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000151795 1001_ $$0P:(DE-HGF)0$$aBrás, Ana Rita Elias$$b0$$eCorresponding author
000151795 245__ $$aCompact structure and non-Gaussian Dynamics of ring polymer melts
000151795 260__ $$aCambridge$$bRoyal Society of Chemistry (RSC)$$c2014
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000151795 520__ $$aWe present a neutron scattering analysis of the structure and dynamics of PEO polymer rings with a molecular weight 2.5 times higher than the entanglement mass. The melt structure was found to be more compact than a Gaussian model would suggest. With increasing time the center of mass (c.o.m.) diffusion undergoes a transition from sub-diffusive to diffusive behavior. The transition time agrees well with the decorrelation time predicted by a mode coupling approach. As a novel feature well pronounced non-Gaussian behavior of the c.o.m. diffusion was found that shows surprising analogies to the cage effect known from glassy systems. Finally, the longest wavelength Rouse modes are suppressed possibly as a consequence of an onset of lattice animal features as hypothesized in theoretical approaches
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000151795 7001_ $$0P:(DE-Juel1)144649$$aGoossen, Sebastian$$b1$$ufzj
000151795 7001_ $$0P:(DE-Juel1)130777$$aKrutyeva, Margarita$$b2$$ufzj
000151795 7001_ $$0P:(DE-Juel1)130905$$aRadulescu, Aurel$$b3$$ufzj
000151795 7001_ $$0P:(DE-HGF)0$$aFarago, Bela$$b4
000151795 7001_ $$0P:(DE-Juel1)130501$$aAllgaier, J.$$b5$$ufzj
000151795 7001_ $$0P:(DE-Juel1)130902$$aPyckhout-Hintzen, Wim$$b6$$ufzj
000151795 7001_ $$0P:(DE-Juel1)131040$$aWischnewski, Andreas$$b7$$ufzj
000151795 7001_ $$0P:(DE-Juel1)130917$$aRichter, Dieter$$b8$$ufzj
000151795 773__ $$0PERI:(DE-600)2191476-X$$a10.1039/c3sm52717d$$gp. 10.1039.c3sm52717d$$n20$$p3649-3655$$tSoft matter$$v10$$x1744-6848$$y2014
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