21. However, if the polyelectrolyte is too heavy it will not dissolve in the solution. 22. As we increase the macroion separation, we simultaneously stretch the polyelectrolyte chain adsorbed to them. 23. When macromolecules, such as polyelectrolytes attach to surfaces, one rather calls this process adsorption. 24. Under the right conditions, oppositely charged polyelectrolyte chains can assemble into flexible, fluid complexes. 25. A'strong'polyelectrolyte is one which dissociates completely in solution for most reasonable pH values. 26. Polyelectrolytes which bear both cationic and anionic repeat groups are called "'polyampholytes " '.27. Polyelectrolytes have many applications, mostly related to modifying flow and stability properties of aqueous solutions and gels.28. It is water-soluble, forms gels when cross linked, and acts as a cationic polyelectrolyte . 29. At equilibrium, the relationship between these polyelectrolyte layers and a fluid bulk is called the Donnan equilibrium. 30. The three main research axes concern : polyelectrolytes , polymers at the interfaces and self-assembly systems.
