Europhys. Lett.
Volume 62, Number 6, June 2003
Page(s) 848 - 854
Section Condensed matter: structure, mechanical and thermal properties
Published online 01 June 2003
DOI: 10.1209/epl/i2003-00450-8
Europhys. Lett., 62 (6) , pp. 848-854 (2003)

Dynamics of the constrained polymer collapse

I. S. Aranson1 and L. S. Tsimring2

1  Materials Science Division, Argonne National Laboratory 9700 S. Cass Avenue, Argonne, IL 60439, USA
2  Institute for Nonlinear Science, University California, San Diego La Jolla, CA 92093-0402, USA

(Received 27 January 2003; accepted in final form 15 April 2003)

The dynamics of polymer collapse with a fixed distance between endpoints is studied analytically and numerically by the Nosé-Hoover algorithm. We find that at the pearling stage of the collapse the number of pearls decays as t-1/2 leading to anomalously long collapse time. To understand the effect of Stokes drag we reduced the problem of long-polymer-chain collapse to the one-dimensional diffusion-limited coalescence of particles with the mass-dependent mobility. In this case the number of pearls decays slower, as t-3/7.

61.25.Hq - Macromolecular and polymer solutions; polymer melts; swelling.
83.10.Rs - Computer simulation of molecular and particle dynamics.

© EDP Sciences 2003