Hauptseite > Publikationsdatenbank > Tale of Two Tails: Molecular Exchange Kinetics of Telechelic Polymer Micelles > print

001     877415
005     20210130005028.0
024 7 _ |a 10.1103/PhysRevLett.124.197801
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024 7 _ |a 1079-7114
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100 1 _ |a König, Nico
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245 _ _ |a Tale of Two Tails: Molecular Exchange Kinetics of Telechelic Polymer Micelles
260 _ _ |a College Park, Md.
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520 _ _ |a Telechelic polymers contain two chain ends that are able to promote self-assembly into “flowerlike” or interconnected micellar structures. Here, we investigate the molecular exchange kinetics of such micelles using time-resolved small-angle neutron scattering. We show that the activation energies of monofunctional and telechelic chain exchange are identical. This demonstrates that the two chain ends are not simultaneously released in a single event. Instead, the results show that, contrary to regular micelles, the kinetics occurs in a multistep process involving a collision-induced single-molecule exchange mechanism where the exchange rate is directly proportional to the polymer concentration. We show that this novel mechanism can be quantitatively explained by a simple kinetic model.
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700 1 _ |a Willner, Lutz
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700 1 _ |a Pipich, Vitaliy
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700 1 _ |a Mahmoudi, Najet
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700 1 _ |a Lund, Reidar
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773 _ _ |a 10.1103/PhysRevLett.124.197801
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