Tube width fluctuations of entangled stiff polymers

Details Tube width fluctuations of entangled stiff polymers Tube width fluctuations of entangled stiff polymers

2010-11-27

arxiv.org/abs/1011.5980v2

Phys. Rev. E 84 (2011), 051801

Physics

Condensed Matter

Soft Condensed Matter

Major revision (8 pages, 5 figures)

Scientific paper

10.1103/PhysRevE.84.051801

The tube-like cages of stiff polymers in entangled solutions have been shown to exhibit characteristic spatial heterogeneities. We explain these observations by a systematic theory generalizing previous work by D. Morse (Phys. Rev. E 63:031502, 2001). With a local version of the binary collision approximation (BCA), the distribution of confinement strengths is calculated, and the magnitude and the distribution function of tube radius fluctuations are predicted. Our main result is a unique scaling function for the tube radius distribution, in good agreement with experimental and simulation data.

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