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@ARTICLE{Krause:1007369,
      author       = {Krause, Daniel T. and Krämer, Susanna and Siozios,
                      Vassilios and Butzelaar, Andreas J. and Dulle, Martin and
                      Förster, Beate and Theato, Patrick and Mayer, Joachim and
                      Winter, Martin and Förster, Stephan and Wiemhöfer,
                      Hans-Dieter and Grünebaum, Mariano},
      title        = {{I}mproved {R}oute to {L}inear {T}riblock {C}opolymers by
                      {C}oupling with {G}lycidyl {E}ther-{A}ctivated
                      {P}oly(ethylene oxide) {C}hains},
      journal      = {Polymers},
      volume       = {15},
      number       = {9},
      issn         = {2073-4360},
      address      = {Basel},
      publisher    = {MDPI},
      reportid     = {FZJ-2023-02034},
      pages        = {2128 -},
      year         = {2023},
      abstract     = {Poly(ethylene oxide) block copolymers (PEOz BCP) have been
                      demonstrated to exhibit remarkably high lithium ion (Li+)
                      conductivity for Li+ batteries applications. For linear
                      poly(isoprene)-b-poly(styrene)-b-poly(ethylene oxide)
                      triblock copolymers (PIxPSyPEOz), a pronounced maximum ion
                      conductivity was reported for short PEOz molecular weights
                      around 2 kg mol−1. To later enable a systematic
                      exploration of the influence of the PIx and PSy block
                      lengths and related morphologies on the ion conductivity, a
                      synthetic method is needed where the short PEOz block length
                      can be kept constant, while the PIx and PSy block lengths
                      could be systematically and independently varied. Here, we
                      introduce a glycidyl ether route that allows covalent
                      attachment of pre-synthesized glycidyl-end functionalized
                      PEOz chains to terminate PIxPSy BCPs. The attachment
                      proceeds to full conversion in a simplified and reproducible
                      one-pot polymerization such that PIxPSyPEOz with narrow
                      chain length distribution and a fixed PEOz block length of z
                      = 1.9 kg mol−1 and a Đ = 1.03 are obtained. The
                      successful quantitative end group modification of the PEOz
                      block was verified by nuclear magnetic resonance (NMR)
                      spectroscopy, gel permeation chromatography (GPC) and
                      differential scanning calorimetry (DSC). We demonstrate
                      further that with a controlled casting process, ordered
                      microphases with macroscopic long-range directional order
                      can be fabricated, as demonstrated by small-angle X-ray
                      scattering (SAXS), scanning electron microscopy (SEM) and
                      transmission electron microscopy (TEM). It has already been
                      shown in a patent, published by us, that BCPs from the
                      synthesis method presented here exhibit comparable or even
                      higher ionic conductivities than those previously published.
                      Therefore, this PEOz BCP system is ideally suitable to
                      relate BCP morphology, order and orientation to macroscopic
                      Li+ conductivity in Li+ batteries.},
      cin          = {IEK-12 / IBG-3 / JARA-FIT},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-12-20141217 / I:(DE-Juel1)IBG-3-20101118 /
                      $I:(DE-82)080009_20140620$},
      pnm          = {2173 - Agro-biogeosystems: controls, feedbacks and impact
                      (POF4-217)},
      pid          = {G:(DE-HGF)POF4-2173},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {37177276},
      UT           = {WOS:000987334400001},
      doi          = {10.3390/polym15092128},
      url          = {https://juser.fz-juelich.de/record/1007369},
}