Theory of light scattering by polymer solutions

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Abstract
The intermolecular contribution to light scattering by polymer solutions has been treated according to the smoothed Gaussian sphere model. Combining the results with the usual term for the individual molecule scattering we obtain for the reciprocal turbidity: The third virial term is also formulated. The angle dependent factor Q(θ) falls appreciably below unity at higher angles for large molecules in good solvents. Calculation of Q(θ) according to the theory is illustrated. Its replacement by unity may under some circumstances invite appreciable error.