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@ARTICLE{Gerstl:10520,
      author       = {Gerstl, C. and Schneider, G. J. and Pyckhout-Hintzen, W.
                      and Allgaier, J. and Richter, D. and Alegria, A. and
                      Colmenero, J.},
      title        = {{S}egmental and normal mode relaxation of poly(alkylene
                      oxide)s studied by dielectric spectroscopy and rheology},
      journal      = {Macromolecules},
      volume       = {43},
      issn         = {0024-9297},
      address      = {Washington, DC},
      publisher    = {Soc.},
      reportid     = {PreJuSER-10520},
      pages        = {4968 - 4977},
      year         = {2010},
      note         = {The present work has been carried out in the frame of the
                      Joint Programme of Activities of the SoftComp Network of
                      Excellence (Contract NMP3-VT-2004-502235) granted under the
                      FP6 by the European Commission. C.G. acknowledges financial
                      support by the International Helmholtz Research School of
                      Biophysics and Soft Matter (IHRS BioSoft). A.A. and J.C.
                      acknowledge the financial support provided by the Donostia
                      International Physics Center (DIPC), the Basque Country
                      Government (Ref. IT-436-07, Depto. Educacion, Universidades
                      e Investigacion), and the Spanish Ministry of Science and
                      Innovation (Grant MAT 2007-63681).},
      abstract     = {A series of poly(alkylene oxide)s (PAO's) with different
                      lengths of the side chains and two different molecular
                      weights were studied by means of differential scanning
                      calorimetry, dielectric spectroscopy (BDS), and rheology.
                      The glass transition temperatures are almost independent of
                      molar mass and the length of the side chains, which is also
                      reflected by the dielectric a-relaxation, which depends only
                      slightly on the different samples. However, the
                      corresponding maxima in the dielectric loss of the samples
                      with longer side chains show a shoulder at high frequencies
                      with a temperature-dependent shape. The shape of the normal
                      mode changes slightly with the molar mass and the length of
                      the side chain. The normal mode relaxation times show a
                      molar-mass-dependent behavior indicating a significant
                      increase of the entanglement molecular weight M-e with
                      increasing length of the side group. A Rouse mode analysis
                      incorporating the molar mass distribution was performed but
                      could not reproduce the experimental data of the normal mode
                      process completely. The relaxation times obtained by
                      rheology agree well with the dielectric results, and
                      estimates of M-e based on the number of entanglements and on
                      the packing model confirm the values suggested by BDS. A
                      comparison of the estimated chain dimensions with literature
                      data supports the reliability of our calculations.},
      keywords     = {J (WoSType)},
      cin          = {IFF-5 / IFF-4 / Jülich Centre for Neutron Science JCNS
                      (JCNS) ; JCNS},
      ddc          = {540},
      cid          = {I:(DE-Juel1)VDB785 / I:(DE-Juel1)VDB784 /
                      I:(DE-Juel1)JCNS-20121112},
      pnm          = {BioSoft: Makromolekulare Systeme und biologische
                      Informationsverarbeitung / Großgeräte für die Forschung
                      mit Photonen, Neutronen und Ionen (PNI)},
      pid          = {G:(DE-Juel1)FUEK505 / G:(DE-Juel1)FUEK415},
      shelfmark    = {Polymer Science},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000278109700018},
      doi          = {10.1021/ma100384j},
      url          = {https://juser.fz-juelich.de/record/10520},
}