Table of Contents
Journal of Polymers
Volume 2013 (2013), Article ID 768653, 7 pages
http://dx.doi.org/10.1155/2013/768653
Research Article

Rheological Properties and Reverse Micelles Conditions of PEO-PPO-PEO Pluronic F68: Effects of Temperature and Solvent Mixtures

1Laboratoire de Physique de la Matière Molle et de la Modélisation Electromagnétique, Faculté des Sciences de Tunis, Université El Manar, Campus Universitaire, 2092 Tunis, Tunisia
2Institut National des Sciences Appliquées et de Technologie, INSAT, Centre Urbain Nord, BP 676, 1082 Tunis, Tunisia

Received 23 June 2013; Revised 28 August 2013; Accepted 4 September 2013

Academic Editor: Dirk Kuckling

Copyright © 2013 Mouna Ben Henda et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The rheological properties of Pluronic F68 were dissolved in various water/organic liquid mixtures over a wide range of temperatures, all at a concentration of 20 mg/mL. We have considered the following binary mixtures: Pluronic F68/water, F68/p-xylene, and F68/phenol. Various conformational transitions were detected and interpreted. We have also shown that these mixtures retain a Newtonian behavior independently of temperature and conformational changes. For ternary F68/p-xylene/water, F68/phenol/water, and F68/water/phenol mixtures, the behaviour of the solution is intimately related to the temperature and the amount of water and organic solvent added.