Abstract
AbstractAn outline of thermodynamic and hydrodynamic properties of polyelectrolytes in solution is given. It is pointed out that proper models should be adopted to explain those properties. A polyion is often assumed to be a rigid rod having smeared charges on its surface for analyzing thermodynamic properties. The electrostatic potential distribution around rod‐like polyions, which may be calculated from the Poisson‐Boltzmann equation, can be tested by comparison with potentiometric titration data of poly(weak acids). Features of the counterion‐binding concept in analyzing thermodynamic properties are explained.It is pointed out that the radius of gyration is important for analyzing hydrodynamic properties. Features of sedimentation, diffusion, and electrophoresis are explained and compared with each other. Discussion on the expansion factor of the polyion in the presence of added salt is also given in comparison with the theories published. Finally, a characteristic polymer concentration dependence of reduced viscosity, diffusion coefficient, and osmotic pressure coefficient of polyelectrolytes in pure aqueous solutions is explained.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call