  Results of broadband dielectric spectroscopy and rheological studies of
poly(propylene glycol) + SiO${_2}$ nanocomposites are presented. They show that
the dynamics in high-concentrated composite is determined by confinement and
adsorption effects, resulting from interactions of confined polymers correspond
with the host system at the interface between PPG and solid nanoparticles. The
evolution of relaxation times follows the clear Vogel-Fulcher-Tammann pattern,
what is proved by the supplementary activation energy temperature index
analysis. The strong influence of nanoparticles on the transitional dynamics
and the fragility in the ultraviscous domain was noted.
