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Abstract
The influence of weight-average-molecular weight (M
w
) on the maximal thickness (h
) of the films of polystyrenes (PSs) and poly(methyl methacrylate)s (PMMAs) possessing the level of metal conductivity has been investigated. It has been shown that h
is directly proportional to M
for both PSs, and PMMAs. This behavior implies the value of h
is governed by the size of the random coil of these polymers. These results have been compared with those obtained earlier for other dielectric polymers, and discussed with respect to the influence of the nature of the solvent on the conductive properties of films of dielectric polymers.
Acknowledgment
The authors thank Dr. A. N. Ionov (A.F. Ioffe Institute, St. Petersburg) for providing interference microscope and Dr. E. P. Astapenko (Institute of Macromolecular Compounds, St. Petersburg) for the measurements of molecular weights of polyamidine by viscosimetry and diffusion method.