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  Deviations from the mean-field predictions for the phase behaviour of random copolymers melts

Houdayer, J., & Müller, M. (2002). Deviations from the mean-field predictions for the phase behaviour of random copolymers melts. Europhysics Letters, 58(5), 660-665.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-65D8-9 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-65DA-5
Genre: Journal Article

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 Creators:
Houdayer, J.1, Author              
Müller, M., Author
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1MPI for Polymer Research, Max Planck Society, ou_1309545              

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 Abstract: We investigate the phase behaviour of random copolymers melts via large-scale Monte Carlo simulations. We observe macrophase separation into A- and B-rich phases as predicted by the mean- field theory only for systems with a very large correlation lambda of blocks along the polymer chains, far away from the Lifshitz point. For smaller values of lambda, we find that a locally segregated, disordered microemulsion-like structure gradually forms as the temperature decreases. As we increase the number of blocks in the polymers, the region of macrophase separation further shrinks. The results of our Monte Carlo simulation are in agreement with a Ginzburg criterium, which suggests that the mean-field theory becomes worse as the number of blocks in polymers increases.

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Language(s): eng - English
 Dates: 2002-06
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: No review
 Identifiers: eDoc: 28704
ISI: 000176072200004
 Degree: -

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Title: Europhysics Letters
  Alternative Title : Europhys. Lett.
Source Genre: Journal
 Creator(s):
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Publ. Info: -
Pages: - Volume / Issue: 58 (5) Sequence Number: - Start / End Page: 660 - 665 Identifier: ISSN: 0295-5075