Volume 93, Number 4, February 2011
|Number of page(s)||5|
|Section||Atomic, Molecular and Optical Physics|
|Published online||24 February 2011|
Phase behavior of symmetric linear multiblock copolymers
Faculty of Physics, University of Vienna - Boltzmanngasse 5, A-1090 Vienna, Austria, EU
2 Institute for Theoretical Physics and Center for Computational Materials Science, Vienna University of Technology Hauptstraße 8-10, A-1040 Vienna, Austria, EU
3 Vienna Computational Materials Laboratory - Sensengasse 8/12, A-1090 Vienna, Austria, EU
4 Department of Materials Science, University of Patras - 26504 Patras, Greece, EU
Accepted: 1 February 2011
Molecular-dynamics simulations are used to study the phase behavior of a single linear multiblock copolymer with blocks of A- and B-type monomers under poor solvent conditions, varying the block length N, number of blocks n, and the solvent quality (by variation of the temperature T). The fraction f of A-type monomers is kept constant and equal to 0.5, and always the lengths of A and B blocks are equal (NA = NB = N), as well as the number of blocks (nA = nB). We identify the three following regimes where: i) full microphase separation between blocks of different type occurs (all blocks of A-type monomers form a single cluster, while all blocks of B-type monomers form another); ii) full microphase separation is observed with a certain probability; and iii) full microphase separation cannot take place. For a very high number of blocks n and very high N (not accessible to our simulations) further investigation is needed.
PACS: 36.20.-r – Macromolecules and polymer molecules / 64.75.Yz – Self-assembly / 64.75.Gh – Phase separation and segregation in model systems (hard spheres, Lennard-Jones, etc.)
© EPLA, 2011
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