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@ARTICLE{Vishnevetskaya:856727,
      author       = {Vishnevetskaya, Natalya S. and Hildebrand, Viet and
                      Dyakonova, Margarita A. and Niebuur, Bart-Jan and Kyriakos,
                      Konstantinos and Raftopoulos, Konstantinos N. and Di, Zhenyu
                      and Müller-Buschbaum, Peter and Laschewsky, André and
                      Papadakis, Christine M.},
      title        = {{D}ual {O}rthogonal {S}witching of the
                      “{S}chizophrenic” {S}elf-{A}ssembly of {D}iblock
                      {C}opolymers},
      journal      = {Macromolecules},
      volume       = {51},
      number       = {7},
      issn         = {1520-5835},
      address      = {Washington, DC},
      publisher    = {Soc.},
      reportid     = {FZJ-2018-06078},
      pages        = {2604 - 2614},
      year         = {2018},
      abstract     = {Based on diblock copolymers, a pair of “schizo-phrenic”
                      micellar systems is designed by combining a nonionic
                      andthermoresponsive block with a zwitterionic block, which
                      isthermoresponsive and salt-sensitive. The nonionic block
                      ispoly(N-isopropylacrylamide) (PNIPAM) or
                      poly(N-isopropyl-methacrylamide) (PNIPMAM) and exhibits a
                      lower criticalsolution temperature (LCST) behavior in
                      aqueous solution. Thezwitterionic block is a
                      polysulfobetaine, i.e.,
                      poly(4-((3-methacryl-amidopropyl)dimethylammonio)butane-1-sulfonate)
                      (PSBP), andhas an upper critical solution temperature (UCST)
                      behavior withthe clearing point decreasing with increasing
                      salt concentration. The PSBP-b-PNIPAM and PSBP-b-PNIPMAM
                      diblockcopolymers are prepared by successive reversible
                      addition−fragmentation chain transfer (RAFT)
                      polymerizations. The PSBPblock is chosen such that the
                      clearing point of the homopolymer is significantly higher
                      in pure water than the cloud point ofPNIPAM or PNIPMAM.
                      Using turbidimetry, 1H NMR, and small-angle neutron
                      scattering, we investigate the overall phasebehavior as well
                      as the structure and interaction between the micelles and
                      the intermediate phase, both in salt-free D2O and in0.004 M
                      NaBr in D2O in a wide temperature range. We find that
                      PSBP-b-PNIPAM at 50 g L−1 in salt-free D2O is turbid in
                      theentire temperature range. It forms spherical micelles
                      below the cloud point of PNIPAM and cylindrical micelles
                      above. Similarbehavior is observed for PSBP-b-PNIPMAM at 50
                      g L−1 in salt-free D2O with a slight and smooth increase
                      of the lighttransmission below the cloud point of PNIPMAM
                      and an abrupt decrease above. Upon addition of 0.004 M NaBr,
                      the UCST-type cloud point of the PSBP-block is notably
                      decreased, and an intermediate regime is encountered below
                      the cloud point ofPNIPMAM, where the light transmission is
                      slightly enhanced. In this regime, the polymer solution
                      exhibits behavior typical forpolyelectrolyte solutions.
                      Thus, double thermosensitive and salt-sensitive behavior
                      with “schizophrenic” micelle formation isfound, and the
                      width of the intermediate regime, where both blocks are
                      hydrophilic, can be tuned by the addition of electrolyte.},
      cin          = {JCNS-FRM-II / Neutronenstreuung ; JCNS-1},
      ddc          = {540},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-1-20110106},
      pnm          = {6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)
                      / 6G15 - FRM II / MLZ (POF3-6G15)},
      pid          = {G:(DE-HGF)POF3-6G4 / G:(DE-HGF)POF3-6G15},
      experiment   = {EXP:(DE-MLZ)KWS1-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000430022000021},
      doi          = {10.1021/acs.macromol.8b00096},
      url          = {https://juser.fz-juelich.de/record/856727},
}