Secondary super-structures in random copolymers

  • A.N. Semenov


Secondary domain superstructures in correlated random block copolymers are considered theoretically using the concept of the second order parameter related to fluctuations of the local mean block length. It is shown that the size of secondary domains, Λ, is much larger than the primary domain size, L: Λ\( \propto {\varepsilon ^{ - 1}}\), while \(L \propto {\varepsilon ^{ - 1/2}}\), where ε is a small parameter defining the composition asymmetry. Different secondary morphologies are characterized. It is also shown that separation of the system in two macroscopic phases with different primary morphologies predicted earlier using the free energy expansion up to \({\Psi ^4}\) (\({\Psi}\) is the usual order parameter related to local composition) is an artifact of this widely accepted theoretical model.

PACS. 36.20.Ey Conformation (statistics and dynamics) - 61.25.Hq Macromolecular and polymer solutions; polymer melts; swelling - 61.41.+e Polymers, elastomers, and plastics 


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Copyright information

© EDP Sciences, Springer-Verlag 1999

Authors and Affiliations

  • A.N. Semenov
    • 1
  1. 1.Department of Applied MathematicsUniversity of LeedsLeedsUK

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