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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.

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Metadaten
Author:Joseph Adelsberger, Ezzeldin Metwalli, Alexander Diethert, Isabelle Grillo, Achille M. Bivigou-Koumba, André LaschewskyORCiDGND, Peter Müller-Buschbaum, Christine M. Papadakis
DOI:https://doi.org/10.1002/marc.201100631
ISSN:1022-1336 (print)
Parent Title (English):Macromolecular rapid communications
Publisher:Wiley-Blackwell
Place of publication:Malden
Document Type:Article
Language:English
Year of first Publication:2012
Year of Completion:2012
Release Date:2017/03/26
Tag:polymer physics; small-angle neutron scattering; thermoresponsive polymers; time-resolved measurements
Volume:33
Issue:3
Pagenumber:6
First Page:254
Last Page:259
Funder:DFG [SPP1259, Pa771/4, Mu1487/8, La611/7]
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie
Peer Review:Referiert