A Light Scattering Study of the Association of Hydrophobically α- and α,ω-End-capped Poly(ethylene oxide) in Water
✍ Scribed by C. Gourier; E. Beaudoin; M. Duval; D. Sarazin; S. Maı̂tre; J. François
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 150 KB
- Volume
- 230
- Category
- Article
- ISSN
- 0021-9797
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✦ Synopsis
Several hydrophobically αand α,ω-end-capped poly(ethylene oxide) polymers were studied by light scattering below and above their critical association concentration, in order to understand their association mechanisms. In the case of monofunctionalized PEO, a one-step closed association model well fits the experimental data, with a limit number of aggregation of about 30, consistent with other experimental data and a theoretical approach. In the case of difunctionalized PEO, a good description of the experimental data is obtained by assuming a two-step association process: at low concentration, the formation of "flower-like" micelles is well described by a closed association model, whereas at higher concentration, the progressive bridging of these "flowers" can be modeled by an open association.