The Huggins coefficient as a means for characterizing suspended particles

Abstract

This theory determines the dependence of the Huggins coefficient k_H on the interaction potential between rigid spheres. Hard-sphere interactions represent a minimum, with k_H increasing for either attractive or longer-range repulsive potentials. Although derived for model potentials, the sticky sphere for short-range attractions and the excluded shell for repulsions, the results for k_H, when plotted against A₂N_A/M_w[η], should characterize other potentials as well. Furthermore, this interpretation should distinguish the effects of interaction potentials from those of anisotropy or permeability of the individual particles.