A Monte Carlo study of diffusion in "living polymers"
Johannes-Gutenberg-Universität, Institut für Physik,
Staudinger Weg 7, 55099
2 Institute for Physical Chemistry, Bulgarian Academy of Sciences, 1040 Sofia, Bulgaria
Accepted: 21 December 1995
We report the first numeric experiments on diffusion in living polymers (polymers that can break and recombine reversibly, and are characterized by an exponential molecular weight distribution). In the simulation we use a modification of the bond fluctuation model which is known to reproduce the correct Rouse dynamics of polymer chains. The diffusion coefficient D reveals a Rouse-type behaviour , where L is the average chain length of the polydisperse system. We also find a dependence on the bond energy V , whereas at constant temperature the diffusion coefficient turns out to be inversely proportional, , to the monomer density of the system ρ in agreement with mean-field description of living polymers.
PACS: 05.40.+j – Fluctuation phenomena, random processes, and Brownian motion / 36.20.-r – Macromolecules and polymer molecules / 82.35.+t – Polymer reactions and polymerization
© EDP Sciences, 1996