DYNAMICS OF POLYMER NETWORKS OF ION EXCHANGERS STUDIED BY MOSSBAUER SPECTROSCOPY, RAYLEIGH SCATTERING OF MOSSBAUER RADIATION, AND LOW-ENERGY NEUTRON SCATTERING

摘要

We have investigated the dynamics of polymer networks of ion exchangers in dry (typically solid-state) and hydrated (highly mobile) states. We have determined parameters of their motion: the displacements for Fe (up to 0.15 A~2) and H (up to 0.5 A~2) and the coefficients of limited diffusion for the network fragments (10~(-10)-10~(-6) cm~2·S~(-1)). We established that the intensities of the fast motions of various networks, measured by low-energy neutron scattering, are similar, while the difference in the parameters of slower motions, observed by Mossbauer spectroscopy, amounts to more than two orders of magnitude. Thus the semi-liquid state of the network was observed with a probability of Mossbauer effect f' = 0(+2·10~(-4)).