The present project entitled « polytetra-aza » aims to : 1) Develop and synthesize original polymers based on the tetrazene function, with a bond sequence of three nitrogen bonds N-N/N=N/N-N. In order to incorporate the tetrazene moiety, as a repeating unit, in the main polymeric chain, we will use two synthesis strategies, either by polycondensation AA/BB starting from tetrazenic monomers, or by polyoxidation of bishydrazines. Accessing these tetrazenic and bishydrazinic monomers will be based on recent synthesis studies and preliminary results carried out at LHCEP. 2) Characterize the synthesized novel polytetrazene families and establish ageing studies on them in order to discuss their stabilities and their recycling into useful synthons by depolymerization. 3) Investigate some important properties stemming from the presence of the tetrazene moiety as a repeating unit within the polymeric backbone. a) We will test their capacity to chelate metal ions and to form metallo-polymer assemblies, and thus potentially to have new depolluting or catalytic polymers. b) We will explore the generation of N radicals by homolytic dissociation of the tetrazene motif, under acidic conditions, releasing N2 (g), and thus making it possible to initiate radical polymerizations.