Spatially dependent relative diffusion of nanoparticles in polymer melts.

  title={Spatially dependent relative diffusion of nanoparticles in polymer melts.},
  author={Umi Yamamoto and Kenneth S. Schweizer},
  journal={The Journal of chemical physics},
  volume={139 6},
We formulate and apply a microscopic statistical-mechanical theory for the non-hydrodynamic relative diffusion coefficient of a pair of spherical nanoparticles in entangled polymer melts based on a combination of Brownian motion, mode-coupling, and polymer physics ideas. The focus is on the mesoscopic regime where particles are larger than the entanglement spacing. The dependence of the non-hydrodynamic friction on interparticle separation, degree of entanglement, and tube diameter is… CONTINUE READING

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