Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 351266
Title Self-consistent-field analysis of the micellization of carboxy-modified poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) triblock copolymers
Author(s) Lauw, Y.; Leermakers, F.A.M.; Cohen Stuart, M.A.
Source The Journal of Physical Chemistry Part B: Condensed Matter, Materials, Surfaces, Interfaces & Biophysical 110 (2006)1. - ISSN 1520-6106 - p. 465 - 477.
DOI https://doi.org/10.1021/jp053795a
Department(s) Physical Chemistry and Colloid Science
VLAG
Publication type Refereed Article in a scientific journal
Publication year 2006
Keyword(s) peo block-copolymer - interacting chain molecules - aqueous-solutions - phase-behavior - aggregation behavior - statistical-theory - micellar structure - light-scattering - sodium-chloride - propylene-oxide
Abstract The micellization properties of carboxy-modified Pluronics P85 (poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) triblock copolymers) are investigated by means of a molecularly realistic self-consistent-field theory. We consider the, so-called, carboxylic acid end-standing P85 (CAE-85) case where the carboxylic group is located at the end of both PEO parts and the carboxylic acid center-standing P85 (CAC-85) case where each of the carboxylic group presents between the PEO and PPO blocks. The micellization of these copolymers depends on the pH, the added electrolyte concentration ¿s, and the temperature. It is shown that the aggregation number (Nagg) decreases, whereas the critical, micellization concentration (CMC) increases with pH. For the case of increasing ¿s, the Nagg increases and the CMC decreases. The critical micellization temperature (CMT) and cloud point temperature (CPT) increase with pH at low (¿s and decrease at increasing ¿ s. The changing from CAE-85 to CAC-85 leads to increasing CMC and CMT, but lower CPT
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