Interface Relaxation in Electrophoretic Deposition of Polymer Chains: Effects of Segmental Dynamics, Molecular Weight, and Field

Authors

Frank W. Bentrem, University of Southern Mississippi
Jun Xie, University of Southern Mississippi
Ras B. Pandey, University of Southern MississippiFollow

Document Type

Article

Publication Date

4-1-2002

Department

Physics and Astronomy

School

Mathematics and Natural Sciences

Abstract

Using different segmental dynamics and relaxation, characteristics of the interface growth is examined in an electrophoretic deposition of polymer chains on a three (2+1)-dimensional discrete lattice with a Monte Carlo simulation. Incorporation of faster modes such as crankshaft and reptation movements along with the relatively slow kink-jump dynamics seems crucial in relaxing the interface width. As the continuously released polymer chains are driven (via segmental movements) and deposited, the interface width W grows with the number of time steps t, W∝t^β, (β ~0.4-0.8), which is followed by its saturation to a steady-state value W_s. Stopping the release of additional chains after saturation while continuing the segmental movements relaxes the saturated width to an equilibrium value (W_s → W_r). Scaling of the relaxed interface width W_r with the driving field E, W_r∝E^-1/2 remains similar to that of the steady-state W_s width. In contrast to monotonic increase of the steady-state width W_s, the relaxed interface width W_r is found to decay (possibly as a stretched exponential) with the molecular weight.

Comments

©Physical Review E

Publisher version

Publication Title

Physical Review E

Volume

65

Issue

4

Recommended Citation

Bentrem, F. W., Xie, J., Pandey, R. B. (2002). Interface Relaxation in Electrophoretic Deposition of Polymer Chains: Effects of Segmental Dynamics, Molecular Weight, and Field. Physical Review E, 65(4).
Available at: https://aquila.usm.edu/fac_pubs/3645