Abstract
A self-consistent mean-field computer simulation of ordering in blends of flexible and rigid rodlike diblock copolymers is performed. Each type of rigid block is selective toward one of the types of flexible blocks and is incompatible with the other. Flexible diblocks form a predominant component of the blend with parameters providing formation of a stable hexagonal morphology. As a result, orientational ordering is induced in the blend by a minor admixture of rigid diblocks, while the type of ordering is determined by the composition of the rigid diblocks. Three different types of orientational ordering, which having a clearly pronounced electromagnetic analogy, are established during variation in the composition of the rigid diblocks. Near a cylindrical micelle of the hexagonal morphology, the vector fields of primary directions of the orientational-order-parameter tensors for the three orientation types are highly similar to the magnetic field of the infinitely long rectilinear direct current, the cylindrical solenoid magnetic field with a constant linear current density, and the electrostatic field of a uniformly charged straight line, respectively.
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