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Applicability of Weimer‐Cooper’s distribution model for ethoxylated products
Author(s) -
Sallay Peter,
Farkas Laszlo,
Rusznak Istvan
Publication year - 1990
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02540644
Subject(s) - chemistry , weibull distribution , distribution (mathematics) , thermodynamics , computational chemistry , physics , mathematics , statistics , mathematical analysis
Abstract The Natta‐Mantica distribution constants characterizing the molecular mass distribution of ethoxylated product mixtures, discussed in an earlier paper, cannot be considered real constants because their values depend on the average degree of ethoxylation (Weibull‐Törnquist effect). As the average degree of ethoxylation is included in the starting equation of the Weimer‐Cooper’s model, it was applied in an attempt to characterize the molecular mass distribution of an ethoxylated fatty alcohol. However, only a qualitative approximation of the distribution was possible with the Weimer‐Cooper’s constants. Consequently, the constants had to be calculated separately from measured mass distribution data. It was demonstrated that the two models predict the same constants when they are in modified form.