Kinetics of sorption processes in polymer gels

摘要: Kinetic features of sorption process in polymers gels with complicated supermolecular structure have been analyzed. The mechanism parallel diffusion was suggested to describe transfer processes which consist several partial ones carried out simultaneously different elements. Each region is characterized by own coefficient. In this case, apparent coefficient the as a whole function time D(t). averages and ultimate concentration sorbate can be obtained, using initial rate extrapolation D(t)t=0. These values depend on averaging type allow relate kinetics departures from Fick’s law because heterogeneity polymer or other reasons (e.g., relaxation retardation diffusion). experimental data were treated framework model. As result, it shown that approach convenient determine heterogeneous structures.