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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.
| Author details: | 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 |
| Title of parent work (English): | Macromolecular rapid communications |
| Publisher: | Wiley-Blackwell |
| Place of publishing: | Malden |
| Publication type: | Article |
| Language: | English |
| Year of first publication: | 2012 |
| Publication year: | 2012 |
| Release date: | 2017/03/26 |
| Tag: | polymer physics; small-angle neutron scattering; thermoresponsive polymers; time-resolved measurements |
| Volume: | 33 |
| Issue: | 3 |
| Number of pages: | 6 |
| First page: | 254 |
| Last Page: | 259 |
| Funding institution: | DFG [SPP1259, Pa771/4, Mu1487/8, La611/7] |
| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie |
| Peer review: | Referiert |
