Density and Conformation with Relaxed Substrate, Bulk, and Interface in Electrophoretic Deposition of Polymer Chains

Authors

F.W. Bentrem, University of Southern Mississippi
J. Xie, University of Southern Mississippi
Ras B. Pandey, University of Southern MississippiFollow

Document Type

Article

Publication Date

9-13-2002

Department

Physics and Astronomy

School

Mathematics and Natural Sciences

Abstract

Characteristics of relaxed density profile and conformation of polymer chains are studied by a Monte Carlo simulation on a discrete lattice in three dimensions using different segmental (kink-jump (K), crank-shaft (C), reptation (R)) dynamics. Three distinct density regimes, substrate, bulk, and interface, are identified. With the KC segmental dynamics, we find that the substrate coverage grows with a power law, d_s∝t^γ with a field (E) dependent non-universal exponent γ=0.23+0.7E. The bulk volume fraction d_b and the substrate polymer density (d_s) increases with the field with power-laws (d_b∝E^0.4, d_s∝E^0.2) in the low field regime. The interface polymer density d_f increases with the molecular weight. With the KCR segmental dynamics, bulk and substrate density decreases linearly with the temperature at high temperatures. The bulk volume fraction is found to decay with the molecular weight, d_b∝L_c^−0.11. The radius of gyration remains Gaussian in all density regions.

Comments

© 2002. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.

Publication Title

Journal of Molecular Structure: THEOCHEM

Volume

592

First Page

95

Last Page

103

Recommended Citation

Bentrem, F., Xie, J., Pandey, R. B. (2002). Density and Conformation with Relaxed Substrate, Bulk, and Interface in Electrophoretic Deposition of Polymer Chains. Journal of Molecular Structure: THEOCHEM, 592, 95-103.
Available at: https://aquila.usm.edu/fac_pubs/3496