytic activity, of well-defined polyethylene beads
Synthesis of uniform polyurethane particles by step growth polymerization in a dispersed medium by Bindushree Radhakrishnan( )

1 edition published in 2002 in English and held by 2 WorldCat member libraries worldwide

Bio-inspired films based on chitosan, nanoclays and cellulose nanocrystals: structuring and properties improvement by using water-evaporation-induced self-assembly by Daniela Enescu( )

1 edition published in 2019 in English and held by 2 WorldCat member libraries worldwide

Vegetable oils as a platform for the design of sustainable and non-isocyanate thermoplastic polyurethanes. by Lise Maisonneuve( )

1 edition published in 2013 in English and held by 1 WorldCat member library worldwide

This thesis aims to synthesize more sustainable thermoplastic polyurethanes from vegetable oil derivatives. The first route that has been investigated is based on the well-known reaction between a diol and a diisocyanate. Then to avoid the use of diisocyanates, the route via the polyaddition of a bis cyclic carbonate and a diamine have been studied as well. For this purpose, bifunctional precursors such as diols, bis 5- and 6-membered cyclic carbonates and diamines have been prepared from sunflower oil derivative (methyl oleate) and castor oil derivatives (methyl undecenoate and sebacic acid) The thermo-mechanical properties of the PUs have been modulated by designing and selecting the chemical structure of the (fatty acid-based) monomers. The performed model reaction kinetics revealed the higher reactivity of the 6-membered cyclic carbonates compare to the 5-membered ones. Finally, the developed route to fatty acid-based diamines via dinitriles synthesis in mild conditions was really efficient and this route is really promising to develop a fatty acid based-diamines platform and fully bio-based poly(hydroxyurethane)s
Valorisation des xylanes du bois : vers la synthèse de copolymères amphiphiles bio-sourcés by Maud Chemin( )

1 edition published in 2014 in French and held by 1 WorldCat member library worldwide

This 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
Fatty acid-based thermoplastic poly(ester-amide) as toughening and crystallization improver of poly(l-lactide)( )

1 edition published in 2015 in English and held by 1 WorldCat member library worldwide

Graphical abstract: Highlights: A novel semi-crystalline poly(ester amide), PEA, from fatty acid was designed. Blends of PLLA (90 wt%) with PEA (10 wt%) exhibit ductile mechanical properties. PEA enhances the crystallization rate of PLLA. Abstract: Polylactide (PLA) is a bio-based and compostable aliphatic polyester that has gained widespread interest during the last decades due to its promising technical substitution potential. Its good mechanical properties comparable to some mainstream petroleum based thermoplastics are however counterbalanced by its inherent brittleness that limits its scope of applications. Toughening of PLA by blending with a rubber phase is the most used solution to reduce its brittleness because of economical and practical advantages that offers this modification pathway. In this study, we investigated by melt-blending, the use of a thermoplastic elastomer poly(ester-amide) (PEA), synthesized from fatty acid-based precursors, as an impact modifier of poly(l -lactide) (PLLA). This PEA demonstrated an effective rubber-toughening of PLLA. Moreover, beneficial effects of the PEA on the crystallization rate of PLLA were observed thus enlarging the scope of applications for the obtained blends
Dispersions aqueuses de polyuréthanes bio-sourcés sans isocyanates by Estelle Rix( )

1 edition published in 2015 in French and held by 1 WorldCat member library worldwide

Polyurethanes are a major polymer family; they are industrially obtained from phosgene derivatives: isocyanates. In order to avoid the use of such toxic compounds and to promote the use of biomass, this thesis investigates the synthesis of aqueous dispersions of nonisocyanate polyurethanes derived from vegetable oils. Two synthesis pathways have been studied; transurethanization and aminolysis of cyclic carbonates. Bis-carbamates and biscyclic carbonates were synthesized from fatty acids, and their polymerizations with diols or diamines were studied in bulk. The two routes allow the production of polyurethanes in a few hours at 20-130°C. Sodium methoxide is used as catalyst for transurethanization reactions while the other synthesis pathway does not require catalysts to proceed. Polyurethanes obtained have molar mass (Mn) around 5-17kg.mol-1, which is in accordance with the literature. The polymerization in aqueous miniemulsion was then investigated for the synthesis of polyurethane by aminolysis of cyclic carbonates. Many formulation experiments were necessary to achieve stable miniemulsion and latex; aqueous dispersions of bio-based non-isocyanate polyurethanes were then obtained
Extraction de dérivés de la biomasse lignocellulosique pour la synthèse de tensioactifs bio-sourcés by Pauline Vincent( )

1 edition published in 2020 in French and held by 1 WorldCat member library worldwide

