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@ARTICLE{Genix:22574,
      author       = {Genix, A.-C. and Arbe, A. and Colmenero, J. and Wuttke, J.
                      and Richter, D.},
      title        = {{N}eutron {S}cattering and {X}-ray {I}nvestigation of the
                      {S}tructure and {D}ynamics of {P}oly(ethylmethacrylate)},
      journal      = {Macromolecules},
      volume       = {45},
      issn         = {0024-9297},
      address      = {Washington, DC},
      publisher    = {Soc.},
      reportid     = {PreJuSER-22574},
      pages        = {2522 - 2536},
      year         = {2012},
      note         = {We are thankful to W. Schweika from Forschungszentrum
                      Julich, and to the Institut Laue Langevin (ILL, Grenoble,
                      France) scientists P. Fouquet, M. Maccarini, B. Deme, and P.
                      P. Deen for experimental help. The ILL is acknowledged for
                      neutron scattering facilities. We thank support by the
                      "Donostia International Physics Center", the European
                      Commission NoE Soft Comp, Contract NMP3-CT-2004-502235,
                      FP7-PEOPLE-2007-1-1-ITN (DYNACOP, EU), Projects
                      MAT2007-63681 and IT-436-07 (GV) and the Spanish Ministerio
                      de Educacion y Ciencia (Grant No. CSD2006-53). The European
                      Commission, NMI3 Contract RII3-CT-2003-505925, supported the
                      experiments at the Forschungsreaktor in Julich, Germany. The
                      authors acknowledge P. Dieudonne for the X-ray measurements
                      in Montpellier, France.},
      abstract     = {We present a study on the structure and dynamics of
                      poly(ethyl methacrylate) (PEMA), one of the polymers with
                      shortest side-group in the poly(n-alkyl methacrylate)s
                      (PnMAs) series. The contributions to the structure factor
                      have been unveiled by combining T-dependent X-ray and
                      neutron diffraction with polarization analysis on samples
                      with different deuteration labelings, accessing thereby
                      different partial structure factors of PEMA. We find clear
                      hints for strong structural ordering with anticorrelated
                      side-groups and main-chain locations, fitting thus in the
                      general scenario of nanosegregation of main chains and side
                      groups found in higher order PnMAs members. Backscattering
                      measurements on a PEMA sample with deuterated side-group
                      have revealed the dynamics of main-chain and alpha-methyl
                      group hydrogens. The characterization of the rotations of
                      the latter indicates highly disordered environments in the
                      glassy state. Above the glass transition, the incoherent
                      scattering function related to segmental relaxation shows
                      stretching and clear deviations from Gaussian behavior in
                      the accessed window. We also present results on the dynamic
                      structure factor (collective dynamics) at the peaks
                      characteristic (i) for the intermain-chain and
                      interside-group-domain correlations and (ii) for the
                      side-group/side-group atomic correlations within the
                      domains. Viscosity dictates the temperature dependence in
                      both cases, and also that of the dielectric spectroscopy
                      results at high temperatures. However, the a-process
                      followed by dielectric relaxation deviates from the
                      rheological behavior when approaching the calorimetric
                      glass-transition, indicating a strong influence of the
                      faster side-group motions on the dynamics of the dielectric
                      probes.},
      keywords     = {J (WoSType)},
      cin          = {ICS-1 / JCNS (München) ; Jülich Centre for Neutron
                      Science JCNS (München) ; JCNS-FRM-II / JCNS-1},
      ddc          = {540},
      cid          = {I:(DE-Juel1)ICS-1-20110106 /
                      I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-1-20110106},
      pnm          = {BioSoft: Makromolekulare Systeme und biologische
                      Informationsverarbeitung (FUEK505) / 544 - In-house Research
                      with PNI (POF2-544) / DYNACOP - DYNamics of Architecturally
                      COmplex Polymers (214627)},
      pid          = {G:(DE-Juel1)FUEK505 / G:(DE-HGF)POF2-544 /
                      G:(EU-Grant)214627},
      experiment   = {EXP:(DE-MLZ)SPHERES-20140101},
      shelfmark    = {Polymer Science},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000301397800040},
      doi          = {10.1021/ma202653k},
      url          = {https://juser.fz-juelich.de/record/22574},
}