ÉTUDE COMPARATIVE DES PROPRIÉTÉS DYNAMIQUES DE DIFFUSION DE COPOLYMÈRES BISÉQUENCÉS LINÉAIRES ET CYCLIQUES FAIBLEMENT CHARGÉS EN SOLUTION.

Abstract

The growing interest in block copolymers in the fields of scientific research and contemporary industrial application is linked to their particular molecular structure which attributes unique properties to them. They possess particular mechanical behaviors and their amphiphilic nature gives them very interesting properties mixed with other species. Thus, in addition to the fascinating fundamental questions of thermodynamics and mechanics raised by obtaining nanoscale architectures on a large scale, their specificities have opened the way for them for many industrial applications in various sectors (adhesives, polymer alloys ...), in which they can be used either as an additive or as the main constituent of the material. This dissertation is a comparative study of the dynamic scattering properties of the linear and cyclic diblock copolymers weakly charged in solution. The first chapter describes the basic concepts that are essential for understanding the physics of neutral and charged polymers in solution, and reviews the work done to date on cyclic diblock copolymers from a theoretical and experimental point of view. As for the second chapter, it describes the theoretical formalism used in the treatment of the static and dynamic scattering properties of the linear and cyclic diblock copolymers weakly charged in solution. The third chapter deals with different applications of the above-mentioned formalism to symmetric and dissymmetric diblock copolymers in solution placed in several charge distributions. The last chapter discusses the main results and reviews the conclusions of interest and some perspectives.