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Refractive Index Increments of Polymers in Solution: 2. Refractive Index Increments and Light-Scattering in Polydisperse Systems of Low Molecular Weight,
UNIVERSITY OF WESTERN ONTARIO LONDON DEPT OF CHEMISTRY
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Theoretical equations are deduced which predict that the specific refractive index of a polymer in solution is vvinfinityv0Mn, where Mn is the number average molecular weight, and vinfinityand v0 depend on the refractive index, n1, of the solvent, on the specific refractivity of the pure polymer, and on the specific volume of the polymer in solution. Mixtures of two polymers whose refractive increments depend on molecular weight are also considered. Methods of distinguishing the effects of polydispersity of composition from effects due to the dependence of the average v on the average molecular weight are discussed for mixtures of components whose individual properties are unknown. Author
APPROVED FOR PUBLIC RELEASE