Viscometric, light‐scattering, and osmotic pressure measurements were carried out on poly(n‐butyl methacrylate) fractions in methyl ethyl ketone and acetone. Relationships between the limiting viscosity number, the average molecular weight, and the mean dimensions were obtained. Heterogeneity corrections were applied to all relationships, assuming a Schulz‐type distribution. Values of Φ, calculated according to the Flory‐Fox equation, were found to be 2.3 × 1023 and 2.1 × 1023 in MEK and acetone, respectively. No significant trend with molecular weight was noticed in the range investigated, though the dependence of [η] on the mean radii of gyration is less than that predicted by the Flory theory.
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Leemput et al. (1963) studied this question.
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