Search results for "polymérisation"
showing 4 items of 4 documents
Synthèse et formulation de résines photopolymérisables issues de la biomasse : application pour l'impression Braille
2014
The 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 …
Electrochemical reactivity of magnesium porphine : functionalization, oligo-polymerization and application to the synthesis of porphyrins and multi-p…
2012
This work deals with the redox reactivity of magnesium porphine, the study of its electropolymerization and resulting materials, of its functionalization by nucleophiles as well as the mechanistic investigation of the C-C oxidative coupling on a tris-meso-substituted porphyrin model.The electrochemical oxidation of magnesium porphine to its cation radical leads to oligomers in solution and polymers on the electrode, which molecular structure depends on the imposed potential. The reactivity of the cation radical has also been exploited by adding sufficient amount of nucleophiles (pyridine and triphenylphosphine) in the reactional in order to inhibit the oligomerization/polymerization process…
Synthesis of low density foam shells for inertial confinement fusion experiments
2011
This work deals with the fabrication process of low density foam shells and the sharp control of their shape (diameter, thickness, density, sphericity, non-concentricity). During this PhD we focused on the non-concentricity criterion which has to be lower than 1%. The shells are synthesized using a microencapsulation process leading to a double emulsion and followed by a thermal polymerization at 60°C. According to the literature, three major parameters, the density of the three phases, the deformations of the shells along the process and the kinetics of the polymerization have a direct influence on the shells non-concentricity. The results obtained showed that when the density gap between …
NF ISO 14239 - Qualité du Sol - Systèmes d’incubation de laboratoire destinés à la mesure de la minéralisation de produits chimiques organiques dans …
2017
EA BIOME INRA; Le présent document spécifie les étapes principales d’une méthode d’amplification par réaction de polymérisation en chaîne (PCR) quantitative (qPCR) permettant de mesurer Domaine d'application Le présent document définit six systèmes d'incubation appropriés permettant de mesurer les vitesses et l'étendue de la minéralisation de composés organiques dans le sol par mesurage du dégagement de dioxyde de carbone (CO2) . Tous les systèmes d'incubation peuvent être utilisés avec des composés solubles ou insolubles, mais le choix du système dépend des objectifs globaux de l'étude. Le présent document ne s'applique pas à l'utilisation desdits systèmes pour les bilans de masse, qui son…