Ce travail de thèse traite de l'extraction d'acides carboxyliques hydroxylés issus de la biomasse lignocellulosique pour élaborer des tensioactifs bio-sourcés. Ces acides, dérivés de la cuisson en milieu basique du bois et de la purification en milieu basique des pâtes cellulosiques, sont obtenus sous la forme d'un mélange dans des liqueurs industrielles. Dans ce mélange, cinq acides hydroxylés majoritaires ont été identifiés et quantifiés, dont trois monohydroxyacides et deux polyhydroxyacides, ou acides sacchariniques. Une étude sur l'extraction et le fractionnement du mélange d'acides hydroxylés d'un filtrat alcalin a préalablement été réalisée. Après une première étape d'élimination de la lignine du filtrat alcalin par acidification, deux voies ont été étudiées pour extraire le mélange d'acides hydroxylés : une méthode basée sur l'estérification et une autre sur l'extraction réactive. Ces deux stratégies ont permis le fractionnement des hydroxyacides et des acides sacchariniques. En parallèle, la formation de ces acides hydroxylés a été étudiée par dépolymérisation des hémicelluloses isolées d'une pâte cellulosique. Un procédé en trois étapes a permis d'extraire et d'identifier deux types d'hémicelluloses. La dégradation de ces hémicelluloses en milieu basique a ensuite permis de comprendre la formation de ces acides hydroxylés en mélange. Dans une dernière partie, la synthèse de tensioactifs non-ioniques monocaténaires et bolaformes à partir des acides carboxyliques hydroxylés a été réalisée et leurs propriétés physico-chimiques étudiées
Synthesis and photovoltaic applications of novel copolymers based on poly(3-hexylthiophene) by Harikrishna Erothu( )

1 edition published in 2011 in French and held by 1 WorldCat member library worldwide

The performance of organic photovoltaic cells mainly depends on the active layer nano-morphology. Rod-coil block copolymers (BCPs) are well known in their ability to self-assemble into well-ordered nanoscopic morphologies. BCPs containing electron-donor and acceptor segments are of particular interest for use in photovoltaic cells because electronic light-excited states exist over distances similar to the typical size of block copolymer domains (~10 nm). Therefore, we designed novel donor-acceptor BCPs to exploit this coincidence in dimensions. This thesis is focused on BCPs based on regioregular poly(3-hexylthiophene) (rr-P3HT) due to its high hole mobility and good processibility from various solvents. Simplified and versatile syntheses of donor-acceptor rod-coil di- and tri- BCPs consisting of the donor block P3HT (rod) and polystyrene or poly(4-vinylpyridine) (coil) blocks to carry the acceptor C60 in different ways were developed. These materials were used as surfactants to stabilize the nano-morphology of reference P3HT: [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) based devices. Photovoltaic characterizations were then tied to copolymer structural data with the help of AFM and a range of complementary characterization techniques
Design of Waterborne Isocyanate-free Poly(Hydroxy Urethane)s - Poly(Butyl Methacrylate) Hybrids via Miniemulsion and Properties of the Cast Films by Boris Bizet( )

1 edition published in 2020 in English and held by 1 WorldCat member library worldwide

The objective of this thesis consists in the development of waterborne hybrid polymers composed of vegetable oil-based poly(hydroxy urethane) - PHU - and poly(butyl methacrylate) - polyBMA. To do so, the design of fatty-acid based bis-cyclic carbonates, as well as their behavior in the bulk polymerization with fatty-acid based diamines was firstly studied. The bis-cyclic carbonate structure was found to influence the microstructure of the formed poly(hydroxy urethane)s as well as the properties of the resulting poly(hydroxy urethane)s. Secondly, the design of waterborne PHU-PolyBMA polymer-polymer hybrids was performed using a miniemulsion process. Both non-crosslinked and crosslinked formulations were developed and compared with respect to kinetics, particle morphology, film formation ability and film morphology. On the one hand, in the case of non-crosslinked hybrids, the ratio between the PHU and the acrylic phase was found to have a strong impact onto the film casting ability as well as the extent of phase segregation. On the other hand, the influence of grafting was analyzed and it was shown to be a potential solution towards the formation of more homogeneous films, exhibiting tunable mechanical properties
Synthèse de polyuréthanes par organo-catalyse dans le dioxyde de carbone supercritique by Christopher Smith( )

1 edition published in 2012 in French and held by 1 WorldCat member library worldwide

The organocatalysed synthesis of polyurethane particles in supercritical carbon dioxide has been studied. Model reactions were first carried out in supercritical CO2 and monitored by in situ infrared spectroscopy in order to indentify the most efficient catalysts for the urethanisation reaction. A series of CO2-philic silicone polymers, end-functionalised with the organocatalytic group (organocatasurfs), were then synthesised and tested in supercritical CO2 for the dispersion polymerisation of polyurethane
Synthesis and functionalization of fatty acid-based hyperbranched polymers by Quentin Passet( )

1 edition published in 2019 in French and held by 1 WorldCat member library worldwide

The aim of this thesis is to valorize oilseed biomass through the polymerization of building block, stemming from vegetable oils, into hyperbranched polymers. This research involves the synthesis and purification of a new bio-based monomer, coined as 10,11- epoxyundecanol (EUnd), which ring-opening multibranching polymerization (ROMBP) has generated bio-based hyperbranched polyethers (hbPEUnd). Conditions of polymerization have been studied in order to maximize yields of reaction and control both the chemical structure and the properties of hbPEUnd. Copolymerization of EUnd with glycidol has also been implemented, yielding hyperbranched copolyethers with varied properties (e.g. solubility). The second part of this work has been dedicated to the functionalization of bio-based hyperbranched polyesters, developed in the frame of a former project. Appropriate derivatizations have provided these modified polyesters with solubility in polar solvents and made them employable as curing agents
 
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Audience level: 0.94 (from 0.88 for Fatty acid ... to 0.97 for Bio-inspir ...)

Languages
French (20)

English (8)