✦ LIBER ✦
13C-NMR Evidence on Amphiphile Lifetime in Reverse (Water-in-Oil) Micelles Formed by a Poloxamer Block Copolymer
✍ Scribed by Paula C.A. Barreleiro; Paschalis Alexandridis
- Book ID
- 102581587
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 100 KB
- Volume
- 206
- Category
- Article
- ISSN
- 0021-9797
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✦ Synopsis
The dynamics of exchange between amphiphile assembled in reverse (water-in-oil) micelles and unimer (free in solution) amphiphile were probed by 13C-NMR spectroscopy in a ternary isothermal system consisting of a poly(ethylene oxide)-poly(propylene oxide) block copolymer (poloxamer), water, and xylene. An upper bound was obtained for the lifetime of a block copolymer molecule within the reverse micelle, using the theoretical treatment of exchange phenomena in NMR which is based on extensions of the Bloch equations. Copyright 1998 Academic Press.