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SOLUBILIZATION OF P-ALKYLPHENOLS IN PLURONICS F-68 AND F-127 MICELLES: PARTITION COEFFICIENTS AND EFFECT OF SOLUTE ON THE AGGREGATE STRUCTURE

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dc.contributor.author OLEA, ANDRÉS F.
dc.contributor.author CARRASCO, HÉCTOR
dc.contributor.author ESPINOZA, LUIS
dc.contributor.author ACEVEDO, BETSABE
dc.date.accessioned 2016-07-04T15:29:23Z
dc.date.available 2016-07-04T15:29:23Z
dc.date.issued 2014-07
dc.identifier.citation J. Chil. Chem. Soc. vol.59 no.2 Concepción July 2014 es
dc.identifier.issn 0717-9707
dc.identifier.other http://dx.doi.org/10.4067/S0717-97072014000200011
dc.identifier.uri http://repositorio.unab.cl/xmlui/handle/ria/942
dc.description Indexación: Web of Science; Scielo. es
dc.description.abstract The partition of a series of substituted phenols between water and polymer micelles formed by Pluronic F-68 and F-127 has been studied. The formation of micelles by these block copolymers has been evidenced by steady-state fluorescence and dynamic light scattering. The data show that micelles and larger aggregates are formed above the critical micelle concentration. In presence of p-alkylphenols a micelle rearrangement occurs that leads to the formation of just one and large aggregate. This effect depends both on polymer and phenols structures. The partition coefficients and the standard free energies of transfer from the aqueous to the micellar phases were determined. The incremental free energy for a methylene group are 2.88 kJ mol-1 and 1.65 kJ mol-1 for F-127 and F-68, respectively. This difference is explained in terms of the core sizes that are determined by the length of the PPO block. es
dc.description.uri http://ref.scielo.org/xfqmx3
dc.language.iso en es
dc.publisher Sociedad Chilena de Química es
dc.subject Pluronic es
dc.subject Block copolymers es
dc.subject Polymer micelles es
dc.subject Partition es
dc.subject Free energy of transfer es
dc.subject Critical micelle concentration es
dc.subject Fluorescence probing methods es
dc.subject Dynamic light scattering es
dc.title SOLUBILIZATION OF P-ALKYLPHENOLS IN PLURONICS F-68 AND F-127 MICELLES: PARTITION COEFFICIENTS AND EFFECT OF SOLUTE ON THE AGGREGATE STRUCTURE es
dc.type Article es


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