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000877415 245__ $$aTale of Two Tails: Molecular Exchange Kinetics of Telechelic Polymer Micelles
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000877415 520__ $$aTelechelic 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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000877415 7001_ $$0P:(DE-Juel1)131036$$aWillner, Lutz$$b1$$eCorresponding author
000877415 7001_ $$0P:(DE-Juel1)130893$$aPipich, Vitaliy$$b2
000877415 7001_ $$00000-0003-4936-6911$$aMahmoudi, Najet$$b3
000877415 7001_ $$00000-0001-8017-6396$$aLund, Reidar$$b4
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