Nur -E- Alam The diffusion coefficient of PEG 6000 in water at 25°C is about 1.2×10−10m2/s, and the diffusion coefficient of PVP K30 (with a molecular weight of about 40,000) in water at 25°C is about 0.8×10−10m2/s. These values are based on dynamic light scattering measurements.
Patel, R. P., Patel, D. J., Bhimani, D. B., & Patel, J. K. (2008). Physicochemical characterization and dissolution study of solid dispersions of furosemide with polyethylene glycol 6000 and polyvinylpyrrolidone K30. Dissolution Technol, 15(3), 17-25.