Kinetics of collapse transition and cluster formation in a thermoresponsive micellar solution of P(S-b-NIPAM-b-S) induced by a temperature jump
- Structural changes at the intra- as well as intermicellar level were induced by the LCST-type collapse transition of poly(N-isopropyl acrylamide) in ABA triblock copolymer micelles in water. The distinct process kinetics was followed in situ and in real-time using time-resolved small-angle neutron scattering (SANS), while a micellar solution of a triblock copolymer, consisting of two short deuterated polystyrene endblocks and a long thermoresponsive poly(N-isopropyl acrylamide) middle block, was heated rapidly above its cloud point. A very fast collapse together with a multistep aggregation behavior is observed. The findings of the transition occurring at several size and time levels may have implications for the design and application of such thermoresponsive self-assembled systems.
| Verfasserangaben: | Joseph Adelsberger, Ezzeldin Metwalli, Alexander Diethert, Isabelle Grillo, Achille Mayelle Bivigou Koumba, André LaschewskyORCiDGND, Peter Müller-Buschbaum, Christine M. PapadakisORCiDGND |
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| DOI: | https://doi.org/10.1002/marc.201100631 |
| ISSN: | 1022-1336 |
| Titel des übergeordneten Werks (Englisch): | Macromolecular rapid communications |
| Verlag: | Wiley-Blackwell |
| Verlagsort: | Malden |
| Publikationstyp: | Wissenschaftlicher Artikel |
| Sprache: | Englisch |
| Jahr der Erstveröffentlichung: | 2012 |
| Erscheinungsjahr: | 2012 |
| Datum der Freischaltung: | 26.03.2017 |
| Freies Schlagwort / Tag: | polymer physics; small-angle neutron scattering; thermoresponsive polymers; time-resolved measurements |
| Band: | 33 |
| Ausgabe: | 3 |
| Seitenanzahl: | 6 |
| Erste Seite: | 254 |
| Letzte Seite: | 259 |
| Fördernde Institution: | DFG [SPP1259, Pa771/4, Mu1487/8, La611/7] |
| Organisationseinheiten: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie |
| Peer Review: | Referiert |
