Home > Publications database > The collapse transition and the segmental dynamics in concentrated micellar solutions of P(S-b-NIPAM) diblock copolymers > print

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024 7 _ |2 DOI
|a 10.1007/s00396-011-2382-3
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|a WOS:000289576300024
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|a 0303-402X
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|a AdelsbergerMBBHHLMP2010
037 _ _ |a PreJuSER-15283
041 _ _ |a eng
082 _ _ |a 540
084 _ _ |2 WoS
|a Chemistry, Physical
084 _ _ |2 WoS
|a Polymer Science
100 1 _ |0 P:(DE-HGF)0
|a Adelsberger, J.
|b 0
245 _ _ |a The collapse transition and the segmental dynamics in concentrated micellar solutions of P(S-b-NIPAM) diblock copolymers
260 _ _ |a Berlin
|b Springer
|c 2011
336 7 _ |a Journal Article
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336 7 _ |a article
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440 _ 0 |0 1358
|a Colloid and Polymer Science
|v 289
|x 0303-402x
|y 5
500 _ _ |a We kindly acknowledge the given beam time by the Julich Centre for Neutron Science at FRM II. This work was supported by the DFG priority program SPP1259 "Intelligente Hydrogele" (Pa771/4, Mu1487/8, La611/7, He2995/2). A.M. Bivigou-Koumba gratefully acknowledges a personal grant from Deutscher Akademischer Austauschdienst (DAAD).
520 _ _ |a We investigate concentrated solutions of poly(styrene-b-N-isopropyl acrylamide) (P(S-b-NIPAM)) diblock copolymers in deuterated water (D2O). Both structural changes and the changes of the segmental dynamics occurring upon heating through the lower critical solution temperature (LCST) of PNIPAM are studied using small-angle neutron scattering and neutron spin-echo spectroscopy. The collapse of the micellar shell and the cluster formation of collapsed micelles at the LCST as well as an increase of the segmental diffusion coefficient after crossing the LCST are detected. Comparing to our recent results on a triblock copolymer P(S-b-NIPAM-b-S) [25], we observe that the collapse transition of P(S-b-NIPAM) is more complex and that the PNIPAM segmental dynamics are faster than in P(S-b-NIPAM-b-S).
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653 2 0 |2 Author
|a Block copolymers
653 2 0 |2 Author
|a Responsive polymers
653 2 0 |2 Author
|a Small-angle neutron scattering
653 2 0 |2 Author
|a Neutron spin-echo spectroscopy
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|a Forschungs-Neutronenquelle Heinz Maier-Leibnitz
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856 7 _ |u http://dx.doi.org/10.1007/s00396-011-2382-3
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