SPECTRUM OF LIGHT SCATTERED FROM POLYDISPERSE POLYMER-SOLUTIONS

The authors examine several methods for analyzing the spectrum of light scattered from polydisperse polymer solutions. General expressions are reviewed for the inelastic scattering spectra and integrated intensities due to the pure translational normal mode of motion, using both heterodyne and homodyne detection, in terms of the molecular weights, concentrations, scattering form factors, and diffusion coefficients of the individual polymeric species. These results are used to obtain general expressions for the limiting slopes and intercepts of various rearranged versions of the equation that permit linear plotting. Numerical calculations for two particular cases indicate the relative merits of the various data analysis procedures.