Gladstone-Dale rule

Scattering intensities of sufficient magnitude are only observed when the absolute values of the refractive index increments Y = dnjdc are more than 0.05 cm g. To a rough approximation, refractive index increments increase linearly with the refractive index of the solvent, the slope being given by the partial specific volume vi of the solute according to the Gladstone-Dale rule... [Pg.327]

Values of dn/dc have a nearly linear dependence on solvent refractive index, so that if values are not available in the solvent to be used it can also be determined by extrapolation from other solvent systems. If the polymer refractive index and the partial specific volume of the polymer in the solvent Vp are known, then dn/dc can be estimated by the Gladstone-Dale rule (2),... [Pg.114]

This equation, which holds to a good approximation, represents nothing but the rule of Gladstone and Dale additively applied to the mixture For its verification the densities and the refractive indices of the components and those of the... [Pg.576]

According to the well known rule of Gladstone and Dale (cf. p. 576), variations in density within these series could be accounted for by the equations... [Pg.591]

Fig. 65 shows the course of the values of n,)q and ni)q in dependence on the water content a of the fibre, as found experimentally (dots), as calculated according to the additive rule of Gladstone and Dale (fully drawn lines), and as calculated according to equation (45) combined with equation (47)... [Pg.597]

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