Analysis of the static properties of cluster formations in symmetric linear multiblock copolymers

Details Analysis of the static properties of cluster formations in symmetric linear multiblock copolymers Analysis of the static properties of cluster formations in symmetric linear multiblock copolymers

2011-04-22

arxiv.org/abs/1104.4919v1

J. Phys.: Condens. Matter 23 (2011) 235106

Physics

Condensed Matter

Soft Condensed Matter

17 pages, 9 figures, accepted for publication in J. Phys.: Condens. Matter

Scientific paper

10.1088/0953-8984/23/23/235106

We use molecular dynamics simulations to study the static properties of a single linear multiblock copolymer chain under poor solvent conditions varying the block length $N$, the number of blocks $n$, and the solvent quality by variation of the temperature $T$. We study the most symmetrical case, where the number of blocks of monomers of type A, $n_{A}$, equals that of monomers B, $n_{B}$ ($n_{A}=n_{B}=n/2$), the length of all blocks is the same irrespective of their type, and potential parameters are also chosen symmetrically, as for a standard Lennard-Jones fluid. Under poor solvent conditions the chains collapse and blocks with monomers of the same type form clusters, which are phase separated from the clusters with monomers of the other type. We study the dependence of the size of the formed clusters on $n$, $N$ and $T$. Furthermore, we discuss our results with respect to recent simulation data on the phase behaviour of such macromolecules, providing a complete picture for the cluster formations in single multiblock copolymer chains under poor solvent conditions.

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