ИСТИНА

The report is devoted to the study of polymer layers of amphiphilic homopolymers tightly grafted to a flat surface at the nodes of a square lattice. It was shown that, due to the amphiphilicity of monomer units containing groups with different affinities, in a selective solventsuch layers form lamellas perpendicular to the grafting surface, with a period that depends on the grafting density and the solvent quality. The results are presented in the form of a state diagram in variables the energy of attraction of the side groups (effective solvent quality) vs the distance between the grafting points (inversely proportional to the square root of the grafting density). The diagram contains the region of stability of lamellae, lamellae with significantly different periods and a transitional area with a parking garage structure. The diagram is constructed by calculating the layer-by-layer structure factorand the angle of inclination of the lamellae in the layer. The calculations were performed for commensurate cell sizes, determined by a special procedure for each graftingdensity. The results may be interesting not only to specialists in polymer science, but also to all those who investigate the processes of self-organization and rearrangement indense systems. Acknowledgements This research was supported financially by Russian Science Foundation (project number 19-73-20104) and Ministry of Science and Education. The research is carried out using the equipment of the shared research facilities of HPC computing resources at Lomonosov Moscow State University.