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@ARTICLE{Mineart:867570,
      author       = {Mineart, Kenneth P. and Ryan, Justin J. and Appavou,
                      Marie-Sousai and Lee, Byeongdu and Gradzielski, Michael and
                      Spontak, Richard J.},
      title        = {{S}elf-{A}ssembly of a {M}idblock-{S}ulfonated {P}entablock
                      {C}opolymer in {M}ixed {O}rganic {S}olvents: {A} {C}ombined
                      {SAXS} and {SANS} {A}nalysis},
      journal      = {Langmuir},
      volume       = {35},
      number       = {4},
      issn         = {1520-5827},
      address      = {Washington, DC},
      publisher    = {ACS Publ.},
      reportid     = {FZJ-2019-06193},
      pages        = {1032 - 1039},
      year         = {2019},
      abstract     = {Ionic, and specifically sulfonated, block copolymers are
                      continually gaining interest in the soft materials community
                      due to their unique suitability in various ion-exchange
                      applications such as fuel cells, organic photovoltaics, and
                      desalination membranes. One unresolved challenge inherent to
                      these materials is solvent templating, that is, the
                      translation of self-assembled solution structures into
                      nonequilibrium solid film morphologies. Recently, the use of
                      mixed polar/nonpolar organic solvents has been examined in
                      an effort to elucidate and control the solution
                      self-assembly of sulfonated block copolymers. The current
                      study sheds new light on micellar assemblies (i.e., those
                      with the sulfonated blocks comprising the micellar core) of
                      a midblock-sulfonated pentablock copolymer in polar/nonpolar
                      solvent mixtures by combining small-angle X-ray and
                      small-angle neutron scattering. Our scattering data reveal
                      that micelle size depends strongly on overall solvent
                      composition: micelle cores and coronae grow as the fraction
                      of nonpolar solvent is increased. Universal model fits
                      further indicate that an unexpectedly high fraction of the
                      micelle cores is occupied by polar solvent (60–80 vol
                      $\%)$ and that partitioning of the polar solvent into
                      micelle cores becomes more pronounced as its overall
                      quantity decreases. This solvent presence in the micelle
                      cores explains the simultaneous core/corona growth, which is
                      otherwise counterintuitive. Our findings provide a potential
                      pathway for the formation of solvent-templated films with
                      more interconnected morphologies due to the greatly solvated
                      micellar cores in solution, thereby enhancing the molecular,
                      ion, and electron-transport properties of the resultant
                      films.},
      cin          = {JCNS-FRM-II / JCNS-1 / MLZ},
      ddc          = {540},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-1-20110106 / I:(DE-588b)4597118-3},
      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)KWS2-20140101},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:30609374},
      UT           = {WOS:000457503500022},
      doi          = {10.1021/acs.langmuir.8b03825},
      url          = {https://juser.fz-juelich.de/record/867570},
}