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000839928 245__ $$aImportance of Compact Random Walks for the Rheology of Transient Networks
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000839928 520__ $$aControlling the mechanical behavior of novel supramolecular materials is of the utmost importance and requires a fundamental understanding of the underlying physical processes. We present a multimethods approach to the dynamics of entangled transient polyisoprene networks. Small-angle neutron scattering (SANS) on randomly functionalized chains shows homogeneous supramolecular melts with Gaussian chain conformations. The H-bond lifetimes (dielectric α*-process) and the rheological response in terms of the loss modulus G″ differ by 2 orders of magnitude in time. Within the concept of a compact random walk (RW), where the random walker (urazole group acting as a sticker) undergoes multiple returns to its starting point and following the concept of theoretical proposed renormalized sticky bond lifetimes, we quantitatively solve this longstanding and unexplained large discrepancy: While the bond opening gives rise to the dielectric response, for rheological relaxation the association with a new partner is relevant. This takes place only after multiple returns to the original binding partner.
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000839928 65017 $$0V:(DE-MLZ)GC-1602-2016$$2V:(DE-HGF)$$aPolymers, Soft Nano Particles and  Proteins$$x0
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000839928 7001_ $$0P:(DE-HGF)0$$aHövelmann, C. H.$$b1
000839928 7001_ $$0P:(DE-Juel1)144193$$aLühmann, N.$$b2
000839928 7001_ $$0P:(DE-Juel1)145431$$aSzekely, Noemi$$b3
000839928 7001_ $$0P:(DE-Juel1)130902$$aPyckhout-Hintzen, W.$$b4
000839928 7001_ $$0P:(DE-Juel1)131040$$aWischnewski, A.$$b5
000839928 7001_ $$0P:(DE-Juel1)130917$$aRichter, D.$$b6
000839928 773__ $$0PERI:(DE-600)2644375-2$$a10.1021/acsmacrolett.6b00880$$gVol. 6, no. 2, p. 73 - 77$$n2$$p73 - 77$$tACS Macro Letters$$v6$$x2161-1653$$y2017
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