Abstract
Frictional coefficients for short-chain poly(ethylene oxide) have been determined by spin-echo n.m.r. measurements in chloroform, benzene and water. The results do not support an anomalous helical conformation in aqueous media but rather a common structure in all three solvents. Diffusion coefficients for PEO in dextran in NaPSS solutions have been determined. It is found that PEO transport is related to the macroscopic viscosity of the system, i.e. to both the concentration and molar mass of the matrix polymer.
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