Relaxation modes and rates of a single polymer chain in a periodic array of obstacles

Katsumi Hagita, Hiroshi Takano

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The relaxation modes and rates of a single polymer chain in the two-dimensional space with periodically placed obstacles are studied by Monte Carlo simulations. The bond fluctuation model is used as a model of a polymer chain. The excluded volume interactions between segments are taken into account. Each segment of the polymer chain occupies a square of width 2a, where a is the lattice constant of the square lattice used in the bond fluctuation model. The obstacles are squares of width 8a and form a square lattice with the lattice constant 16a. From the lattice model of reptation, it is expected that a polymer chain in the periodic array of obstacles shows the reptation behavior. The behavior of the pth slowest relaxation rate of a polymer chain of N segments is found to agree with the prediction λp α p2/N3. The behaviors of the diffusion constant of the center of mass and the radius of gyration are also consistent with the relation DGp=1 α R2g, which is expected from the reptation theory.

Original languageEnglish
Pages (from-to)400-401
Number of pages2
JournalProgress of Theoretical Physics Supplement
Issue number138
DOIs
Publication statusPublished - 2000 Jan 1

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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