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Article Dans Une Revue Physical Review Letters Année : 2003

Arrested swelling of highly entangled polymer globules

Résumé

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.
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Dates et versions

hal-00188991 , version 1 (02-04-2024)

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Nam-Kyung Lee, Cameron Abrams, Albert Johner, Sergeï Obukhov. Arrested swelling of highly entangled polymer globules. Physical Review Letters, 2003, 90 (22), pp.225504. ⟨10.1103/PhysRevLett.90.225504⟩. ⟨hal-00188991⟩
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