Systems which obey the Flory‐Scott equation are discussed, and it is shown that the molecular‐weight distribution of increasingly small fractions taken from a polymer solution of the same initial concentration becomes constant. Means of calculating this limiting distribution of an incipient fraction are presented, and it is shown that, in a practical sense, all fractions smaller than the order of one‐sixth the polymer present have nearly the same distribution. To obtain sharp fractions it is more efficacious to take a small number of cuts per stage and refractionate a number of times.
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Edward V. Sayre (1953) studied this question.
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