Acoustical and dynamic light scattering investigations of polymer porous films filled with a liquid crystal

摘要

We present results of investigation of the phase state and the dynamic properties of the composite material, which consists of polymer polyethylene terephthalate (PET) porous films filled with a liquid crystal 4-n-pentyl-4'-cyanobiphenyl (5CB). In the experiments, methods of acoustic spectroscopy and dynamic correlation spectroscopy were used. New information about dynamic and viscoelastic properties of a liquid crystal under strong confinement, in particular, for the region of the nematic-isotropic liquid (N-I) phase transition has been obtained. The dependences of the acoustic relaxation time on the temperature and the correlation time on the temperature and the pore radius are established and analyzed.