Correlations microstructure-dielectric properties in thin films of high molecular weight atactic polystyrene
Novikov D.V.1
1Kirov State Forest Technical University, St. Petersburg, Russia
Email: dvnovikov65@mail.ru
The density microfluctuations δrho on the surface of thin films obtained from solutions of various concentrations c of high molecular weight atactic polystyrene in chloroform have been studied by electron microscopy. It is shown that the value of δrho and the dielectric properties of films - the dielectric permittivity ε, as well as the dielectric loss angle tangent tgΔ change nonmonotonously on the scale of parameter c. The minimum ε and maximum tgΔ correspond to a sharp surge in microfluctuations and fractalization of the supermolecular structure of the polymer. The discovered correlations of the "microstructure-properties" type are explained by structural transitions during film formation - aggregation of macromolecules and self-organization of particle aggregates. Keywords: thin polymer films, electron microscopy, density microfluctuations, fractal structure, structural transitions.
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