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RESEARCH PRODUCT
Dynamics of star polymers in a good solvent: A Kramers potential treatment
Harry L. FrischKaoru OhnoKurt BinderM. Schulzsubject
PhysicsQuantitative Biology::BiomoleculesMonte Carlo methodGeneral Physics and AstronomyThermodynamicsRadiusGyrationCondensed Matter::Soft Condensed MatterShear rateExcluded volumeDynamic Monte Carlo methodStatistical physicsPhysical and Theoretical ChemistryShear flowMonte Carlo molecular modelingdescription
The ‘‘effective’’ relaxation time τ of isolated star polymers with excluded volume interactions in the Rouse model limit (i.e., disregarding hydrodynamic interactions present in real solvents) is studied varying both the number of arms f and the number of monomers per arm l. Here τ is defined from the response of the gyration radius of the star polymer to a Kramers potential that describes the effect of shear flow in lowest order in the shear rate. Monte Carlo simulations are performed with two different techniques (simple sampling with enrichment or dynamic Monte Carlo, respectively) for two different models (simple self‐avoiding walks with an extended core or the bond fluctuation model, respectively). It is proposed that the ratio τ(f,l)/τ(1,l) should be a universal function of f for large l, and the Monte Carlo data are used to test this hypothesis.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1994-09-01 | The Journal of Chemical Physics |