ИСТИНА

The weak segregation theory (WST) of microphase separation in block copolymers (BC) is based on the vision by Landau (1937) and seminal breakthrough by Leibler (1980) into microscopic theory. The theory is especially helpful in the situation when one tries to form the well reproducible ordered morphologies, for which purpose they are to be formed as smoothly as possible, i.e. near the corresponding critical point. Even though the WST predictions hold quantitatively in a small vicinity of the critical point only, this shortcoming could be avoided via so-called WST guided self-consistent field theory (SCFT), which combines the advantages of both the WST (comparatively simple finding the relationship between the architecture of block copolymers and nanostructures' morphology) and SCFT (knowing how to tackle quantitatively the emerging nanostuctures at intermediate segregations). Among other new results in this field, I address the following issues: i) non-conventional (in particular, diamond-like) morphologies in ternary ABC block copolymers in the bulk and thin films; ii) the WST analysis of the non-centrosymmetric lamellar structures in the blends of the ternary and binary BC; and iii) formation of the multicompartment or "structure-in-structure" morphologies (in particular, structured spherical and cylindrical micelles) in block copolymers of complicated architecture.