6533b860fe1ef96bd12c2e6b
RESEARCH PRODUCT
A Monte Carlo study of diffusion in "living polymers"
Andrey MilchevY. Rouaultsubject
chemistry.chemical_classificationQuantitative Biology::BiomoleculesMaterials scienceMonte Carlo methodGeneral Physics and AstronomyThermodynamicsPolymerExponential functionCondensed Matter::Soft Condensed Matterchemistry.chemical_compoundMonomerchemistryMolar mass distributionStatistical physicsDiffusion (business)Bond energyConstant (mathematics)description
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 D ∝ 1/L, where L is the average chain length of the polydisperse system. We also find a D ∝ exp [ − V/2kBT] dependence on the bond energy V, whereas at constant temperature the diffusion coefficient turns out to be inversely proportional, D ∝ ρ−1, to the monomer density of the system ρ in agreement with mean-field description of living polymers.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1996-02-10 | Europhysics Letters (EPL) |