Secondary super-structures in random copolymers |
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Authors: | AN Semenov |
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Institution: | (1) Department of Applied Mathematics, University of Leeds, Leeds LS2 9JT, UK, GB |
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Abstract: | 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,
, is much larger than the primary domain size, L: , while , where 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 ( is the usual order parameter related to local composition) is an artifact of this widely accepted theoretical model.
Received 15 July 1998 and Received in final form 18
January 1999 |
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Keywords: | 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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