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@ARTICLE{Staropoli:838854,
      author       = {Staropoli, Mariapaola and Raba, Andreas and Hövelmann,
                      Claas H. and Appavou, Marie-Sousai and Allgaier, Jürgen and
                      Krutyeva, Margarita and Pyckhout-Hintzen, Wim and
                      Wischnewski, Andreas and Richter, Dieter},
      title        = {{M}elt dynamics of supramolecular comb polymers:
                      {V}iscoelastic and dielectric response},
      journal      = {Journal of rheology},
      volume       = {61},
      number       = {6},
      issn         = {1520-8516},
      address      = {Melville, NY [u.a.]},
      publisher    = {Inst.},
      reportid     = {FZJ-2017-07364},
      pages        = {1185 - 1196},
      year         = {2017},
      abstract     = {The structure and the dynamics of supramolecular comblike
                      polymers in the melt state is studied by a combination of
                      linear rheology, dielectric spectroscopy, and small angle
                      neutron scattering. The system consists of blends of
                      1,2-polybutyleneoxide (PBO) entangled backbones, randomly
                      functionalized with thymine (thy) and barely entangled PBO
                      graft chains—modified with 2,4-diamino-1,3,5-triazine
                      (DAT) end groups. These bioinspired groups associate into a
                      transiently branched comb architecture through
                      heterocomplementary interaction involving the two different
                      hydrogen bonding groups thy and DAT. In the present
                      manuscript, we focus on the comparison of the macroscopic
                      dynamics of the associating blends and permanent comb
                      analogs. The viscoelastic and dielectric response of
                      covalent and reversible combs are found to be comparable.
                      The viscoelastic response of mixtures of thy-functionalized
                      entangled backbones and DAT-end-modified barely entangled
                      chains show a relaxation mechanism, which is mostly
                      attributed to the association/breakage dynamics of the
                      transient bonds with characteristic time ∼1 s  at
                      T=−25 °C. In the parallel dielectric investigation, the
                      reversible branched structure is still evident from the
                      comparison with the corresponding permanent combs and allows
                      the distinction between fixed arms relaxation and the
                      lifetime. A α∗  process of the thy-thy association is
                      likewise detected. The time scale of the supramolecular
                      association makes the thy-DAT pair an ideal candidate for
                      the development of responsive materials that combine
                      permanent and transient linkages for novel applications and
                      self-healing properties},
      cin          = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
                      (München) ; JCNS-FRM-II / Neutronenstreuung ; JCNS-1 /
                      JCNS-2 / ICS-1},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-1-20110106 / I:(DE-Juel1)JCNS-2-20110106 /
                      I:(DE-Juel1)ICS-1-20110106},
      pnm          = {531 - Condensed Matter and Molecular Building Blocks
                      (POF3-531) / 551 - Functional Macromolecules and Complexes
                      (POF3-551)},
      pid          = {G:(DE-HGF)POF3-531 / G:(DE-HGF)POF3-551},
      experiment   = {EXP:(DE-MLZ)KWS2-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000414273200012},
      doi          = {10.1122/1.5001059},
      url          = {https://juser.fz-juelich.de/record/838854},
}