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@ARTICLE{Glomann:137614,
      author       = {Glomann, Thomas and Hamm, Adrian and Allgaier, Jürgen and
                      Hübner, Eike G. and Radulescu, Aurel and Farago, Bela and
                      Schneider, Gerald Johannes},
      title        = {{A} microscopic view on the large scale chain dynamics in
                      nanocomposites with attractive interactions},
      journal      = {Soft matter},
      volume       = {44},
      number       = {9},
      issn         = {1744-6848},
      address      = {Cambridge},
      publisher    = {Royal Society of Chemistry (RSC)},
      reportid     = {FZJ-2013-03994},
      pages        = {10559-10571},
      year         = {2013},
      note         = {Creative Commons Licence CCBYNC},
      abstract     = {We use neutron spin-echo spectroscopy to investigate the
                      large scale chain dynamics in unentangled polymer
                      nanocomposites where stable polymer layers around
                      nanoparticles are dynamically formed due to attractive
                      segment–surface interactions. The work here focuses on the
                      detailed microscopic characterization of the dynamics within
                      these layers of bound poly(ethylene glycol) (PEO) and
                      poly(butylene oxide) (PBO) chains at a fixed silica
                      nanoparticle fraction of $15\%.$ The substitution of hydroxy
                      by methoxy terminated chains thereby clearly evidences the
                      importance of the chain end chemistry in these systems as
                      the layer structure and dynamics therein significantly
                      depend on the specific interaction mechanism. The
                      experimental data reveal a densely packed thick shell of
                      end-attached chains in the case of hydroxy ends contrasted
                      by a thin shell of laterally adsorbed chains with multiple
                      attachments in the methoxy case. In all cases a consistent
                      quantitative modeling is presented that evidences unchanged
                      segmental dynamics within the bound layers. The obtained
                      picture is further validated on an independent model system
                      based on PBO polymers which shows surprisingly similar chain
                      dynamics as for PEG in the nanocomposite pointing to a very
                      generic dynamic scenario.},
      cin          = {JCNS-1 / JCNS (München) ; Jülich Centre for Neutron
                      Science JCNS (München) ; JCNS-FRM-II / ICS-1},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JCNS-1-20110106 /
                      I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)ICS-1-20110106},
      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)KWS1-20140101 / EXP:(DE-MLZ)KWS2-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000326287700014},
      doi          = {10.1039/c3sm51194d},
      url          = {https://juser.fz-juelich.de/record/137614},
}