The effect of composition and structure on dielectric characteristics of films based on poly(vinyl alcohol) cyano ether

The composition, bulk structure, and supramolecular structure of poly(vinyl alcohol) cyano ether are studied by the methods of IR and high-resolution NMR spectroscopy and by atomic force microscopy. According to the data on the parameter of blockiness (η = 1.03), this copolymer is characterized by a random structure; the content of residual acetate groups is below the detection level of the applied methods. When the films are formed by screen printing, owing to the high orientation of polymer in the direction perpendicular to the direction of the supporting plane, the dielectric permeability of the films is higher than that of the films prepared by film casting. Films with a thickness of 20–40 μm are prepared, and their dielectric permeability approaches 23.