Calculations of the dielectric constant of polymers from their chemical structure is an important problem both from the point of view of directed synthesis of polymers with the given dielectric constant and for estimation of the polarity (magnetic momentum) of the repeat unit of the polymer that is also of a significant meaning for predicting polymer solubility in organic solvents. That is why it is also worthwhile to perform quantitative estimation of the dielectric constant for organic liquids which are solvents for polymers. It must be noted immediately that the problem of calculation of the dielectric constant of organic liquids is more complicated than of polymers. This is associated with the circumstance that the coefficient of molecular packing for amorphous polymers is approximately identical and depends only slightly on the chemical structure of the polymer. As mentioned above, in the first approximation, the coefficient of molecular packing for glassy amorphous polymers at room temperature is estimated by the value 0.681. In more accurate approximation, the coefficient of molecular packing is approximately identical for all polymers at their glass transition temperatures T _g; this value is k _g = 0.667. As shown below, this enables accurate calculations of dielectric constant ? to be performed for polymers at room temperature.

For organic liquids, their coefficient of molecular packing significantly depends on the chemical structure; the coefficient of molecular packing for organic liquids varies in the range from 0.45 to 0.705. This circumstance makes it difficult to calculate the density...