Resumen

SPITZER, Marcos; SABADINI, Edvaldo  y  LOH, Watson. Poly(ethylene glycol) or Poly(ethylene oxide)?: Magnitude of end-group Contribution to the Partitioning of Ethylene Oxide Oligomers and Polymers between Water and Organic Phases. J. Braz. Chem. Soc. [online]. 2002, vol.13, n.1, pp. 7-9. ISSN 0103-5053.  http://dx.doi.org/10.1590/S0103-50532002000100002.

PEO partitioning from water to CH₂Cl₂ and CHCl₃ increases with its molar mass, leveling off at ca. 3 000 g mol^-1. Such a behaviour is related to PEO end-group contributions, suggesting a polyglycol to polyether transition at ca. 3 000 g mol^-1.

Palabras llave : poly(ethylene glycol); poly(ethylene oxide); polymer partitioning; polymer fractionation; biphasic systems; end-group contribution.