Author/Authors :
Nikonorova، نويسنده , , N.A. and Balakina، نويسنده , , M.Yu. and Fominykh، نويسنده , , O.D. and Pudovkin، نويسنده , , M.S. and Vakhonina، نويسنده , , T.A. and Diaz-Calleja، نويسنده , , R. and Yakimansky، نويسنده , , A.V.، نويسنده ,
Abstract :
Dielectric behavior of two epoxy-based oligomers with covalently attached 4-amino-4′-nitroazobenzene NLO chromophore fragments is studied. Four processes of relaxation of dipole polarization, γ-, β-, β1-, and α-processes are identified by the method of dielectric spectroscopy. Monte-Carlo conformational analysis and molecular dynamics of dimeric chain fragments of these polymers is performed and mobilities of specific chain fragments are estimated. Molecular mechanisms for the γ-, β-, and β1-processes, occurring in the glassy state, are suggested on the basis of a comparison of the dielectric spectroscopy and molecular modeling data.
