1 Answers
The Huggins Equation is an empirical equation used to relate the reduced viscosity of a dilute polymer solution to the concentration of the polymer in solution. It is named after Maurice L. Huggins. The Huggins equation states:
η s c = + k H 2 c {\displaystyle {\frac {\eta _{s}}{c}}=+k_{H}^{2}c}
Where η s {\displaystyle {\eta _{s}}} is the specific viscosity of a solution at a given concentration of a polymer in solution, {\displaystyle } is the intrinsic viscosity of the solution, k H {\displaystyle k_{H}} is the Huggins coefficient, and c {\displaystyle c} is the concentration of the polymer in solution. In isolation, n s {\displaystyle n_{s}} is the specific viscosity ofa solution at a given concentration.
The Huggins equation is valid when c {\displaystyle c} is much smaller than 1, indicating that it is a dilute solution. The Huggins coefficient used in this equation is an indicator of the strength of a solvent. The coefficient typically ranges from about 0.3 {\displaystyle 0.3} to 0.5 {\displaystyle 0.5} .