Equilibrium conformation of polymer chains with noncircular cross section

Details Equilibrium conformation of polymer chains with noncircular cross section Equilibrium conformation of polymer chains with noncircular cross section

2008-05-20

arxiv.org/abs/0805.2994v1

Physical Review E (2006)

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 4 figures

Scientific paper

In this paper we derive the general equilibrium equations of a polymer chain with a noncircular cross section by the variation of the free energy functional. From the equilibrium equation of the elastic ribbon we derive analytically the equilibrium conformations both of the helical ribbons and the twisted ribbons. We find that the pitch angle of the helical ribbons depends on the ratio of the torsional rigidity to the bending one. For the twisted ribbons, the rotation rate depends on the spontaneous torsion, which is determined by the elastic properties of the polymers. Our results for helical and twisted ribbons strongly indicate that the formation of these structures is determined by their elastic properties.

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