Dynamics of the swelling or collapse of a homopolymer
Service de Physique Théorique,
Centre d'Etudes de Saclay, CEA, 91191 Gif-sur-Yvette,
Corresponding author: firstname.lastname@example.org
Accepted: 17 December 1997
We study the dynamics of a polymer when it is quenched from a θ to a good or bad solvent, by means of a Langevin equation. The variation of the radius of gyration is studied as a function of time. For the first stage of collapse or swelling, the characteristic time scale is found to be proportional to . Other scaling laws are derived for the diffusion regime at larger times. Although the present model is solved only for homopolymers and does not include hydrodynamic interactions, these results may be a first step towards the understanding of the early stages of protein folding.
PACS: 83.10.Nn – Polymer dynamics / 87.15.Da – Physical chemistry of solutions of biomolecules; condensed states / 05.40.+j – Fluctuation phenomena, random processes, and Brownian motion
© EDP Sciences, 1998