MOLECULAR MOTIONS IN POLY (VINYL-ACETATE) AND IN POLY(VINYL ACETATE) P-NITROANILINE MIXTURES

In the present paper we examine the dielectric properties of solid sol utions of p-nitroaniline in a poly(vinyl acetate) matrix in the freque ncy range from 16 to 10(5) Hz and the results are compared with those for pure poly(vinyl acetate). It is shown that the presence of the sol ute increases the activation energy of the alpha relaxation process of the polymer and broadens the distribution of relaxation times for thi s process. It is suggested that these observations can be interpreted in terms of the formation of hydrogen bonds between the solute and the side groups of the polymer.