The dielectric properties of Langmuir-Blodgett films of 20 and 30 monolayers (100-150 A thick) of a 70/30 polyvinylidene fluoride-trifluoroethylene copolymer were studied. Several peculiarities in the behavior of $ε',ε''$ nontypical of bulk samples of the same composition were observed. Jn particular, in the surface phase transition region at 20$^о$C, as the frequency increased from 80 Hz to 20 kHz, a pronounced shift of the $ε'$ maximum to the lower temperatures was observed. In the frequency dependence of $ε''$, a smeared maximum at 300-500 Hz likely to be caused by macroformations was observed.
Department of Physics of Polymers and Crystals, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia
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