Expanded chains Flory radius

The described distribution function refers to the asymptotic limit of large degrees of polymerization. It is important to note that, as for ideal chains, p R) includes one parameter only, now the quantity called in the literature Flory-radius . Rp is a measure for the diameter of the volume occupied by the expanded polymer chain, with the identical definition as for ideal chains... 

Considering these results, we can now see how the change from the expanded chains in dilute solutions to the ideal chains in a melt is accomplished With increasing concentration the screening length decreases continuously, and if it comes down to the thermic correlation length excluded volume effects disappear. Simultaneously the chain size shrinks, from the Flory radius Rp in the dilute solution down to the radius Rq of the Gaussian chains in the melt. 

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