PATTERN-FORMATION IN DRIVEN COPOLYMER SYSTEMS

The microphase separation of symmetric diblock copolymers in the prese nce of an external force field is simulated by means of a cell dynamic al system model. It is found that the pattern formation is greatly aff ected by the presence of the field and by the type of boundary conditi ons considered. With hard wall boundary conditions and a small applied field the formation of well ordered lamellae, parallel to the wall, i s observed. For a system with periodic boundary conditions the lamella e are oriented parallel to the external field. (C) 1998 Elsevier Scien ce B.V. All rights reserved.