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@ARTICLE{Goracci:280620,
      author       = {Goracci, G. and Arbe, A. and Alegría, A. and Lohstroh, W.
                      and Su, Y. and Colmenero, J.},
      title        = {{D}ynamics of tetrahydrofuran as minority component in a
                      mixture with poly(2-(dimethylamino)ethyl methacrylate): {A}
                      neutron scattering and dielectric spectroscopy
                      investigation},
      journal      = {The journal of chemical physics},
      volume       = {143},
      number       = {9},
      issn         = {1089-7690},
      address      = {Melville, NY},
      publisher    = {American Institute of Physics},
      reportid     = {FZJ-2016-00387},
      pages        = {094505 -},
      year         = {2015},
      abstract     = {We have investigated a mixture of
                      poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) and
                      tetrahydrofuran (THF) (70 $wt. \%$ PDMAEMA/30 $wt. \%$
                      THF) by combining dielectric spectroscopy and quasielastic
                      neutron scattering (QENS) on a labelled sample, focusing on
                      the dynamics of the THF molecules. Two independent processes
                      have been identified. The “fast” one has been qualified
                      as due to an internal motion of the THF ring leading to
                      hydrogen displacements of about 3 Å with rather broadly
                      distributed activation energies. The “slow” process is
                      characterized by an Arrhenius-like temperature dependence of
                      the characteristic time which persists over more than 9
                      orders of magnitude in time. The QENS results evidence the
                      confined nature of this process, determining a size of about
                      8 Å for the volume within which THF hydrogens’ motions
                      are restricted. In a complementary way, we have also
                      investigated the structural features of the sample. This
                      study suggests that THF molecules are well dispersed among
                      side-groups nano-domains in the polymer matrix, ruling out a
                      significant presence of clusters of solvent. Such a good
                      dispersion, together with a rich mobility of the local
                      environment, would prevent cooperativity effects to develop
                      for the structural relaxation of solvent molecules,
                      frustrating thereby the emergence of Vogel-Fulcher-like
                      behavior, at least in the whole temperature interval
                      investigated.},
      cin          = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
                      (München) ; JCNS-FRM-II / JCNS-2},
      ddc          = {540},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-2-20110106},
      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)DNS-20140101 / EXP:(DE-MLZ)TOF-TOF-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000360927000023},
      doi          = {10.1063/1.4929906},
      url          = {https://juser.fz-juelich.de/record/280620},
}