FloryHugginsi
The Flory-Huggins theory is a statistical mechanical model used to describe the thermodynamics of polymer solutions and blends. Developed independently by Paul Flory and Maurice Huggins in the late 1930s, the theory provides a framework for understanding how polymers interact with solvents or other polymers. At its core, the Flory-Huggins theory introduces a key parameter, the Flory-Huggins interaction parameter, often denoted by the Greek letter chi ($\chi$). This parameter quantifies the excess Gibbs free energy of mixing per site, reflecting the difference in interaction energies between polymer segments and solvent molecules, or between different types of polymer segments in a blend.
The theory is based on several simplifying assumptions, including that the polymer and solvent molecules are
The Flory-Huggins theory has been instrumental in explaining phenomena such as polymer solubility, viscosity of polymer