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Resolution of a nonionic surfactant oligomeric mixture by means of DOSY with inverse micelle assistance by Fioretta Asaro; Nina Savko is a Chemistry article available to read on EtoBox.

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## Abstract DOSY is a recognized, efficient technique in the analysis of mixtures. It relies on the differences in self‐diffusion coefficients, which are determined by the molecular size. Nowadays, efforts are directed towards devising matrices able to interact with the components of the mixture with differential affinity, and therefore capable to interfere with the diffusion processes and to display resolving power towards species of close, or even equal molecular weight, like isomers. Usually, commercial nonionic surfactants are mixtures of oligomeric species, since the head group, which is a short polyoxyehtylene chain, is somewhat polydisperse. The embedment of Igepal CA‐520, 5 polyoxyethylene iso‐octylphenyl ether, in an inverse microemulsion led to the separation of ^1^H signals of the various oligomeric components. This ensued from the differential partitioning between the oil and the surface of the inverse micelles, which depends on the ethyleneoxide number (EON) of the head groups. Thus, it was possible to ascertain that the length distribution of the polyethyleneoxide chains is ingood agreement with the Poisson distribution theoretically predicted for the polymerization o

Who reads Resolution of a nonionic surfactant oligomeric mixture by means of DOSY with inverse micelle assistance?

Author

Fioretta Asaro; Nina Savko

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; John Wiley and Sons Ltd; Wiley (ISSN 0749-1581)

Published

2011

Language

EN

Field

Chemistry (Physical Sciences)