The cooperative diffusion constant of a semidilute polymer solution with a good solvent is studied in the framework of a generalized Kirkwood-Riseman scheme with the aid of a renormalization-group approach. The result agrees well with the recent experimental results due to Wiltzius et al. and Nemoto et al. Why the hydrodynamic screening is unimportant is also discussed.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics