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Photophysical evaluation of synergism from critical micelle temperature of mixed triblock polymer micelles

Paper ID Volume ID Publish Year Pages File Format Full-Text
28370 44071 2007 8 PDF Available
Title
Photophysical evaluation of synergism from critical micelle temperature of mixed triblock polymer micelles
Abstract

The critical micelle temperatures (cmt) of binary mixtures of triblock polymer (TBP) of poly(ethylene oxide) block poly(propylene oxide) block poly(ethylene oxide) (L64, P103, P84, P104) with different PPO/PEO ratios were determined employing the fluorescence measurements. The photophysical properties of pyrene due to its quenching as well as excimer formation in the interior of the mixed TBP micelles were studied and explained on the basis of stability of the mixed micelles. It was observed that the mixed micelle formation between the unlike components of P103 + L64 and P103 + P84 mixtures formed due to the attractive interactions and which raised from the mutual compatible arrangement among the unlike TBP monomers in the mixed state so as to minimize the steric hindrances. The results were fully supported by the viscosity measurements.

Keywords
Triblock polymers; Critical micelle temperature; Mixed micelles; Fluorescence measurements
First Page Preview
Photophysical evaluation of synergism from critical micelle temperature of mixed triblock polymer micelles
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 186, Issues 2–3, 25 February 2007, Pages 349–356
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering