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V. V. KLEPKO, Yu. M. NIZEL’S’KY, N. V. MNIKH, V. I. SLISENKO, and O. A. VASYL’KEVYCH
«Dynamics of Low Molecular Probes in Nanostructured Polyurethane Networks Containing Co(acac)3»
949–964 (2008)

PACS numbers: 61.05.fg, 61.41.+e, 63.22.Kn, 66.30.hk, 76.30.-v, 78.70.Nx, 82.35.-x

Dynamics of low-molecular probes in the nanostructured polyurethane networks containing coordination cobalt compounds immobilized in situ is analyzed using quasi-elastic thermal-neutrons scattering and EPR with paramagnetic probes of various nature. The peculiarities of the complex formation of Co(асас)3 in polymer matrix are characterized due to analysis of electron-spin parameters of the complex paramagnetic probe introduced into polyurethane matrix. As shown, the complex formation of metal-containing modifier with macrochains results in appearance of additional spatial obstacles for probe-molecules diffusion as compared with metal free network. Difference of the probe dynamics in Co-containing polyurethanes obtained using different solvents (DMFA or СН2Сl2) points on structural morphology sensitivity to presence of additional complexing agent in reaction mixture.