Abstract
In 1940, Flory deducted that the molecular distribution of ethylene oxide polymers, obtained by reaction of ethylene oxide with ethylene glycol, is represented by Poisson's distribution law. This mathematical equation was subsequently used by other authors for calculating the fractions molars of the products of the reaction of ethylene oxide with alcohols and phenols, without taking into account to be used as quantity of units of ethylene oxide to x instead of x − 1. In this article, it is theoretically demonstrated that if the equation obtained by Flory is modified in this way, it gets that the hydrophilic-lipophilic balance of non ionic polioxiethylenated surfactants can be calculated from the mean number of molecules of ethylene oxide that reacts with one molecule of alcohol or phenol.
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