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@ARTICLE{Arbe:283546,
      author       = {Arbe, Arantxa and Pomposo, José A. and Asenjo-Sanz, Isabel
                      and Bhowmik, Debsindhu and Ivanova, Oxana and Kohlbrecher,
                      Joachim and Colmenero, Juan},
      title        = {{S}ingle {C}hain {D}ynamic {S}tructure {F}actor of {L}inear
                      {P}olymers in an {A}ll-{P}olymer {N}ano-{C}omposite},
      journal      = {Macromolecules},
      volume       = {49},
      number       = {6},
      issn         = {1520-5835},
      address      = {Washington, DC},
      publisher    = {Soc.},
      reportid     = {FZJ-2016-01862},
      pages        = {2354–2364},
      year         = {2016},
      abstract     = {We present neutron spin echo (NSE) experiments on the
                      single chain dynamic structure factor of long poly(ethylene
                      oxide) (PEO) linear chains in the presence of poly(methyl
                      methacrylate)-based single-chain nanoparticles (SCNPs). A
                      complementary structural characterization of the system
                      discards a significant interpenetration of the components
                      and reveals a close to globular conformation of the SCNPs
                      when surrounded by PEO chains. Analogous NSE measurements on
                      blends of PEO with the linear precursor chains of the SCNPs
                      are taken as a reference for the dynamics study. For short
                      times (below approximately 5 ns) PEO in both mixtures
                      exhibits slowed down Rouse dynamics with respect to bulk PEO
                      behavior. The similar deceleration observed in both
                      environments suggests this effect to be due to the large
                      dynamic asymmetry in the mixtures as evidenced by DSC
                      experiments. More interestingly, the NSE results at longer
                      times reveal a spectacular increase of the explored volume
                      of PEO chains in the all-polymer nanocomposite that is
                      absent in the blend with linear precursor chains: assuming
                      the reptation model, the apparent tube diameter confining
                      PEO chain motions in the nanocomposite is about $80\%$
                      larger than in bulk PEO. This can be considered as the first
                      NSE direct observation of disentanglement in a
                      nanocomposite},
      cin          = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
                      (München) ; JCNS-FRM-II / Neutronenstreuung ; JCNS-1},
      ddc          = {540},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-1-20110106},
      pnm          = {6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
                      Neutron Research (JCNS) (POF3-623)},
      pid          = {G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
      experiment   = {EXP:(DE-MLZ)J-NSE-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000372856300042},
      doi          = {10.1021/acs.macromol.5b02519},
      url          = {https://juser.fz-juelich.de/record/283546},
}