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@ARTICLE{Krutyeva:827740,
      author       = {Krutyeva, M. and Pasini, S. and Monkenbusch, M. and
                      Allgaier, J. and Maiz, J. and Mijangos, C. and
                      Hartmann-Azanza, B. and Steinhart, M. and Jalarvo, N. and
                      Richter, D.},
      title        = {{P}olymer dynamics under cylindrical confinement featuring
                      a locally repulsive surface: {A} quasielastic neutron
                      scattering study},
      journal      = {The journal of chemical physics},
      volume       = {146},
      number       = {20},
      issn         = {1089-7690},
      address      = {Melville, NY},
      publisher    = {American Institute of Physics},
      reportid     = {FZJ-2017-01846},
      pages        = {203306 -},
      year         = {2017},
      abstract     = {We investigated the effect of intermediate cylindrical
                      confinement with locally repulsive walls on the segmental
                      and entanglement dynamics of a polymer melt by quasielastic
                      neutron scattering. As a reference, the corresponding
                      polymer melt was measured under identical conditions. The
                      locally repulsive confinement was realized by hydrophilic
                      anodic alumina nanopores with a diameter of 20 nm. The
                      end-to-end distance of the hydrophobic infiltrated
                      polyethylene-alt-propylene was close to this diameter. In
                      the case of hard wall repulsion with negligible local
                      attraction, several simulations predicted an acceleration of
                      segmental dynamics close to the wall. Other than in
                      attractive or neutral systems, where the segmental dynamics
                      is slowed down, we found that the segmental dynamics in the
                      nanopores is identical to the local mobility in the bulk.
                      Even under very careful scrutiny, we could not find any
                      acceleration of the surface-near segmental motion. On the
                      larger time scale, the neutron spin-echo experiment showed
                      that the Rouse relaxation was not altered by confinement
                      effects. Also the entanglement dynamics was not affected.
                      Thus at moderate confinement conditions, facilitated by
                      locally repulsive walls, the dynamics remains as in the bulk
                      melt, a result that is not so clear from simulations.},
      cin          = {ICS-1 / Neutronenstreuung ; JCNS-1 / JCNS-2 / JCNS
                      (München) ; Jülich Centre for Neutron Science JCNS
                      (München) ; JCNS-FRM-II / JCNS-SNS},
      ddc          = {540},
      cid          = {I:(DE-Juel1)ICS-1-20110106 / I:(DE-Juel1)JCNS-1-20110106 /
                      I:(DE-Juel1)JCNS-2-20110106 /
                      I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-SNS-20110128},
      pnm          = {551 - Functional Macromolecules and Complexes (POF3-551) /
                      6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)
                      / 6215 - Soft Matter, Health and Life Sciences (POF3-621)},
      pid          = {G:(DE-HGF)POF3-551 / G:(DE-HGF)POF3-6G4 /
                      G:(DE-HGF)POF3-6215},
      experiment   = {EXP:(DE-MLZ)J-NSE-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000401778900008},
      pubmed       = {pmid:28571352},
      doi          = {10.1063/1.4974836},
      url          = {https://juser.fz-juelich.de/record/827740},
}