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@ARTICLE{Brs:151795,
      author       = {Brás, Ana Rita Elias and Goossen, Sebastian and Krutyeva,
                      Margarita and Radulescu, Aurel and Farago, Bela and
                      Allgaier, J. and Pyckhout-Hintzen, Wim and Wischnewski,
                      Andreas and Richter, Dieter},
      title        = {{C}ompact structure and non-{G}aussian {D}ynamics of ring
                      polymer melts},
      journal      = {Soft matter},
      volume       = {10},
      number       = {20},
      issn         = {1744-6848},
      address      = {Cambridge},
      publisher    = {Royal Society of Chemistry (RSC)},
      reportid     = {FZJ-2014-01674},
      pages        = {3649-3655},
      year         = {2014},
      abstract     = {We 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},
      cin          = {ICS-1 / Neutronenstreuung ; JCNS-1 / JCNS (München) ;
                      Jülich Centre for Neutron Science JCNS (München) ;
                      JCNS-FRM-II},
      ddc          = {530},
      cid          = {I:(DE-Juel1)ICS-1-20110106 / I:(DE-Juel1)JCNS-1-20110106 /
                      I:(DE-Juel1)JCNS-FRM-II-20110218},
      pnm          = {451 - Soft Matter Composites (POF2-451) / 54G - JCNS
                      (POF2-54G24)},
      pid          = {G:(DE-HGF)POF2-451 / G:(DE-HGF)POF2-54G24},
      experiment   = {EXP:(DE-MLZ)J-NSE-20140101 / EXP:(DE-MLZ)KWS2-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000335927400013},
      doi          = {10.1039/c3sm52717d},
      url          = {https://juser.fz-juelich.de/record/151795},
}