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

Abstract

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.

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

References in corpus (5)

• Helical structures from an isotropic homopolymer model
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Cited by in corpus (3)

• Molecular dynamics simulations of single-component bottle-brush polymers with a flexible backbone under poor solvent conditions
• A study for the static properties of symmetric linear multiblock copolymers under poor solvent conditions
• Phase behaviour of two-component bottle-brush polymers with flexible backbones under poor solvent conditions