Phase behavior of symmetric linear multiblock copolymers

Details Phase behavior of symmetric linear multiblock copolymers Phase behavior of symmetric linear multiblock copolymers

2011-02-02

arxiv.org/abs/1102.0413v1

Europhys. Lett. 93, 43001 (2011)

Physics

Condensed Matter

Soft Condensed Matter

5 pages, 4 figures, to be published in Europhys. Lett

Scientific paper

10.1209/0295-5075/93/43001

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 were equal ($N_{A}=N_{B}=N$), as well as the number of blocks ($n_{A}=n_{B}=n$). 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 can not take place. For very high number of blocks $n$ and very high $N$ (not accessible to our simulations) further investigation is needed.

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