Dielectric Relaxation of Type-A Rouse Chains Undergoing Reversible End-Adsorption and Desorption

抄録

Theoretical analysis was made for dielectric relaxation of model chains, linear Rouse chains having type-A dipoles and being end-adsorbed (tethered) and desorbed at equilibrium, with an attempt to find a clue for investigation of the adsorbed chain dynamics in polymer nanocomposites. Expanding the bond vector of those chains with respect to the Rouse eigenfunctions, we obtained analytical expressions of the normalized complex dielectric permittivity and the first-moment average relaxation time of those chains. The adsorbed and desorbed chains, respectively, were found to exhibit retarded and accelerated relaxation due to motional coupling activated by their mutual conformation transfer.