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Home   /   Thesis   /   Solid-state NMR techniques applied to the structural characterization of organic/organic composite materials: nitrogen heterocycles and polymers

Solid-state NMR techniques applied to the structural characterization of organic/organic composite materials: nitrogen heterocycles and polymers

Condensed matter physics, chemistry & nanosciences Physical chemistry and electrochemistry

Abstract

High-performance and safe explosive compositions are organic/organic composite materials in which a nitrated organic constituent is finely mixed with a polymer, as a minor constituent. The properties of these materials are closely linked to their physicochemical and microstructural characteristics. The main objective of the PhD thesis will be the characterization of these new compounds mainly using solid-state NMR spectrometry techniques. The new molecules synthesized have particular chemical structures with few hydrogen atoms and for some, many nitrogen atoms. They will be characterized by hydrogen, carbon and nitrogen NMR and by the study of correlations based on couplings between atoms. These methods will also be tested to probe the molecule/polymer interface, to characterize other systems such as co-crystals or nano-structured assemblies, and finally to study the influence of manufacturing processes or different types of stresses (mechanical or thermal). The very sensitive dynamic nuclear polarization (PND) technique could be evaluated within the framework of a collaboration and other complementary analytical tools available in the laboratory could be used (SEM, X-ray diffraction, IRTF and RAMAN).

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