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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/3950

Title: NONEQUILIBRIUM PROCESSES IN POLYMERS UNDERGOING INTERCHANGE REACTIONS .2. REACTION-DIFFUSION PROCESSES
Authors: POJMAN, JA
GARCIA, AL
KONDEPUDI, DK
VAN DEN BROECK, Christian
Issue Date: 1991
Publisher: AMER CHEMICAL SOC
Citation: JOURNAL OF PHYSICAL CHEMISTRY, 95(14). p. 5655-5660
Abstract: A reaction-diffusion system of polymers undergoing interchange reactions is studied. The equation that describes the dynamics of the system is similar to the Boltzmann equation for a gas of hard spheres. We consider a one-dimensional system in which the average length and the concentrations at the boundaries are fixed. The resulting steady states are obtained analytically and with numerical integration of equations obtained by using a local equilibrium approximation. Monte Carlo simulations of experimentally realizable conditions were performed and compared. The results reveal a nonlinear distribution of molecular concentration and mass. The entropy of the polymer distributions is calculated as function of position and shown to be less than the entropy for the distributions without interchange reactions. The diffusion of a square pulse is also considered.
Notes: SAN JOSE STATE UNIV,DEPT PHYS,SAN JOSE,CA 95192. WAKE FOREST UNIV,DEPT CHEM,WINSTON SALEM,NC 27109. LIMBURGS UNIV CENTRUM,B-3610 DIEPENBEEK,BELGIUM.POJMAN, JA, UNIV SO MISSISSIPPI,DEPT CHEM & BIOCHEM,SO STN,BOX 5043,HATTIESBURG,MS 39406.
URI: http://hdl.handle.net/1942/3950
ISI #: A1991FW47700051
ISSN: 0022-3654
Type: Journal Contribution
Appears in Collections: Research publications

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