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@ARTICLE{Kruteva:904676,
      author       = {Kruteva, Margarita and Zamponi, Michaela and Hoffmann, Ingo
                      and Allgaier, Jürgen and Monkenbusch, Michael and Richter,
                      Dieter},
      title        = {{N}on-{G}aussian and {C}ooperative {D}ynamics of
                      {E}ntanglement {S}trands in {P}olymer {M}elts},
      journal      = {Macromolecules},
      volume       = {54},
      number       = {24},
      issn         = {0024-9297},
      address      = {Washington, DC},
      publisher    = {Soc.},
      reportid     = {FZJ-2022-00025},
      pages        = {11384 - 11391},
      year         = {2021},
      abstract     = {A study on tracer diffusion of short poly(ethylene oxide)
                      (PEO) in a strongly entangled PEO melt by neutron spin echo
                      spectroscopy (NSE) is presented. It has been found that
                      within the entanglement volume, the dynamics of the
                      entanglement strands is significantly Non-Gaussian.
                      Following theoretical predictions the Non-Gaussian
                      correction were quantified in terms of a logarithmic
                      Gaussian function with a maximum at a time in the order of
                      the Rouse times of the different tracers and a width that is
                      independent of the tracer’s length. The strength of the
                      Non-Gaussian correction is found to be equal for all tracers
                      providing another proof that the tracers mirror the host
                      dynamics, which needs to be independent of the tracer
                      length. independent of their molecular weight, the
                      tracer’s center-of-mass mean square displacements are
                      sub-diffusive at short times until they have reached the
                      size of the reptation tube d. We this it has been shown that
                      the host dynamics within the tube is not only cooperative
                      but also significantly Non-Gaussian.},
      cin          = {JCNS-1 / MLZ / JCNS-FRM-II / JCNS-4 / JCNS-2},
      ddc          = {540},
      cid          = {I:(DE-Juel1)JCNS-1-20110106 / I:(DE-588b)4597118-3 /
                      I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-4-20201012 / I:(DE-Juel1)JCNS-2-20110106},
      pnm          = {6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ)
                      (POF4-6G4) / 632 - Materials – Quantum, Complex and
                      Functional Materials (POF4-632)},
      pid          = {G:(DE-HGF)POF4-6G4 / G:(DE-HGF)POF4-632},
      experiment   = {EXP:(DE-MLZ)External-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000755658700018},
      doi          = {10.1021/acs.macromol.1c01859},
      url          = {https://juser.fz-juelich.de/record/904676},
}