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2 results

  • 6 - Structure and Thermodynamics in Homogeneous Polyelectrolyte Solutions

  • Murugappan Muthukumar, University of Massachusetts, Amherst
  • Book:
    Physics of Charged Macromolecules
    Published online:
    16 February 2023
    Print publication:
    23 February 2023, pp 159-195

  • Summary

    The general premise of this chapter is to address thermodynamic behaviors and structure of charged macromolecules in non-dilute conditions, such as semidilute and concentrated solutions. After a summary of uncharged macromolecules in concentrated solutions, the coupling between the electrostatic and topological correlations is treated. Five regimes of polymer concentrations are outlined accompanied by a collection of experimental data. Spontaneous formation of large aggregates formed by similarly charged macromolecules is described in detail.

  • 8 - Self-Assembly and Phase Behaviors

  • Murugappan Muthukumar, University of Massachusetts, Amherst
  • Book:
    Physics of Charged Macromolecules
    Published online:
    16 February 2023
    Print publication:
    23 February 2023, pp 279-338

  • Summary

    Using the Flory-Huggins theory for uncharged polymer solutions, key concepts of the critical point, coexistence curve, and spinodal curve are presented. These concepts are then generalized to charged systems by explicitly considering restricted primitive model for electrolytes and new developments for polyelectrolyte solutions that include the liquid-liquid phase separation invoked in the formation of membrane-less organelles. Fibrillization in amyloids and collagen is discusses with a focus of electrostatic effects.