| Autor: |
Ternat, C., Kreutzer, G., Plummer, C. J.G., Nguyen, T. Q., Herrmann, A., Ouali, L., Sommer, H., Fieber, W., Velazco, M. I., Klok, H.-A., Månson, J.-A. E. |
| Předmět: |
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| Popis: |
Novel amphiphilic multi-arm star-block copolymers with a hyperbranched core, a hydrophobic inner shell, and a hydrophilic outer shell have been prepared from a commercial hyperbranched polyester macroinitiator by ring-opening polymerization of -caprolactone, followed by atom transfer radical polymerization of tert-butyl acrylate (tBuA). Hydrolysis of the tert-butyl groups was then used to convert the poly(tBuA) blocks to poly(acrylic acid), resulting in stable amphiphilic core-shell structures with significantly higher degrees of functionality than reported so far in the literature. A strong correlation between the maximum concentration of selected hydrophobic guest molecules and the concentration of amphiphilic star-block copolymer in aqueous solution was observed by 1H NMR, demonstrating the capacity of these copolymers to encapsulate and disperse significant loadings (up to about 27 wt.-%) of volatile hydrophobic molecules such as fragrances in water. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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