Аннотация:The ordering of amphiphilic diblock copolymers in the bulk and under cylindrical confinement is studied via Monte Carlo simulation both visually and based on the structure factor analysis. Depending on the temperature and block architecture, single spherical or cylindrical micelles, lamellae with parallel and mutually orthogonal layers, and bi-continuous structures appear in the bulk, whereas snapshots in cylinders reveal lamellar-catenoid and spiral motifs. The structure factor analysis strongly supports the preferred formation of bi-continuous phases of amphiphilic copolymers in the bulk. The notion of the sectoral structure factor is introduced to extract symmetry information on the structure of cylindrically confined polymers and to prove the ordering reduction in narrow capillaries.