Block copolymer self-assembly: homopolymer additives and multiple length scales : a theoretical study

This thesis is devoted to a theoretical study of self-assembly in specific block-copolymer systems. The ability of block copolymer-based systems to organize at the nanoscale level depends on several parameters, such as volume fraction of the different components, their molar masses and the strength of the interactions. This work in its main part presents a theoretical analysis of two different classes of nanostructured systems: a lamellar self-assembled diblock copolymer/homopolymer blend where the homopolymer component interacts favorably with one of the blocks of the diblock copolymer, and lamellar-in-lamellar self-assembled linear binary and ternary two-length-scale multiblock copolymers. The lamellar-in-lamellar self-assembled states of the latter, are analysed in detail in this thesis.