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Arrested swelling of highly entangled polymer globules

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons48276

Lee,  N. K.
MPI for Polymer Research, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons47555

Abrams,  C. F.
MPI for Polymer Research, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons48114

Johner,  A.
MPI for Polymer Research, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons48522

Obukhov,  S.
MPI for Polymer Research, Max Planck Society;

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Zitation

Lee, N. K., Abrams, C. F., Johner, A., & Obukhov, S. (2003). Arrested swelling of highly entangled polymer globules. Physical Review Letters, 90(22): 225504.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000F-61DB-5
Zusammenfassung
Upon aging, a collapsed long chain evolves from a crumpled state to a self-entangled globule which can be thought of as a large knot. Swelling of an equilibrium globule in good solvent is a two-step process: (i) fast swelling into an arrested stretched structure with conserved entanglement topology followed by (ii) slow disentanglement. Using computer simulation, we found both mass-mass (m-m) and entanglement-entanglement (e-e) power law correlations inside the swollen globule. The m-m correlations are characterized by a set of two exponents in agreement with a Flory-type argument. The e-e correlations are also characterized by two exponents, both of them larger (by ~0.3) than the related m-m exponents. We interpret this difference as evidence of distance-dependent repulsion E=-0.3ln(ρ)kBT between entanglements sliding along the polymer chain.